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Prev Professional Automotive Repair Technical Discussions for January 25, 2011
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Tahoe 5.7L Electronic VIN: 1GNEK13R0X
I have a 99 tahoe that is setting a P0740 code: Converter clutch silniod circiut open fault. I have replaced the silnoid still still no change. I read in the fix that a n ingition swicth had caused thees faults so we replaced the switch. Still code repeats as ...
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2002 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29UX2
I need help, we have a 02 30k mile truck, misses on cylinders 3&4, injector pulse good, spark is good, spark plugs fairly new and not gas fouled. We have found some bulletins related to intake internal leaks, but need a test for an internal leak that might onl... Trouble codes: P0300 (Random misfire)
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2005 Chevrolet Express 2500 4.8L Theft Dterrent VIN: 1GCGG25V95
No start after axle mechanical repairs as listed. Engine will crank and start, runs for a couple of seconds and quits. Fuel pressure constant at 62psi. Has spark when cranking. Loses injector pulse. Voltmeter pegs at minimum when key turned on and rises from p...
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2005 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13T65
First time customer. Bear with my long windedness. just want to make sure I am thoroughly diagnosing this problem Car runs rough at idle and is in fact misfiring. Trouble code p0300 is the only code showing up. I accessed misfire data and about four cylinders ... Trouble codes: P0300 (Random misfire)
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1998 GMC K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 3GKFK16R2W
have a misfire on no 5 cyl have tried new injector new plug new wire also replaced intake gskt has good compression ck valve adjustment ck fuel pressure did injector test ok at wits end also looked at valves when intake was off no build up to speak of misses o...
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2003 GMC Yukon Denali XL 6.0L No heat VIN: 1GKFK66U43
Ok so heres why ive got a headache...Thank you all in advance! Ive got this 03 gmc yukon xl 6.0l that has an issue with the heat. The cusomer orginally brought it in for a coolant flush..so we went ahead and flushed out the old junk and in with the new stuff. ...
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2001 Oldsmobile Aurora 4.0L Dome Light VIN: 1G3GS64C11
Customer complains dome lights never work. He had previously changed DIM fuse #38. Also found #14 DIMR (10A) blown, replaced both with correct amp & verified power on both sides of fuse, no other blown fuses, other systems operate, no other problems. purchased...
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2002 Pontiac Bonneville SE 3.8L Unknown VIN: 1G2HX54K92
Hi and thanks for your consideration of my help request. This car has a problem with not cranking about once every 2 weeks the owner says. I have not been able to duplicate the symptom in 3 visits to my shop. They say that when it occurs as you try to start t...
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1994 Saturn SL2 1.9L ABS Master Cyl VIN: 1G8ZK557XR
Hello from Minnesota! I am in the process of changing a master cylinder on a 94 Saturn SL2 with 4 wheel disk brakes. This is one of those units where the master cylinder is physically attached to the ABS unit. When I took the bottom of the ABS unit off the thr...
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2000 Saturn LS2 3.0L Oil Cooler VIN: 1G8JW52RXY
Hi all, This saturn came in with a over heat issue. After refilling the cooling system and running it a while I found oil had entered the cooling system. I have the ok to replace the oil cooler on it. I have personally never dug into one of these engines and w...
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Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac Escalade ESV 6.0L Traction control VIN: 3GYFK66NX3
Sorry about that thought I closed this request.The customer could not wait any longer type this up once guess I hit the wrong button and it didn't close.Sure it was a ABS sensor falling out at low speeds.
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2003 Chevrolet Silverado 2500 HD 6.0L steering & b VIN: 1234567891
i replaced stering box on this one found chassis all cleaned off at top seal. leaked out when plowing turning full & brakeing all at the same time thanks everyone for all the input bob
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2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29183
Thank you everyone for resounding. Of course the repair est. Is way up there. The customer is thinking about what to do at this time. This truck was full of bugs. We have never had this many problems with a Duramax before. Mitchell does not cover it very well ...
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2005 Chevrolet Silverado 2500 HD LS 6.6L Hesitation, Stall, MIL Lamp on VIN: 1GCHK23225
Well, I checked and installed silicone grease on the 2 large engine connectors Clyde mentioned. I released it to the customer for trial, and so far no issues. I'm calling it fixed! I did not see any visible issues on these connectors, but who knows? Thanks to ... Trouble codes: P0101, P0102, P0299 (turbo underboost), P0401 (Insufficient EGR flow), P2563 (Turbo boost control sensor performance), U0105 (Lost comm with FICM).
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2006 Chevrolet Tahoe LT 5.3L Electronic VIN: 1GNEK13T16
After double checking all voltages and inputs, found airtemp door to be over travelling to the full cold position, actuator position showed 5 volts. Rear HVAC Module loses control at 4.8 volts. Replaced upper half of rear hvac module, recalibrated doors. Te...
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2008 Chevrolet Trailblazer LT 4.2L Liftgate, RKE, interior lights VIN: 1GNDT13S08
Once again, another case of "don't overlook the basics" Mike in PA was the winner on this repair with 5 broken wires at liftgate flex-joint. I tested power at the fuse block, but not the modules themselves. When I tested power & grounds at the LGM, there was...
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2003 GMC Sierra 2500 HD 6.6L Starter VIN: 1GTHC29143
Thanks to all of those who helped, I isolated the start timer & ECM circuits & went right to the starter, I still had the problem but only in one spot in the flywheel. I cleaned all grounds & cleaned the starter connections, they were quite corroded for such ...
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2007 GMC Sierra 1500 WT 5.3L battery VIN: 1GTEK19J57
Thanks for the good information again! I never dreamed that this might be an ondemand charging system or that it was controlled by the computer. The alternator fixed it and the customer has been using the truck for 2 weeks now and is happy.
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2004 Pontiac Grand Am SE 2.2L Starting VIN: 1G2NF52E94
Thank you for all the help it turned out to be control module.Genuine GM part was the cure.Lesson learned on this one
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