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Prev Professional Automotive Repair Technical Discussions for December 28, 2007
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Open Help Requests for GM
Help Request Answers
1992 Cadillac Seville 4.9L head bolt VIN: 1GGKS53B2N
this old caddy had overheating problem from headgasket leaking,on replacement 4 out of 6 inner head bolt threads pulled out of block.i believe cadillac had tools to replace threads and local dealer would probably let me use them if i can come up with info on t...
1994 Chevrolet K2500 Cheyenne 5.7L Excessive Emissions VIN: 1GCGK29K8R
This vehicle has a problem that has me baffled - at idle and also at tip-in throttle conditions when watching the amerage signal on the injectors, you can hear a tick,,,tick,,,tick(not rhythmic, at random) and when you hear this VERY slight sound you get a spi...
2001 Chevrolet Impala 3.8L rack? VIN: 2G1WF55KX1
hi fellow techs, got a problem diagnosis here. high effort required to turn wheel at idle after brief warmup period. marginal situation-disconnect either tierod and effort ok, increase engine speed by 200 rpm and effort ok.pump whines a bit , fluid quality not...
2003 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T83
check for spark ok . check for external vaccum leaks, long fuel trim 50% bank one . 25% short fuel trim , ran pid data bank 2 within perimeters. have random misfire po300 perimeter count flags 1,3,5,7 . Trouble codes: P0300 (misfire 1357), P0171 (bank 1 of 1 o2 sensor not with data perimeters)
2004 Chevrolet Silverado 1500 5.3L Mechanical VIN: 2GCEK19TX4
Vehicle came in with very loud ticking very similar to the first time. Oil level, pressure and appearance is very good. Noise goes away after engine is warm. Suspect lifter and camshaft failure. Has anyone had similar failures with this engine? This vehicle be...
1992 Pontiac Grand Prix SE 3.1L Poor Idle Quality, Stall, MIL Lamp on VIN: 1G2WJ14T1N
hello group car came in idling very rough,10 inches of vac.,stuck a rag in throttle body,idle came to normal 16 inches of vac. found intake leakin and broken plastic vaccum lines.after repairs,engine dies when covering throttle body.engine idles rough for a w... Trouble codes: 35 (iac problem), 33 (map high)

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal 3.1L Poor Idle Quality, Hesitation, Stall VIN: 2G4WB54TOM
okay, first off thank you guys for all the help. You guys gave me alot of good ideas. I replaced the pcm and the motor started to stay idled all the time. I did have a small misfire so i did a tune up on it. It runs great, idles fine. So thanks for all the goo...
1996 Chevrolet Blazer 4.3L Transmission shift VIN: 1GNDT13W7T
Sorry to waste your time. I thought that the customer was behind me on this repair. He pulled the plug, and took it home for now. I hope that the replies I got, can help someone else out in there quest to repair a similar problem. Thanks again
1998 Chevrolet K2500 Cheyenne 5.7L No Start, Cuts out VIN: 1GCGK24R6W
Sorry this one took so long to post. We had a lot of very helpfull replies. First we did verify that the relay the customer installed was correct and functional. We then cheched over the connections at the pump and that's where we found our problem. The te...
1999 Chevrolet Astro 4.3L No Start VIN: 1GBDM19WXX
Finally got the Astro running. After triple checking myself, had another VCM flashed with same results. Went to a 4.3 pulled out of an s10 Blazer and started swapping good known parts and after switching cam sensor, all was good. Put original back and no st...
2001 Chevrolet Impala LS 3.8L fuel leak VIN: 2G1WH55K61
First I tried to remember to thank each person for their help. All most all said they had used the Dorman kit. I bought the dorman fuel line repair kit 800-300. I had lots of trouble with it doing the 90 deg fitting on the car...
2002 Chevrolet Silverado 1500 HD LS 6.0L MIL Lamp on VIN: 1GCGK13U02
Well this one is fixed. Thanks Mike, Paul, Lynn. I did a crank relearn and the misfire codes went away. Hard to think that would cause a P0 300 and run perfect. Fuel trims were perfect and no vac leaks. Thanks to all who replied. Kevin Trouble codes: P00, 300 (random misfire).
2003 Chevrolet Cavalier 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JC12F93
the head was removed and we found the exhaust valves on cyl number 4 were sticking in the guides reamed the guides and cleaned the valves works fine now Trouble codes: P0300.
1995 GMC C2500 Sierra SL 6.5L Cuts out, MIL Lamp on VIN: 2GTFC29S8S
decided on injector pump replacement. have been waiting for approval for too long. don't expect that customer is going to authorize repairs. thanks for the help guys. Trouble codes: 33 (egr pressure or baro sensor circuit high), 35 (injector pulse width too short), 36 (injector pulse width too long), 44 (egr pulse width modulation error), 57 (5 volt reference short), 62 (turbo boost sensor circuit low 78 wastegate circuit fault).
2000 GMC C6500 7.4L MIL Lamp on VIN: 1GDJ7H1D5Y
I finally got hold of some genuine gm info on installing the cam sensor. this is basically a distributor with no cap & rotor. the instructiones said to align the mark on the lower gear with the mark on the lower dist. housing, but that last mark didn't exist. ... Trouble codes: P0336 (ckp sensor out of range).
2002 GMC Sierra 1500 SL 4.3L airbag light VIN: 1GTEC19W92
2001 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NF52T71
Well, I received many responses stating that only AC Delco plugs should be used due to the varying resistances of aftermarket plugs. Also, the ground strap under the cover was in place as some of you said to check. Ignition coils were also mentioned as a pos... Trouble codes: P0300.
2001 Saturn SC1 1.9L idles at 1800 rpms VIN: 1G8ZN12811
Well here is what it boiled down to. We cleaned the throttle body and replace coolant temp sensor. The customer also requested that we replace the tps as well. With all the sensors and the throttle body service the customer says all is well so far. I personall... Trouble codes: P0442, P1599, U1301.
2002 Saturn L100 2.2L Misfire, MIL Lamp on VIN: 1G8J554F62
thank for all your reply body i check injtor #2 ok,i swap coil from a another car on the father's car and run great now i replace coil pack and run like a champ thank again boy nice holiday Trouble codes: P0302.
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