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Professional Automotive Repair Technical Discussions for July 25, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2011 Buick LaCrosse CXL 3.6L Reduced power VIN: 1G4GC5ED0B A few weeks ago the vehicle came in with a set of codes for Accelerator Pedal Position signal correlation and reduced engine power. We reset the codes, tested checked input/output voltages at the assembly, eventually got the code to set again while using it, a... Trouble codes: P2138 (Accelerator pedal position sensor 1-2 implausible), U1007, U1400, U1407, C2420, U2540 |
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| 2008 Cadillac CTS 3.6L Mechanical VIN: 1G6DG57798 Car came in with excessive engine noise, sounded like a rod Bearing. Customer shut engine off, went to start and was making noise, He checked oil and was 3 qts low. No oil or warning lite came on. I scanned and found Multiple Codes for Cam timing. (P0014, P002... |
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| 2008 Chevrolet Silverado 2500 HD LTZ 6.0L Windshield Washers VIN: 1GCHK23K18 help please. the customer complaint is at times the w/shield washers come on by themselves and will empty the WSW. fluid no bcm codes. can run output test thru bcm. ok there. looking at wiring diagram. shows front washer relay in underhood relay center. it,s n... |
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| 2002 GMC Sierra 3500 6.6L pressure VIN: 1GDJC34162 Came in last week with high side switch on back of compressor blown out, not the snap ring, but the plastic blown out. Remove compressor, looked all over for connector, can't find connector for high side switch on compressor. Plastic end of blown out switch lo... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2006 Buick LaCrosse CX 3.8L No communication VIN: 2G4WC582X6 I and 2 tech help websites are giving up. I have done everything suggested. I even ran a data line right from the pcm to the aldl with nothing else on it ans still could not communicate. I never thought I would say I give up but I have no where else to go. Tha... |
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| 1999 Cadillac Eldorado ETC 4.6L Misfire, MIL Lamp on VIN: 1G6ET1290X customer took car to Cadillac to dealer unresolved Trouble codes: P0300, P0305. |
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| 2009 Cadillac Escalade EXT 6.2L Software VIN: 3GYFK22209 It's a little complicated so I not going to explain how to do it, but TIS2Web does work with windows 10. I was able to get it loaded on my computer, works fine. |
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| 1999 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDT13W8X Took head off and number 2 exhaust valve receded into head causing valve not to seal. Head is off to the machine shop. Trouble codes: P0304. |
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| 2007 Chevrolet Tahoe LTZ 5.3L cylinder 6 AFM VIN: 1GNFK13037 The shop received an okay to repair as cheap as possible and opened up the engine to find that only the intake valve was losing its lift and only after oil pressure rose during cranking or running. They then removed the head and found the lifter was rotating d... |
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| 2010 Chevrolet Traverse LT 3.6L Engine VIN: 1GNLVFED5A We gave the customer 2 options, tear down further to determine the cause or just replace the engine. Thanks for the input on this one everyone. I know it seemed pretty straight forward but I like to get other peoples opinions sometimes, |
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| 2000 Pontiac Montana 3.4L Hesitation, Surge, Cuts out, Stall, Backfires VIN: 1GMDX03E1Y Ok so heres a good one. It turned out the harness leading from the crank sensor to the ignition module was bare part way up and the wires were touching each other. The only thing that I dont understand is why didnt it show up as a crank sensor problem. Oh well... |
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