TechConnect Newsletter, Volume 17, Issue 6, 2010
Transcription
TechConnect Newsletter, Volume 17, Issue 6, 2010
November & December 2010 GM dexos ™ Engine Oil Increases Engine Efficiency dexos™ Classifications New for the 2011 model year, GM will introduce dexos1™ certified engine oil as a factory fill and service fill for its gasoline engines worldwide. The new engine oil specification has been developed to help meet the increased demands for enhanced engine efficiency. dexos™ oil helps deliver increased fuel efficiency and reduced engine emissions. The dexos™ specification includes two classifications. GM will require dexos1™ for global factory fill in spark ignited engines worldwide and service fill for gasoline engines worldwide. It will replace the GM6094M specification for most GM gasoline engines. dexos™ is a GM proprietary engine oil specification that has been designed to: • Further improve fuel economy (to meet future Corporate Average Fuel Economy, CAFE, requirements) and fuel economy retention through improved viscometric properties that create less friction in the engine, which allows the oil to maintain its fuel economy benefits throughout the longer life of the oil dexos2™, required for diesel engines as well as a service fill for gasoline engines in Europe, was introduced in Europe late last year. GF-5 Standard • Provide a more robust formulation for added engine protection that offers improved oxidation and deposit-forming tendencies and aeration performance, which enables fuel-saving devices, such as Variable Valve Timing, to work optimally In addition to GM dexos™, a new International Lubricants Standardization continued on page 2 IN THIS ISSUE GM dexos™ Engine Oil Increases Engine Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . .1 • Support GM’s Oil Life Monitoring System (OLMS) by resisting degradation between oil changes New ACDelco Tiered Branding Strategy . . . . . . .1 Special Oil Pump Helps Conserve Fuel . . . . . . . .3 • Ensure worldwide availability of equal quality oil while reducing the duplication of a large number of internal GM engine oil specifications, replacing GM specifications GM-LL-A-025, GM6094M and GM4718M dexos1™ also is backward compatible for older vehicles; however, the owner manual oil specification in prior model years remains acceptable. Refilling Diesel Exhaust Fluid . . . . . . . . . . . . . . . . .4 Common Towing Questions . . . . . . . . . . . . . . . . . .5 2011 MACS Convention . . . . . . . . . . . . . . . . . . . . . .5 TSS Growth Incentive Program . . . . . . . . . . . . . . .6 GM New Vehicle Supplier Discount One of Many TSS Benefits . . . . . . . . . . . . . . . . . . .6 Tech Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 New ACDelco Tiered Branding Strategy Training Update . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Cold Weather Driving Tips . . . . . . . . . . . . . . . . . . .8 Consumers today have expressed that they want choices for automotive parts and service that fit their priorities and budgets — from “economy” to “professional” grades — in the same way that products in other sectors are sold. To make it easier for customers to identify which ACDelco product will meet their performance expectations as well as their budget, ACDelco has introduced a new tiered branding strategy. continued on page 3 ON THE WEB – www.acdelcotechconnect.com, click the TechConnect Magazine link, or – Log in to the ACDelco LMS, click the Resources link GM dexos™ Engine Oil — continued from page 1 and Approval Committee (ILSAC) standard, GF-5, will be introduced in 2010. There will be a new API engine oil service category – SN Resource Conserving. The current GF-4 standard was put in place in 2004. The GF-5 standard will use a new engine fuel economy test, called Sequence VID (six D), which provides a statistically significant increase in fuel economy versus the Sequence VIB (six B) test that was used for GF-4. Like dexos™, the new ILSAC GF-5 standard will call for more sophisticated additives. It’s expected that all dexos1™ approved oils will meet GF-5. However, not all GF-5 engine oils will necessarily meet the dexos™ specification. Fuel Economy Since CAFE standards were first introduced in 1974, the fuel economy of cars has more than doubled, while the fuel economy of light trucks has increased by more than 50%. Proposed CAFE standards call for a continuation of increased fuel economy in new cars and trucks. To meet these future requirements, all aspects of vehicle operation are being looked at more critically than ever before. New technology being introduced in GM vehicles designed to address vehicle efficiency and fuel economy include direct injection, cam phasing, turbo-charging and Active Fuel Management. The demands of these technologies on engine oil also are taken into consideration when determining new oil specifications. Active Fuel Management, for example, can help to achieve improved fuel economy, however, alternately starting and stopping cylinders puts a lot of stress on engine oil. owner manual for the proper viscosity grade. Increased Service Intervals Volume 17, Number 6 (TS-PU-0018-10) To help reduce the consumption of oil while maintaining proper engine protection, many GM vehicles equipped with the GM OLMS have a maximum oil change interval that is much longer than what was considered a normal interval just a few years ago. ACDelco TechConnect is published bi-monthly and online for technicians of Total Service Support (TSS) and Key Fleet accounts to provide timely service information, increase knowledge and improve the performance of the service center. ACDelco 360 represents our mission to look at our businesses at every possible angle to provide value and assistance to our distributors and their customers as well as offer a full circle of support with programs, tools, training and marketing focused on enhancing and growing our partnership successfully. If all GM vehicle owners follow the OLMS intervals in their vehicles as intended, GM estimates that more than 100 million gallons of oil could be saved annually. The second generation OLMS will rely on significantly more engine operating information than the current system, which, combined with dexos™ certified oil, could allow a significant extension of the maximum oil change interval. dexos™ specifications call for improved oil robustness to support extended drain intervals over a vehicle’s lifetime. When the OLMS determines that an oil and filter change is needed, the driver is notified by a Change Oil message on the instrument panel. The oil change should be performed within 600 miles (1,000 km). The OLMS must be manually reset when the oil is changed. dexos1™ Availability Currently, ACDelco Synthetic Blend dexos1™ 5W30 engine oil is available through the GM Oil Program in 55 gallon drums (which can be pumped into bulk tanks). Quart-size packaged product will be available in December 2010. Orders may be placed through your local ACDelco oil distributor. To meet tough fuel econACDelco Dealer Part Package omy mandates, Short Viscosity Product Number Size Number the industry will shift toward 19293000 10-9050 5W30 dexos1™ Quart lower viscosity oils. Testing has 55 Gallon shown that thin19293001 10-9051 5W30 dexos1™ Drum ner 0W-20 oil, for example, Additional information about GM can provide as much as a 4% improvedexos™ engine oil is available on the ment in fuel economy over 15W-40 oil. GM dexos™ website, dexos1™ will be offered in these www.gmdexos.com. viscosities: SAE 0W-20, 5W-20, 0W-30 – Thanks to Chris Crosby and and 5W-30. dexos2™ will be available Eric Johnson in SAE 5W-30, 0W-40 and 5W-40. Please check the appropriate vehicle 2 Publisher: Mike DeSander ACDelco E-mail / [email protected] Editor: Mike Militello ACDelco E-mail / [email protected] Technical Editor: Mark Spencer E-mail / [email protected] Production Manager: Marie Meredith Desktop Publishing: 5by5 Design LLC E-mail / [email protected] Write to: * ACDelco TechConnect P.O. Box 500 Troy, MI 48007-0500 On the Web:: To read and search recent issues of TechConnect online: – www.acdelcotechconnect.com, click the TechConnect Magazine link, or – Log in to the ACDelco LMS, click the Resources link ACDelco service tips are intended for use by professional technicians, not a “do-it-yourselfer.” They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, it cannot be assumed that the information applies to all vehicles or that all vehicles will have that condition. All materials and programs described in this magazine are subject to change. Submission of materials implies the right to edit and publish. Inclusion in the publication is not necessarily an endorsement of the individual or the company. TechConnect is published for ACDelco by Sandy Corporation, Troy, MI. ©2010 ACDelco. All rights reserved. Special Oil Pump Helps Conserve Fuel New Tiered Branding Strategy — Modern powertrains continue to increase the demands on engine oil, and in turn, engine oil filters, in order to enhance engine efficiency. continued from page 1 One example is the variable displacement vane oil pump in the Ecotec 1.4L turbocharged engine in the new 2011 Chevrolet Cruze. The oil pump delivers the precise amount of oil needed during all driving conditions. The volume of oil from the pump varies with rpm by changing the pump’s displacement through a pivoting control chamber mechanism and sliding vanes, which requires the engine to work less than with a conventional pump, ultimately saving fuel because reducing the torque demand reduces fuel consumption. The variable displacement oil pump is indirectly regulated by the oil pressure out of the main oil gallery. The purpose of this indirect regulation is to keep a defined maximum pressure in the main oil gallery independent of the individual pressure drop between the pump outlet, the main gallery inlet, and the various engine components. The oil flow of a fixed displacement oil pump is linear to the speed of the pump. This would lead to a too high oil pressure after a certain engine speed (approximately 1000 rpm at cold oil temperature, approximately 3000 rpm at hot oil temperatures). This new branding strategy recognizes today’s changing business realities and represents an opportunity to grow market share by providing customers with a quickly recognizable lineup of high-quality aftermarket products. It can be marketed and communicated through a message of making a simple choice of good, better, and best when choosing ACDelco parts. The three tiers of products that all proudly wear the ACDelco name include: • BEST – GM Original Equipment (OE) – GM brands make up the nation’s largest car fleet, and ACDelco’s portfolio of 40,000 OE service parts replaces those installed during the production of a GM vehicle. OE service parts are built and tested to exact GM standards. • BETTER – ACDelco Professional – This category of high-quality aftermarket products covers GM as well as most other makes and models. Most of the current ACDelco lineup falls into this category, and it is a high-quality alternative to OE products. To reduce the high oil pressure, normal pumps have a relieve valve: a portion of the pressurized, already pumped oil is fed back to the intake of the pump. This is a waste of power. The oil flow of a variable displacement vane pump is linear to the speed and to the eccentricity of the rotor to the slide. The slide is moveable, so it is possible to reduce the oil flow for a given speed by reducing the eccentricity. With a lower flow, the oil pressure is reduced; pump oil flow now equals engine oil flow. • GOOD – ACDelco Advantage – In some market-driven categories, these products offer fit, form and function for most makes and models similar to OE parts, but at a more attractive price. They provide a competitively priced, yet quality alternative, to unbranded aftermarket components. ACDelco launched this line in 2009 with brake drums and rotors, and has expanded it with the launch of the Advantage friction, wiper blades and shocks. The benefits of the variable displacement oil pump increase when used with other technologies, such as variThe illustration shows that the able valve oil pump body pivots (blue lines), timing, which which causes the vanes (red lines) to move. This results in just the right operate using volume of oil being pumped. oil pressure. However, these technologies also place greater stress on the oil and oil filter. Another reason to use the recommended OES oil filter to help maintain oil life. Every ACDelco oil filter meets GM’s specifications to help avoid potential engine damage from poor engine oil flow and engine lubrication. – Thanks to Bob Malone Best – GM OE service parts feature red packaging. Better – Professional parts come in white packaging. Good – The Advantage line of parts are identified by their blue packaging. The tiered branding strategy will help improve how ACDelco classifies and markets ACDelco products. It also will help give technicians and service consultants a better way to talk to customers about the choices they have in choosing ACDelco products based on price, warranty and features/benefits. – Thanks to Curt Collins 3 Refilling Diesel Exhaust Fluid The exhaust aftertreatment technology of the new Duramax 6.6L diesel engine available on the 2011 Silverado and Sierra trucks and 2010 interim and 2011 Express and Savana vans features the use of Diesel Exhaust Fluid (DEF). The DIC also provides similar warning messages for poor quality of DEF and tampering of the DEF system. The DEF system must be refilled periodically in order to maintain proper operation. Refer to the May/June issue of TechConnect for details on DEF system operation. The DEF required for emission reduction is contained in a 5.3 gallon (20 liter) reservoir, providing a range of approximately 5,000 miles (8,000 km) between refills. DEF Messages If the DEF is not refilled, the vehicle’s speed will be limited. The Driver Information Center (DIC) will provide the driver with current information about the DEF system operation and range. These messages include: • EXHAUST FLUID RANGE: 1000 MI • EXHAUST FLUID RANGE: 300 MI Below a range of 300 miles (500 km), the range message or speed limiting messages will appear every time the vehicle is started. On GM full-size trucks, the DEF fill location is underhood. DEF Fill The DEF tank fill location (identified by a blue cap) is next to the fuel filler on GM full-size vans and on the right rear side of the engine compartment on GM full-size trucks. When filling the DEF tank, it’s important to not overfill it. With colder weather coming, keep in mind that DEF behaves like water and will freeze at 12°F (–11°C) and will expand. Adding more than the 5.3 gallon (20 liter) usable capacity may not allow for DEF expansion if it freezes. DEF will not be damaged by freezing, and will remain fully usable when thawed. The fluid tank includes a DEF pump heater, reservoir heater and line heater. Several driver messages will be displayed when the DEF level is low or empty. With an empty DEF tank, limited speed messages will be displayed: • 55 MPH MAX SPEED UPON RESTART (Vehicle speed limited to 55 mph (89 km/h) at the next restart.) • 4 MPH MAX SPEED NEXT FUEL FILL (Vehicle speed limited to 4 mph (7 km/h) after the second fuel fill without refilling the DEF tank.) DEF should be added prior to receiving an Exhaust Fluid Empty message; however, it may take several miles of driving for the DIC message to update. If the Exhaust Fluid Empty message is displayed: • When refilling, more than one gallon of DEF must be added to release the vehicle from speed limitation. • Wait for up to 30 seconds with the engine running for the Exhaust Fluid Empty message to clear. The 5.3 gallon capacity of the DEF tank will last approximately 5,000 miles depending on drive cycles and vehicle use. The easiest way for customers to ensure that the tank is not overfilled is to wait until the EXHAUST FLUID RANGE: 1000 MILES message is displayed on the Driver Information Center. At this approximate mileage, add no more than 3.5 gallons (13 liters) of DEF. When fluid reaches the top of the fill pipe, stop filling. DEF is available from ACDelco in: • 1 gallon (3.78 liter) containers, part number 10-4022 (19286291) • If the vehicle is driven prior to the Exhaust Fluid Empty message clearing, the vehicle will still be speed limited. • 2.5 gallon (9.45 liter) containers, part number 10-4023 (19286292) • If the Exhaust Fluid Empty message clears while driving, the vehicle must be brought to a complete stop to release the speed limitation. If DEF is added under freezing conditions, additional time may be required to release speed limitations. DEF is available from ACDelco in 1 gallon and 2.5 gallon containers. • 55 gallon drums, part number 10-4026 (88863494) • 330 gallon totes, part number 10-4027 (88863495) – Thanks to B.J. Lackey 4 Common Towing Questions example, the hitch ball should not be too high or too low. The hitch ball height will depend on the tow vehicle’s rear GAWR. Whether it’s campers, construction equipment, snowmobiles or any other type of trailer, a vehicle works harder when towing, operating under higher loads and higher temperatures. When towing, it’s important to pay close attention to vehicle maintenance as well as trailer maintenance. Be sure to check fluids, tires and brakes in the tow vehicle and brakes, bearings, tires and electrical systems in the trailer. In addition to maintenance, vehicle and trailer damage can result from overloading a vehicle. Ask your customers these common questions about towing to let them know the importance of proper loading and trailering in order to avoid vehicle damage. Do you know the trailer weight? Be sure drivers know the actual weight of the trailer and the items that are going to be towed, including the gear or supplies. Many truck stops, sand and gravel yards, grain storage sites, moving companies and salvage yards often have scales open to the public. Always check the total trailer weight and the trailer tongue weight before towing anything. Do you know the tow vehicle capacity? The vehicle as equipped must be properly matched to the trailer load. Many websites provide only maximum trailer weight ratings (TWR), which means drivers need additional equipment to achieve the greatest performance for a vehicle that is not equipped with the maximum TWR. Add the weight of the trailer and tow vehicle, including the amount of people and gear in the vehicle. The total of the combination should not exceed the gross combination weight rating (GCWR). The owner’s manual provides vehicle ratings and capabilities. Are you exceeding the weight ratings? Do not overload the trailer tongue weight, tow vehicle and trailer gross vehicle weight ratings (GVWRs), individual tow vehicle and trailer gross axle weight ratings (GAWRs), and individual tire ratings. Too much weight on a trailer can cause damage to the trailer and the tow vehicle, such as broken axles, bearing damage and excessive tire wear. Is the combination set up properly? Make sure that the hitch ball, brake controller, sway controls and weightdistributing spring bars (if used) are properly installed and adjusted. For Balancing the load over the length of the trailer is important. For a proper weight distribution, measure the height of the front fender, just above the center of one of the front wheels before the trailer is connected to the tow vehicle. After it is connected, the front end of the tow vehicle should rise slightly. It is important to apply only enough tension on the spring bars to restore the initial front end height but avoid bringing the front end to a lower position than where it started. Are you driving safely? Always practice safe driving techniques, keeping in mind that the tow vehicle and trailer combination may make it more difficult to maneuver, drive and stop the vehicle while towing. Passing and merging are more difficult with a trailer, so pay extra attention to spacing between other vehicles before attempting to change lanes. In addition, make wider turns than usual because the trailer will track inside of the tow vehicle, which could strike curbs, signs, or other vehicles on the inside of a turn. – Thanks to Robert Krouse 2011 MACS Convention • Using Scan Tools to Diagnose HVAC System Problems The 2011 Mobile Air Conditioning Society (MACS) Worldwide annual convention and trade show will be held January 27-29, 2011, at Disney’s Coronado Springs Resort in Orlando, Fla. ACDelco continues its tradition as a proud sponsor of the convention. • Diagnostic Best Practices • Coding, Re-Learns and Adaptations Several representatives from ACDelco will be presenting the latest service technical information. ACDelco also is sponsoring the Ask the Experts general session on January 28. • Intermittent Electrical and Driveability Diagnostics • The Good, the Bad and the Ugly of Coding, Reflashing and Reprogramming Some of the featured training programs at the convention include: • Diagnostic Case Studies from the 2010 Season For more information, go to the MACS website at www.macsw.org. – Thanks to Mike Militello • Compressor Replacement Procedures to Prevent Comebacks • Working on Hybrid Vehicle A/C Systems • Advanced Cooling System Diagnosis 5 TSS Growth Incentive Program ACDelco has announced a Total Service Support (TSS) Growth Incentive Program that can help TSS service centers trim their 2011 TSS program fee. The incentive is designed to reward TSS accounts that increase their purchases of ACDelco parts over year-ago levels in the fourth quarter (Q4) of 2010. ACDelco will credit the increased investment by reducing the 2011 TSS program fee. The incentive program works like this: • If the TSS service center’s Q4 purchases increase by $1,000 or more over their 2009 Q4 purchases, ACDelco will credit three months worth of the 2011 fee – a $135 value. • If the TSS service center’s Q4 purchases increase by $2,500, ACDelco will credit six months worth of the 2011 fee. That’s a $270 value. This incentive is a great way to save money going into next year. Ask your local ACDelco representative or DDG for more information. – Thanks to Steve Sheldon Program Objective Benefit Earned Value Grow 2009 Q4 Purchases by $1,000 3 Months Free TSS $135 Grow 2009 Q4 Purchases by $2,500 6 Months Free TSS $270 GM New Vehicle Supplier Discount One of Many TSS Benefits The ACDelco Total Service Support (TSS) program is exactly that — a program that offers complete support from ACDelco to help grow your business profitably. In the TSS program, ACDelco offers support and services ranging from access to training that help keep service center technicians up-to-date on the very latest automotive technology to discounts on everything from new GM cars and trucks to uniforms and tools. register on the site. Follow the prompts and input the required information in order to obtain a GM Discount Certificate. You can print out the certificate number, write it down or email it to a recipient. TSS Benefits New GM vehicle discounts are available to TSS accounts and their employees through the GM New Vehicle Supplier Discount program, which GM offers on all new and unused GM passenger vehicles and light-duty trucks. All that’s needed to get the supplier discount savings is a GM New Vehicle Supplier Discount authorization number. The GM New Vehicle Supplier Discount is just one of many TSS program benefits. Other benefits and discounts include: On the GM New Vehicle Supplier Discount page, scroll down the page and click the link, Get Your GM Supplier Discount. Always access the GM supplier discount website through www.acdelcotechconnect.com. This loads the website with the correct company code for TSS service centers. On the website, input your user name and password or, if you don’t have one, – Bosch® diagnostic tools – Technical assistance diagnostic hotline If you have questions about the authorization number process, call the GM Supplier Discount program at 1-800-960-3375. When calling, state your company name as TSS/ACDelco, not your individual service center name. New Vehicle Supplier Discount To get an authorization number, go to www.acdelcotechconnect.com and click the Total Service Support tab. Next, click the ACDelco TSS GM Supplier Discount button on the right side of the page. – ASE Blue Seal program • ACDelco instructor-led and webbased training courses. For details on available technical and business courses, click the Training tab on www.acdelcotechconnect.com • www.acdelco.com locator, directing consumers to your service center • Exclusively Yours Rewards program • Consumer Assurance program • ACDelco Image program • GM Service Information • SPX® tools and equipment • Marketplace discounts – Uniforms for purchase or lease – Enterprise® rental car – Dell® computer 6 Click the GM Supplier Discount button to get an authorization number. Click the Marketplace link for details on all the TSS program benefits. Current TSS accounts can learn more about all of the program discounts and benefits by logging in to www.acdelcotechconnect.com, clicking the Total Service Support tab and then clicking Marketplace. Go to www.acdelcotechconnect.com, for more details regarding the TSS Program, and click the Total Service Support tab or call the ACDelco Customer Support Center at 1-800-825-5886, prompt #0. – Thanks to Steve Sheldon The following technical tips provide repair information about specific conditions on a variety of vehicles. If you have a tough or unusual service repair, the TSS Technical Assistance Hot Line can help. Call 1-800-825-5886, prompt #2, to speak with a technical expert with the latest OEM information. Door Latch Freezing in Cold Temperatures 2005-2007 GM passenger cars and trucks, including Saturn; 2003-2006 HUMMER H2 and 2006 HUMMER H3 In cold temperatures, water from a car wash or off the road may enter the latch and freeze, causing the detent to move slowly. GM Super Lube can be used to resolve latch freezing conditions. Begin by verifying that the striker properly engages the latch and there are not any obstructions preventing the door from closing. After the latch has completely thawed, apply compressed air for two seconds to the latch to force out any moisture. Next, spray GM Super Lube on both sides of the latch detent lever for approximately three seconds. Operate the door latch several times to spread the lubricant on all surfaces. these conditions are found, the complete control arm assembly should be replaced. ACDelco offers a complete control arm assembly with the ball joint installed for repairs that require the assembly due to a problem with the control arm hole. If only the ball joint is being replaced, the ACDelco upper ball joint for these vehicles must have the ball joint housing properly indexed to the existing control arm prior to being pressed in. Because the ball joint is a directional type, the swing angle of the ball joint stud is limited in its range of motion. Incorrect orientation of the ball joint housing could cause premature ball joint wear or control arm failure. To clear the DTC, a scan tool can be used to perform a forced glow service procedure. Do not replace the GPCM because the DTCs do not clear after replacing a glow plug. Using a scan tool, it can be seen that the resistance values of the glow plugs will not be reset in the GPCM — and the DTCs will not clear — without a glow cycle on the current engine start. To perform a forced glow using a scan tool: 1. Perform the necessary repairs 2. Connect a scan tool 3. Turn on ignition 0 and ignition 1 4. Command glow via device control for 1-2 seconds 5. Clear DTCs 6. Disconnect the scan tool 7. Turn off ignition 0 and ignition 1 for 30 seconds 8. Start the vehicle and verify DTCs are not present Spray GM Super Lube on both sides of the latch detent lever (slashed area, shown with latch and backing plate removed). Ball Joint Installation 1999-2006 Cadillac Escalade ESV; Chevrolet Avalanche 3/4 ton, Suburban 3/4 ton, Silverado 1/2 ton HD, 3/4 ton and 1 ton, Express cab; HUMMER H2; GMC Sierra 1/2 ton HD, 3/4 ton and 1 ton, and Yukon XL models Premature ball joint wear or control arm failure may result if the proper steps are not followed for ball joint removal, control arm inspection and ball joint installation. Before removing the existing ball joint from the control arm, inspect the ball joint housing for damage or excessive rust that would make ball joint replacement unacceptable. Never remove a ball joint by hammering or pressing out at an angle, which could damage the control arm. After ball joint removal, inspect the control arm for wear and elongation. If Install the ball joint with the INSTALL INBOARD stamping facing the engine compartment. INSTALL INBOARD is stamped on the bottom of the upper ball joint. Install the words INSTALL INBOARD facing toward the engine compartment of the vehicle. Duramax Diesel Glow Plug Replacement 2006-2011 Duramax diesel engine (RPOs LMM, LGH, LML) After replacing a glow plug on a Duramax diesel engine, it may be noted that a P0671-P0678 DTC (glow plug control circuit DTCs for cylinders 1-8) will not clear. This is because the control module will not clear the DTC if the glow plugs are not energized during the next key cycle. A glow cycle is necessary to allow the GPCM to reset the glow plug resistance calculation, which will clear the DTC. The Glow Plug Control Module (GPCM) will not power the glow plugs if the engine coolant has an elevated temperature (greater than 50° C). 7 The voltage that is applied to the glow plugs during device control is very low at 4 volts. In addition, the GPCM has a maximum glow plug ON time of three minutes. The glow plugs cannot be turned on for a time period longer than three minutes. Diagnostic Assistance For free technical diagnostic assistance and product information regarding specific ACDelco products, contact these toll-free information hotlines staffed by ASE-certified technicians: Brakes – 1-888-701-6169 (prompt #1) Chassis – 1-888-701-6169 (prompt #2) Clutches – 1-888-725-8625 Lift Supports – 1-800-790-5438 Shocks – 1-877-466-7752 Starters and Alternators – 1-800-228-9672 Steering – 1-866-833-5567 Wiper Blades – 1-800-810-7096 How to Take ACDelco Training Current Instructor-Led Training Go to www.acdelcotechconnect.com and click the Training tab to log in to the ACDelco Learning Management System (LMS). ACDelco’s Instructor-Led Training (ILT) courses provide hands-on instruction on the latest automotive systems. Click the Schedule link on the LMS Menu to search the latest training schedule for courses held in your area. • To enroll in an Instructor-Led Training (ILT) course, click the Enrollment link or the Instructor-Led Courses link to view the catalog and select a specific course. • To enroll in a Virtual Classroom Training (VCT) course, click the Enrollment link or the Virtual Classroom Training Courses link to view the catalog and select a specific course. The following ILT courses are currently being held at training center locations around the country: • To launch a Web-Based Training (WBT) course, click the WebBased Courses link to view the catalog and select a specific course. Course Number Course Name S-AC07-02.01ILT Automotive Air Conditioning: Advanced Refrigerant System Diagnostics S-AC07-03.01ILT HVAC Control System Operation and Diagnostics • To launch a TechAssist (TAS) course, click the TechAssists link to view the catalog and select a specific course. S-BK05-01.01ILT Braking Systems S-BK05-02.01ILT ABS Operation and Diagnosis • To launch a Simulation (SIM), click the Simulations link to view the catalog and select a diagnostic challenge simulation. S-EL06-04.02ILT Network Communication Diagnosis S-EL06-10.02ILT Electrical Power Management S-EL06-11.01ILT Automotive Electrical Circuit Diagnosis and Repair To search for currently scheduled courses, click the Schedule link. Select search terms from the dropdown menus and click the Submit button S-EL06-11.02ILT Enhanced Automotive Circuit Diagnosis S-EL06-12.01ILT Hybrid Technology and Service S-EL06-13.01ILT Body Electrical: Global Diagnostics Current Virtual Classroom Training S-EL06-14.01ILT Advanced Body Control System Electrical Diagnostics S-EP08-02.01ILT Engine Performance: Computer Controls and Ignition System Diagnostics S-EP08-03.01ILT Engine Performance: Air Induction and Fuel System Diagnostics Training Schedule The following VCT courses are currently being scheduled: Course Number Course Name FVCT1.09V How to Use VCT (Prerecorded) S-EL06-01.01VCT Electrical Circuit Function and Diagnosis S-EL06-02.01VCT Testing Electrical Signal and Control Circuits S-EP08-04.01ILT Engine Performance: Fault Monitoring and Emission System Diagnostics S-EL06-03.01VCT Serial Data Communication Networks S-EP08-05.01ILT Engine Performance: Advanced Drivability Diagnostics S-EL06-04.01VCT Communication Network Diagnosis S-EP08-81.01ILT S-EM01-01.01VCT Camshaft Position Actuator Systems Duramax 6600: Diesel Engine Performance S-EM01-02.01VCT Active Fuel Management Operation S-EP08-81.02ILT Duramax Diesel Operation and Diagnosis S-EM01-03.01VCT Active Fuel Management Diagnosis S-SS04-01.01ILT Vibration Correction Diagnostics S-SS04-01.01VCT Advanced Steering System Diagnosis S-ST10-01.01ILT Supplemental Restraint Systems Cold Weather Driving Tips You wouldn't head out into cold weather without bundling up. Drivers need to be prepared on the road too when temperatures drop. • Keep a heavy-duty ice scraper and snow brush in your vehicle. Snow or ice covering the vehicle’s windows can obstruct the driver’s view. Also brush snow from headlamps and taillamps to help others see your vehicle. • Cold weather reduces tire pressure, so check tire pressure often. The proper tire pressure for a vehicle is usually found on a decal in the driver’s door jamb. See your owner's manual for tire inflation directions and details. • Check for worn wiper blades. Cold temperatures can make blades brittle, and ice on the windshield can cause nicks in the blades, decreasing performance. TS-PU-0018-10 • If planning a trip, take a blanket, extrawarm clothing, a collapsible shovel, a bag of road salt and an extra bottle of windshield-washer fluid. • Put on snow tires if driving in major snow-belt areas. Check your vehicle's owner's manual for details and recommended practices. These cold weather tips as well as others for driving, vehicle maintenance, and vehicle troubleshooting can be found on www.acdelco.com. The vehicle tips are one more reason for consumers to visit www.acdelco.com. While there, they can also look up ACDelco parts information and search for a local independent service center. – Thanks to Mike DeSander 8
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