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GMTRUCKTECH

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About GMTRUCKTECH

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  • Birthday 12/03/1974

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  1. hey man thanks for the diagnosis i will take it to the dealer to get updates soon. this should help things

  2. If your truck is missfiring as bad as you say it would certainly set a missfire code or show missfires on each cyn with tech-2 data. Anyways here is a bull on rough idle and other driveability concerns see if your local dealer will perform this bull it MAY help. Subject:Various Driveability Symptoms Due to Clogged Fuel Injectors, MIL/SES DTCs P0171, P0172, P0174, P0300, P1174, P1175 (Clean Fuel Injectors and/or Perform Injector Test With AFIT - CH-47976) #03-06-04-030F - (12/10/2007) Models:2000-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn) 2003-2008 HUMMER H2 2006-2008 HUMMER H3 2005-2008 Saab 9-7X with 2.0L, 2.2L, 2.4L, 2.8L, 3.1L, 3.4L, 3.5L, 3.8L, 3.9L, 4.2L, 4.3L, 4.8L, 5.3L, 6.0L, 6.2L or 8.1L Engine (VINs X, F, D, 4, 5, T, 8, J, E, H, L, 6, K, 1, 2, R, W, S, X, V, T, M, N, U, H, Y, 8, G -- RPOs LNF, L61, LN2, L43, LD9, LK5, LG8, LA1, LX5, LX9, LZ4, LZE, L52, L36, L67, L26, LZ9, LZ8, LGD, LL8, LU3, LR4, LM7, LH6, LQ9, LQ4, LS2, L76, L92, L18) and MULTEC® 2 Fuel Injectors This bulletin is being revised to update the model year to 2008. Please discard Corporate Bulletin Number 03-06-04-030E (Section 06 -- Engine/Propulsion System). <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss1-2043811"> Condition Some customers may comment on any of the following various driveability symptoms: • Extended Crank Time • Hard to Start • MIL/SES Illuminated with DTCs • Hesitation • Lack of Power • Surge or Chuggle • Rough Idle • Light or Intermittent Misfire <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss2-2043811"> Cause Due to various factors, the fuel injectors may become restricted. Extensive testing has demonstrated that fuel related issues are the cause of clogged injectors. At this point, no specific fuel, fuel constituent, or engine condition has been identified as causing the restriction. The restriction causes the engine to operate at a lean air fuel ratio. This may either trigger the MIL to illuminate or the engine to develop various driveability symptoms. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss3-2043811"> Correction Fuel injector restrictions, deposits can be cleaned on the vehicle using the following procedure. Under NO circumstances should this procedure be modified, changed or shortened. As a long term solution, and to prevent reoccurrence, customers should be encouraged to use Top Tier Detergent Gasoline . For further information on Top Tier detergent gasoline and fuel retailers, please refer to the following Corporate Bulletin Numbers: • 04-06-04-047G (U.S. Only) • 05-06-04-022D (Canada ONLY) Notice: GM UPPER ENGINE AND FUEL INJECTOR CLEANER is the only injector cleaning agent approved for use with General Motors fuel system components. Other injector cleaners may cause damage to plastics, plated metals or bearings. General Motors has completed extensive laboratory testing of GM Upper Engine and Fuel Injector Cleaner, and can assure its compatibility with General Motors fuel system components, as long as the cleaning procedure is followed correctly. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss4-2043811"> Injector Cleaning Procedure The following tools, or their equivalent, are required: • CH-47976 Active Fuel Injector Tester (AFIT) • J 35800-A Fuel Injector Cleaner • J 37287 Fuel Line Shut-off Adapter • J 42964 Fuel Line Shut-off Adapter • J 42873 Fuel Line Shut-off Adapter • * One bottle of GM Upper Engine and Fuel Injector Cleaner, P/N 88861802 (in Canada, P/N 88861804) • * One bottle of GM Fuel System Treatment Plus, P/N 88861011 (in Canada, P/N 88861012) <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss5-2043811"> Active Fuel Injector Tester (AFIT- CH-47976) Some dealers may not have an Active Fuel Injector Tester (AFIT- CH-47976). Dealers can contact 1-800-GM-TOOLS (1-800-468-6657) to order an AFIT- CH-47976. Dealers still can test the fuel injectors without an AFIT. Refer to Fuel Injector Diagnosis (w/ J 39021 or Tech 2®) in SI. Important: As mentioned in the AFIT User Guide, vehicles that are not listed in the AFIT menu can still be tested with the AFIT. Depending on the model, it may be possible to enter the previous model year and proceed with testing using the DLC connection. If this is not possible on the model that you are working on, it will be necessary to use the direct connection method outlined in the AFIT User Guide (See Pages 17-31). General Motors recommends that the Active Fuel Injector Tester (AFIT) be used in testing fuel injectors. If the SI diagnostics do not isolate a cause for this concern, use the Active Fuel Injector Tester (AFIT - CH-47976) to perform an "Injector Test" as outlined in the AFIT User Guide. The AFIT "Injector Test" measures the flow characteristics of all fuel injectors, which is more precise when compared with the standard Tech 2® fuel injector balance test. As a result, the AFIT is more likely to isolate the cause of a P1174 DTC (for example: if it is being caused by a fuel injector concern). The CH-47976 (Active Fuel Injector Tester - AFIT) can also be used to measure fuel pressure and fuel system leak down. Also, as mentioned in the P1174 SI diagnosis, if the misfire current counters or misfire graph indicate any misfires, it may be an indicator of the cylinder that is causing the concern. Refer to Fuel Injector Diagnosis (w/CH-47976) in SI for additional instructions. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss6-2043811"> Training (U.S.) To access the training video on AFIT, take the following path at the GM Training Website: <LI type=1>After logging into the gmtraining.com website, choose the link on the left side of the page titled "web video library." <LI type=1>Then choose "technical." <LI type=1>Next, within the search box, type in September course number "10206.09D. <LI type=1>This will bring up a link with this course. Scroll through to choose "feature topic." At this point, the seminar can be chosen to view or the video related to the AFIT. Additional training is available from the gmtraining.com website. Please see TECHassist 16044.18T2 Active Fuel Injector Tester and also see 16044.14D1 GM Powertrain Performance for more information on GM Upper Engine and Fuel Injector Cleaner. Also, dealers can now download software updates for the AFIT at GM Dealer Equipment (GMDE) on the web at http://www.gmde.net/AFIT.cfm. Training (Canada) To access the training video on AFIT, take the following path at the GMPro LMS Training Website: <LI type=1>After logging into the <www.gmprocanada.com> website, choose the link on the left side of the page titled "Catalog." <LI type=1>Then choose "Catalog Search." <LI type=1>Next, within the search box, Select Course Number - Contains - "T" then select search. <LI type=1>This will bring up a list of TECHassist courses. Scroll through to choose "Active Fuel Injector Tester" and select "View." At this point, a new window will open and the program can be Launched. Also, dealers can now download software updates for the AFIT at GM Dealer Equipment (GMDE) on the web at http://www.gmde.net/softwareupdates/. Techlink Additional information can be found on AFIT (June 2006 Edition) and GM Upper Engine and Fuel Injector Cleaner (November 2006 Edition) in Techlink. To access the articles, take the following path: <LI type=1>Go to GM DealerWorld (U.S.) or the GM infoNET (Canada). <LI type=1>Click on the Service Tab in DealerWorld (GM infoNET for Canada). <LI type=1>Click on the GM Techlink Hyperlink. Click on the Archives Hyperlink at GM Techlink. • Click on 06-2006 in the Archives Section and Click on the Active Fuel Injector Tester Link in the June 2006 Techlink Article. • Click on 11-2006 in the Archives Section and Click on the GM Top Engine Cleaner Replaced Link in the November 2006 Techlink Article. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss7-2043811"> Injector Cleaning Procedure Notice: GM UPPER ENGINE AND FUEL INJECTOR CLEANER is the only injector cleaning agent recommended. DO NOT USE OTHER CLEANING AGENTS AS THEY MAY CONTAIN METHANOL, WHICH CAN DAMAGE FUEL SYSTEM COMPONENTS. Under NO circumstances should the GM Upper Engine and Fuel Injector Cleaner be added to the vehicle fuel tank. Do not exceed the recommended cleaning solution concentration. Testing has demonstrated that exceeding the recommended cleaning solution concentration does not improve the effectiveness of this procedure. Important: Vehicles with less than 160 km (100 mi) on the odometer should not have the injectors cleaned. These vehicles should have any out of specification injectors replaced. <LI type=1>For 4, 5 and 6 cylinder engines, empty two of the 30 ml (1 oz) reservoirs of the GM Upper Engine and Fuel Injector Cleaner container into the J 35800-A - Injector Cleaning Tank then add 420 ml (14 oz) of regular unleaded gasoline. If you are using any other brand of cleaning tank, you will need a total of 60 ml (2 oz) mixed with 420 ml (14 oz) of regular unleaded gasoline. <LI type=1>For 8 cylinder engines, empty two of the 30 ml (1 oz) reservoirs of the GM Upper Engine and Fuel Injector Cleaner container into the J 35800-A - Injector Cleaning Tank then add 420 ml (14 oz) of regular unleaded gasoline. If you are using any other brand of cleaning tank, you will need a total of 60 ml (2 oz) of Upper Engine and Fuel Injector Cleaner mixed with 420 ml (14 oz) of regular unleaded gasoline. This procedure will need to be repeated for a second time for an 8 cylinder engine (8 cylinder engines receive 960 ml total fluid - 120 ml (4 oz) of Upper Engine and Fuel Injector Cleaner and 840 ml (28 oz) of gasoline. <LI type=1>Be sure to follow all additional instructions provided with the tool. <LI type=1>Electrically disable the vehicle fuel pump by either removing the fuel pump fuse or the fuel pump relay and disconnecting the oil pressure switch connector, if equipped. <LI type=1>Turn the ignition to the OFF position. <LI type=1>Relieve fuel pressure and disconnect the fuel feed and return lines at the fuel rail. Plug the fuel feed and return lines coming off the fuel rail with J 37287, J 42873 or J 42964 as appropriate for the fuel system. <LI type=1>Connect the J 35800-A to the vehicle fuel rail. <LI type=1>Pressurize the J 35800-A to 510 kPa (75 psi). <LI type=1>Start and idle the engine until it stalls, due to lack of fuel. This should take approximately 15-20 minutes. <LI type=1>Turn the ignition to the OFF position. <LI type=1>Disconnect the J 35800-A from the fuel rail. <LI type=1>Reconnect the vehicle fuel pump relay and oil pressure switch connector, if equipped. <LI type=1>Remove the J 37287, J 42873 or J 42964 and reconnect the vehicle fuel feed and return lines. <LI type=1>Start and idle the vehicle for an additional two minutes to ensure residual injector cleaner is flushed from the fuel rail and fuel lines. <LI type=1>Pour the entire contents of GM Fuel System Treatment Plus (P/N 88861011 [in Canada, P/N 88861012]) into the tank and advise the customer to fill the tank. <LI type=1>Review the benefits of using Top Tier Detergent gasoline with the customer and recommend that they add a bottle of GM Fuel System Treatment Plus to the fuel tank at every oil change. Regular use of GM Fuel System Treatment Plus should keep the customer from having to repeat the injector cleaning procedure. Road test the vehicle to verify that the customer concern has been corrected. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss8-2043811"> Parts Information Part Number Description Qty 88861802 GM Upper Engine and Fuel Injector Cleaner 473 ml (16 oz) Container (U.S.) 1* 88861804 GM Upper Engine and Fuel Injector Cleaner 473 ml Container (Canada) 1 88861011 Fuel System Treatment Plus 591 ml (20 oz) Container (U.S.) 1 88861012 Fuel System Treatment Plus 591 ml Container (Canada) 1 * Only 1/8 of the cost may be claimed for 4 and 6 cylinder engines and 1/4 of the cost for 8 cylinder engines. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss9-2043811"> Warranty Information (excluding Saab U.S. Models) For vehicles repaired under warranty, use: Labor Operation Description Labor Time *J5645 Cleaning Injector: 4 Cylinder Engine 0.8 hr 5 Cylinder Engine 0.7 hr 6 Cylinder Engine 0.7 hr 8 Cylinder Engine 0.9 hr **Add: Diagnostic Time 0.0-0.3 hr * This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide. **A total diagnostic time equal to the time allowed for cleaning, J5645, may be claimed for performing the injector diagnosis procedure. <A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2043811&pubid=1844&evc=sm#ss10-2043811"> Warranty Information (Saab U.S. Models) For vehicles repaired under warranty, use: Labor Operation Description Failed Object Fault/Reason Code Location Code Warranty Type Repair/Action Code Labor Time 2421101 Injector, Replace Engine Code S 24211 71 0 01 01 Use Published Labor Operation Time 2421102 Injector, Replace Engine Code M 24211 71 0 01 01 Use Published Labor Operation Time Add 1002001 Diagnostic Time -- -- -- -- -- Use Published Labor Operation Time 2421105 Cleaning Injector, 6 Cylinder Engine 24211 71 0 01 05 0.7 hr* 2421106 Cleaning Injector, 8 Cylinder Engine 24211 71 0 01 05 0.9 hr* GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these 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, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION © Copyright General Motors Corporation. All Rights Reserved. Document ID# 2043811 2008 Chevrolet Chevy Suburban - 2WD
  3. I must replace a evap solenoid every day I work piece of crap! In the general's defense I work on alot of fleet vecs that work in dusty conditions. Still crap!
  4. THERE IS A ISSUE WITH THE THE MODULE THAT CONTROLS AUTO AIR RIDE. THERE IS A UPDATE FOR THE MODULE SO YOU WILL HAVE TO BRING IT TO THE DEALER AND HVAE IT UPDATED. I HAVE SEEN THE UPDATE FIX THE SYSTEM AND OTHER TIMES I HAVE HAD TO REPLACE THE MODULE IT'S A 50 50 SHOT. GOOD LUCK
  5. YOUR VEC. HAC ELECTRONIC THROTTLE BODY UNIT SO IT USES VOLTAGE SIGNALS TO CONTROL THROLLTE BLADE IN THE THROTTLE BODY. WHAT I HAVE SEEN ON THE JOB IS A FEW DIFFERENT ISSUES THAT CAN CAUSE THIS PROBLEM. FIRST OFF THERE IS A UPDATE FOR THE PCM TO ADDRESS THOSE CODES, BUT YOU WILL HAVE TO TAKE IT TO THE DEALER FOR THAT. SECOND THERE IS ISSUES WITH THE ACTUATOR ON THE THROTTLE BODY BINDING UP AND CAUSING THE CODES. THIRD THERE IS A YELLOW WIRE COMING OFF THE THOTTLE BODY CONNECTOR THAT BREAKS INSIDE INTERNALLY AND CANNOT BE SEEN TO THE NAKED EYE. THE BEST WAY TO TEST THAT IS TO GRAB THE WIRE ABOUT 5 INCHS FROM THE CONNECTOR AND TUG IF IT FEELS SPONGY OR BREAKS THATS YOUR PROBLEM. fOURTH THERE IS A GROUND AT THE BACK OF THE PASS. SIDE HEAD THAT BECOMES LOOSE. WHEN I GET ONE OF THESE VEC.S IN MY SHOP I UPDATE THE PCM REPLACE THE THROTTLE BODY UNIT AND CONNECTOR TO IT AND CHECK THE GROUND ON THE BACK OF THE HEAD IF I DON'T DO ALL OF THIS THAT BITCH SEEMS TO ALWAYS COME BACK. GOOD LUCK
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