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Prev Professional Automotive Repair Technical Discussions for May 15, 2009
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Open Help Requests for GM
Help Request Answers
1989 Buick Reatta 3.8L Excessive Emissions VIN: 1G4EC11C0K
I have been testing this vehicle for two days now, here is what I have found so far. Engine running extremly rich. 10% CO on emissions test, no engine light. Fuel pressure is good. Mass air flow sensor cleaned and tested within specs. O2 sensor stuck biased lo...
1989 Buick Reatta 3.8L abs VIN: 1G4EC11C9K
After bleeding and adjusting emergency brake, we test drove this vehicle and with the first push of the brake pedal the amber ABS light comes on, then the as we push the pedal on down to stop the red brake light comes on and will have good brakes , really stop...
1987 Chevrolet G20 Chevy Van 5.0L Excessive Emissions VIN: 1GCEG25HOH
to all u gm techs, I have this van that seems to run a little on the rich side I replaced 02 sensor for a code 45 concern and truck still seems to run a little rich Trouble codes: 45 (oxygen sensor)
1997 Chevrolet Corvette 5.7L Stall VIN: G2V5103974
hi i need some help i had this 97 corvette 3 days a go. with a p0440 code purge valve stuck replace valve clear codes .guy takes the car next day call and say car has no power. ok have the car at the shop car starts and run .when put the car in gear .it stalls...
1997 Chevrolet Malibu 3.1L Surge, MIL Lamp on, SURGES AT IDLE ONLY VIN: 1G1ND52MXV
this car has an erratic idle problem. starts and runs great until it goes into closed loop. then, idle surges rapidly as long as you sit and idle - will stop when put in gear. only very seldom will do it at a long red lite., fuel trims go to -18%, o2 shows ful... Trouble codes: P0300 (multiple random misfires)
2004 Chevrolet Blazer LS 4.3L Alarm system VIN: 1GNDT13X44
Customer stated the alarm is going off intermittently overnite sometimes multiple times. We have had it at our shop on and off for 2 weeks and have not been able to duplicate the problem. We gave it back and she states the alarm is going off again at nite shor...
1995 GMC Jimmy SL 4.3L dome light VIN: 1GKDT13W0S
jimmy came in with dome light on perform tests on door switches, panel dimmer switch, all good. it haskeyless entry and unplug receiver blue plug works prefect, but keyless entry will not work. performing tests showed bad receiver, replaced receiver same probl...
2006 GMC Savana 1500 5.3L MIL Lamp on VIN: 1GKFH15T66
hello and thanks for the help. this vehicle came in with a lean condition on bank 1 and 2. after checking freeze fram record the fault happened at idle we found the fuel trim long term was maxed out. we then searched for vac leaks and found it leaking at the i... Trouble codes: P0171, P0174
1995 Oldsmobile Silhouette 3.8L forward gear select VIN: 1GHDU06L4S
9-08 trans rebuilt. Months after transmission rebuilt, SES lit and vehicle seemed to only have high gear, reverse worked normally. Trans shop had it over a week, worked normally. Problem continued intermittantly. Another shop replaced the PCM on 2-7-09, and ag...
1996 Pontiac Grand Am SE 3.1L shift lever VIN: 1G2NE52M5T
vehicle runs good but sometimes it blows fuse for the erls. and when that happens you connot get shift lever out of park. erls fuse feeds pcm, brake module among other things. problem is very intermittent. i am hoping that someone has seen this problem and cou...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick LeSabre Custom 3.8L Mechanical VIN: 1G4HP54K51
Thanks to all.. I did pull intake and found lower gaskets leaking. Replaced gaskets and all works well with no oil consumption. Nate
1998 Cadillac Seville STS 4.6L Cuts out VIN: 1G6KY5497W
I did not have 13ohm resister to installed so i replaced with 10ohm did not work. I guess someone mention take the sensor out of the old to fool computer other shop throw way old strut so no luck.
1990 Chevrolet Cavalier 2.2L Stall VIN: 1G1JC54G5L
unplugged tcc car drives fine now, customer declined replacing the part, seems happy to drive it the way it is now, thank you for all the helpful replies
2001 Chevrolet Cavalier LS 2.2L wont set readiness VIN: 1G1JF52441
well the customer chose not to persue the matter any longer since he was able to smog the car with 2 readiness flags not set. Thanks to all for your input, Btw I did try virtually all of the suggestions but none helped. thanks
2001 Chevrolet Malibu 3.1L interior equipment VIN: 1G1ND52J81
Well it never hurts to get a second opinion in this buisness thanks everyone. You were right on the money with the igintion switch. Works everytime now on start up with no funky check engine light or unoperable devices in car.
2002 Chevrolet Camaro Z28 5.7L spark/pulse VIN: 2G1FP32G12
Well, sorry took so long,decided to take vehicle to dealer,customer said they replacd ignition switch and bcm,with some kind of wiring harness.thanks for all that replied.
2003 Chevrolet Impala 3.4L cooling fan VIN: 1GCW145HYU
thanks folks, job done was the bcm defect your help was precious
2005 Chevrolet Silverado 2500 HD 6.6L Cuts out, Stall, MIL Lamp on VIN: 1GCHK23235
Sent it to the dealer, thought I had a wiring problem, they found a rotted wire under the fuse block.Thank you all for the help I received. I am weak on diesel, but I have started to fix that problem. Now, if anyone wants to help me with a newer Dodge Cummins ... Trouble codes: P0335, P0341, P0016.
1997 GMC K1500 Sierra SL 5.7L failed emissions VIN: 2GTEK19R4V
Well, I had the customer go see a friend of his and install the US calibration for this truck and it passed, so I think it must have been the problem. Thanks for the suggestions and help!
2001 Oldsmobile Aurora 4.0L Gauges/Lighting VIN: 1G3GS64C71
Thanks for the replies, this one is outta here. The first reply from Donald saying these cluster are only servicable by Delco pointed us in the right direction. We called our local ex-Olds dealer, gave them the VIN and mileage, and two days later we had a rebu...
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