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Prev Professional Automotive Repair Technical Discussions for May 4, 2006
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal LS 3.8L evrything in the dash turn signals shift releaseha VIN: 2G4WB55K6Y
this car is crazy when u turn the key on everything in the dash blinks in and out when u try to start the car it wont start half of the time and when u do get it started u cant put it gear to get it started i had to turn the hazards on and leave them on or it ...
1988 Chevrolet K2500 Cheyenne 5.7L Cuts out, Stall VIN: 2GCFK24K6J
This truck has spent more time at the shop then on the road the last 6 months it will run down the road fine turn around and come back and it will stumble like you lose a cylinder everything i have done helped but it would come back in two days with same probl...
1989 Chevrolet C2500 Cheyenne 5.7L No Start VIN: 2GCFC29KXK
Vehicle came to shop on a rope...customer said while driving vehicle stalled/stopped, would crank OK, but no start...after about an hour restarted and he went to store...coming out of store vehicle wouldn't start. Had towed to another shop (this occured in a t...
1990 Chevrolet Lumina Euro 3.1L No start VIN: 2G1WN14T7L
This car has a cranks ok, but no start problem. No injector pulse, good spark. The scan data shows the computer has a rpm signal when cranking (250rpm), good fuel pressure, and all other sensors appear to be right on the money. The possitive side of the inject...
1995 Chevrolet S10 4.3L Poor Fuel Economy VIN: 1GCDT14Z1S
strange problem. truck idles and runs smooth. o2 sensor functions properly up to 2000 rpm then drops off to low number around 63 and crosscounts stop altogether. fuel economy has dropped significantly. all other readings normal. do not have an exhaust anylizer...
1996 Chevrolet S10 4.3L Cuts out, Stall VIN: IGCCS14X5T
This truck has no codes.It runs good untill engine starts warming up then it will start cutting out or sometimes it will stall.It will start back up.When it starts acting up the brake light will come on,when brake light goes off it runs fine.I apreciate any he...
2000 Chevrolet Corvette 5.7L Valve train or exhaust manifold VIN: 1G1Y22GXY5
I've checked Alldata for tsb and found none. I've heard valve train and heads are week for boost over 10 PSI. Boost on WOT is about 5 PSI while driving. Are valve seats known to get loose but not stick under valve?
1997 GMC K2500 Sierra SL 7.4L rear view mirror VIN: 1GTGK29J3V
need some help with a minor problem,customer recently purchased this vehicle and is quite happy with it.but he has a complaint i have know answere for.the rear view mirror has a nice digital compass display that works just fine,the problem is the customer thin...
1995 Oldsmobile Aurora 4.0L MIL Lamp on VIN: 1G3GR62C8S
Hello Everyone, This car was brought to me with a no start (with key), and a poor idle quality complaint. I ran down the "no start" as a bad relay (the one controlled by the VATS computer). At that time it was noted that there was no communication between the... Trouble codes: P0080
1996 Pontiac Grand Am GT 2.4L No Start, Starts then Stalls VIN: 1G2NW12T2T
HI Y'ALL!!! I got a Pontiac Grand ham, here that has code p1629(theft detterent fuel disabled) starts then stalls. As stated the ignition was replaced. I am expecting the theft light to flash so we CAN relearn the password. It don't flash, just on all the tim... Trouble codes: P1629
1996 Saturn SL1 1.9L Misfire, MIL Lamp on VIN: 1G8ZH5281T
please help saturn techs car came in with misfire code p0303. scanner misfire showed high counts on cylinder 3 but was running smooth. replaced plugs and wires and test drove again. only when doing a above 2300 brake torque and backing off quickly cylinder #3... Trouble codes: P0303 (misfire cylinder 3 - misfire counters go high)
2003 Saturn Vue 3.0L door locks VIN: 5GZCZ63BX3
Customer complains of electric door locks not working (manually or by remote). No driveability complaints. Scan computer system. Found BCM history codes: U1048(lost communications with electric power steering); U1008 (loss of SIR/SDM communications; U1096 (los...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L Volt,abs,fuel,security lights and gages VIN: 3G5DB03E72
I got a different scanner that scanned the body computer in more detail. and as per the diagnostic tree i was able to verify proper voltage on all circuts except one pid that was labeled ecv and it read 3.8 volts when it should read actuall system voltage. Tha...
1985 Cadillac DeVille 4.1L Stall VIN: 1G6CD6989F
Thanks again for all the help. Paul [...] got it right. First I want to add to those who asked,I did replace the shorted injector that knocked out the ECM. That said I road tested the vehicle and it took about five miles before it died. At that point the v... Trouble codes: 12 (No Distributor Signal), 53 (Distributor Signal Interrupt).
1996 Cadillac Seville SLS 4.6L cooling fans VIN: 1G6KS52Y1T
Thanks everyone. I could not activate fans through snap on scanner, so I replaced pcm and reflashed. before pcm replacement, pcm would not provide ground on green and blue wires from pcm. After replacement ground signals were there and I could activate fans th...
1997 Cadillac Catera 3.0L Mechanical VIN: W06VR52R5V
Thanks Johnny for letting me pick your brian. I adjusted the belts and double checked myself a few times. Car started right up and runs like a champ. God, I could only image the stress a brian surgoen goes through. Thanks to all for taking the time to help me....
1996 Chevrolet S10 LS 4.3L Poor Idle Quality VIN: 1GCCT19W7T
Thanks to all who offered help. I borrowed my sisters 4.3 equipped jimmy and made some data comarisons as well as traded the map and airflow sensors for test purposes. The data was the same with the borrowed componants. The only data difference was load percen... Trouble codes: P0300 (Random missfire detected).
1997 Chevrolet Tahoe LS 5.7L axle bearing VIN: 1GNEK13R6V
Thanks to all. The overwhelming majority of replies were regarding a possible clogged vent tube, but that was not the case. After thoroughly checking everything again the only thing we could speculate on was that there was slight vertical movement in the left ...
1998 Chevrolet Camaro 3.8L Misfire VIN: 2G1FP22KW2
Found a short in the injection wireing, replaced connector to injector #6. Sorry it took so long to close had to wait until customer had time to get it repaired. Thanks to all that responded. Trouble codes: P0300 (misfire detected).
2000 Chevrolet Corvette 5.7L power steering VIN: 1G1YY32G9Y
Thanks for the replies. The car was from another shop. We changed the p/s fluid for starters, so far we haven't heard anything. I don't think this car gets much use. Andy
2001 Geo PRIZM 1.8L MIL Lamp on VIN: 1YSK52851Z
Determined from all my research and input from members that ecm is bad, causing false code. Customer declined replacement at this time due to cost and fact that vehicle has no drivability problem. This will raise issues in 18 months when state inspection becom... Trouble codes: P1349 (intake camshaft position cmp system).
1999 GMC Sierra 2500 SL 6.0L engine VIN: 1GTGK29U7X
Thanks to all who replied. I did replace the used fan clutch with a new A/C Delco unit, did not fix the problem. I used an IR temp gun on the radiator when the truck got hot, i had a 40 degree difference from inlet to outlet when hot. While scanning the radiat...
1992 Oldsmobile Cutlass Supreme S 3.1L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G3WH14T1N
thanks for the help. i finally traced the problem to the wiring harness between the crank sensor and ignition module. the harness had gotten oil in the plastic loom, causing the wires to bond together. there were bare spots that would intermittently short toge...
1995 Pontiac Grand Prix SE 3.1L guage VIN: 1G2WJ52MXS
thanks for the help all. we ended up putting in an aftermarket guage. i still think we had a sender problem but the coustomer asked for the aftermarket setup. he is happy and that makes me happy. thanks again. TED
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