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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 16, 2009
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Open Help Requests for GM
Help Request Answers
1997 Cadillac DeVille 4.6L No Start
this shop got in this north star cadi... car was driven in with blown head gasket..cust. opted to replace motor with used one..shop replaced and drove for test drive. all seemed good. once got back to shop the engined died.. engine would turn over but not star...
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y1W
need some thoughts on this one. has had 2 sets of ckp sensors in it for intermittent no start previously, now it will not start, i have both ckp pulses, cmp pulse, spark, fuel pressure, battery voltage at injectors and no injector pulse. no dtcs present at thi...
2000 Cadillac DeVille 4.6L spark plugs VIN: 1G6KD54Y4Y
Hello, Iam trying to change plugs on my sons car.Left it with me for afternoon to cool off. Changed front bank fine. Cannot get coil pack off back, am I missing something or do they melt on. What is the recomended procedure. thank you all
1998 Chevrolet C1500 Cheyenne 4.3L Surge, Misfire VIN: 1GCEC14W9W
The customers complaint is that the truck will buck and jerk and feel like it wants to quite. On a test drive it only acted up once and it won't act up again. The cap and plugs are ok. The fuel pump and filter are ok. Does anyone have any ideas, Mike Trouble codes: P0300 (Multiple Missfire)
2001 Chevrolet Impala LS 3.8L No Start, MIL Lamp on VIN: 2G1WH55K01
HI out there I am in need of help from you gm tecs or pcm networking tecs out there this is the kind of challenging we all love to figure out but pull are hair out trying to fix it this car comes to me from another shop that has spent 3 or so weeks on and has ... Trouble codes: U1000 (data line), U1016 (loss of pcm data line), P1631 (theft code)
2003 Chevrolet Impala 3.4L headlights VIN: 2G1WF52E03
hey guys,this baby is trying to mess up my weekend.if anybody had this problem help me out please!!i just started to work in this new place and we do not have any software yet!!so i cant get any diagrams for this headlights.thanks.
2003 Chevrolet Tahoe LT 5.3L Stall, MIL Lamp on VIN: 1GNEC13Z33
Why is it that family always have the biggest problem vehicles?My Niece call me to come look at her Tahoe,said the ABS light came on while she was sitting in the Tahoe Talking on the phone with her foot on the brake,then when she took off it stall,when restart... Trouble codes: P1518 (Throttle Actuator Control Module Serial Data Malfunction)
2006 Chevrolet Corvette Z06 7.0L code 315 VIN: 1G1YY26E26
I recently replaced the ECM on my 2006 ZO6 , and am getting a failure to calibrate camshaft sensor code ,The gentleman that sold me the ECM , states he is just a progammer , and does not know off the top of his head how to calibrate the sensor to the ECM , but... Trouble codes: 315 (camshaft position sensor not calibrated)
2001 GMC Sierra 2500 SL 6.0L Poor Idle Quality, Misfire, MIL Lamp on, low power VIN: 1GTGK29U31
Hello all, thank you in advance for any help I may recieve. This truck is a tough one. Truck runs perfect most of the time, every once in a while, twice in the last 2 days we have had the vehicle, it will start running rough and the CK eng light flashes with t... Trouble codes: 300 (Random misfire)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Century Custom 3.1L steering shaft? VIN: 1G4AG55M7T
Thank you for all of the replies. I have concluded that the noise must be the rack and pinion input shaft seal squeaking against the input shaft. I raised tires off of ground , engine running, still had noise. Removed serp belt , noise gone. I guess with engin...
2002 Cadillac DeVille 4.6L power window VIN: 1G6KD54Y52
I ran out of time, I didn't get this car fixed in the 2 weeks I was helping out at this other shop I ran for a couple of weeks. I think that the instrument cluster may be the problem since the databus wires go through it. The battery light just stayed on whi...
1998 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC19R3W
I'd like to thank all the techs who responded to this request and I appreciate all the input. Most of my experience with lean codes is on Ford trucks and the newer GM 5.3 engines, almost always vacuum leaks from one source or another. After resealing the intak... Trouble codes: P0171 (Lean bank 1), P0174 (Lean bank 2).
2003 Chevrolet Tahoe LS 4.8L starter VIN: 1GNEC13VX3
thanks to all who responded. it turned out to be bad pcm. i just barely thumped it with my little finger and i heard the fuel pump prime then it started. new pcm did it. thanks again steve.
2003 Chevrolet Trailblazer North Face 4.2L Misfire, MIL Lamp on VIN: 1GNDT13S63
Unfortunately,did not fix this one. Customer is tiring of the constant problems on a fairly new,low mileage truck and swears he won't put another dime in it,for now. A few responses, 1), boot/plug problems, I don't think so,new coil came with new boot and new... Trouble codes: P0301.
2004 Chevrolet Astro 4.3L abs VIN: 1GNEL19X24
It is a FIX,it turned out to be a lot of rust causing a big air gap.I order 2 AC Delco front HUB and the false ABS activation is gone.All of you were RIGHT,thanks to all for the great help that some times we all need .THOMAS
2006 Chevrolet HHR LT 2.4L lock cylinder/key VIN: 3GNDA23P66
Thank you to Dennis, Robert, Mike, Scott, Bill [...]. for their quick replies. The consensus said to replace the shifter. This took care of the problem! Like everybody said, a poor design. Happy Wrenc...
2003 GMC Envoy XL SLT 5.3L engine temp VIN: 1GKET16P73
hi all and thanks for the help sorry it took so long but my buddy finally got back to my shop. seems the truck never had a tow package installed. put in an aftermarket trans cooler with fan and problem solved. happy motoring and boating for him, and a huge tha...
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