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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 8, 2005
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Open Help Requests for GM
Help Request Answers
1990 Buick Riviera Luxury 3.8L Surge, Cuts out, Misfire
this car has me stumped. origianlly came in for a dieing problem. found coil pack and module melted together. replaced coil and module and all was good for 3 weeks. car came back for a missfire at 2800 rpm and up worse under load. found cam sensor code and mag...
1996 Cadillac Seville STS 4.6L bcm VIN: 1G6KY5298T
Hi This cadillac has a current drain that pulses from about .125 amps to about 2.5 amps every 5 minutes or so. The drain will clear if BCM is disconnected.I know that the BCM is energizing relays related to the retained accessory power (RAP ) System when the c...
1996 Chevrolet Express 1500 5.0L No Start, Cuts out, Stall, Misfire VIN: 1GDFG15M4T
vehicle came in with an intermittent stalling problem, that wouldnt start up until you gave it a while. customer brought it in and we never had a problem with it for the first 3 days then we had it running again and we must have sneezed on it because it died. ...
1996 Chevrolet Camaro Z28 5.7L no fire out of coil VIN: 2G1FP22P1T
We just installed a remanufactured engine. When we tried to start the vehicle there was no spark. There is power to the coil and none coming out. We tried another coil and had the same problem. There are no codes in the vehicle. I really would appreciate any h...
1998 Chevrolet S10 LS 4.3L MIL Lamp on, CEL on VIN: 1GCCS19X1W
Hi, Thanks for your time. We have this S10 P/U came in with service engine light on. No complaints on drivability. Scanner will power up but will not communicate at all. Have battery power to DLC, but nothing on class 2 serial data pin at DLC. Mitchell says ma...
1999 Chevrolet Lumina 3.1L door locks VIN: 2G1WL52M6X
hello, i have a 99 lumina in the shop for inop key fob only on lock and unlock(trunk still works) and the power lock switch works manually most of the time but after a dozen or so times of lock/unlock it quits, they all quit, then you can use the pass switch a...
1999 Chevrolet Blazer 4.3L Hesitation, Surge, Cuts out
OK Techs, Here we go. This was brought to us for lack of power. Test drove to verify. NO Power. This thing starts and idles GREAT! You take it out on the road, it acts like the exhaust is partially plugged. No Codes. Every reading on the scan tool is perfect t...
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge VIN: 2GCEK19T3Y
After warming up, if the truck is shut down for 20-30min and restarted it acts as if it was flooded. this poor idle only last for 30-45 sec. Scan data did not show any reason for this that I could see. Other than this the truck runs fine.
2000 Chevrolet Prizm 1.8L MIL Lamp on, no communication VIN: 1Y1SK5289Y
Hello, I have been fighting this one awhile. We have no communication with PCM. Original complaint was engine overheated and ses light came on. I got the vehicle and tried to check for codes, but could not communicate. Checked power and grounds to pcm, all oka...
2000 Chevrolet Venture 3.4L Accessories VIN: 16NDU03E0Y
hello all, I have this venture in here with some electrical problems. The first problem is that the power sliding door only works manually. No power at all. Has anyone ever come across this. The second problem is the door locks will not activate when the vehic...
2002 Chevrolet Impala 3.4L compressor VIN: 2G1WF52E12
This is probably one for the GM techs, but if anyone else can help, I would appreciate it very much. I have a 2002 Malibu that the compressor starts out cycling erratically and then shuts down. It will cycle for a few seconds from time to time after this, but ...
1997 Oldsmobile Bravada 4.3L code po740 VIN: 1GHDT13W9V
Vehile sets a code PO740. Checked fuses and found #24 fuse blown. Replaced fuse and also replaced TCC solenoid and harness. We checked the tcc valve for binding = none. Also checked resistance of TCC pulse width solenoid with a new one and both are identical. ...
1990 Pontiac Grand Prix SE 3.1L low power VIN: 1G5WT54V1L
Hi everyone this is my own car, ever since i did this job it is low on power. traced the problem to the computer. or so i thought. the wastegate solenoid is not getting grounded by the ecm. following the test chart for turbo wastegate overboost.when you ground...
1996 Pontiac Bonneville SE 3.8L Air distributor VIN: 1G2HX52K6T
Hey there Pontiac techs. I hope that one of you has come across this one before. The air conditioner on this car blows out of the defrost, and on the floor. We've tried a new control head. A new programer. We even tried another new programer thinking that the...
1999 Pontiac Sunfire SE 2.2L timing chain VIN: 3G2JB5243X
This car came in as a lost power, died and wont restart problem - we cranked it over and it sounded like no compression and so we assumed timing chain but this seems like low miles for a timing chain failure - MOD is very lacking on tsb's and we found nothing ...
2001 Saturn L200 2.2L Accessories VIN: 1G8JU52F21
I have diagnosed a faulty BCM. My question is can I reprogram the the new BCM with my Tech 2? I am unable to select Saturn under the prorgramming menu. I can get Saturn data, etc, but no programming options. Alldata calls for the Saturn Service Stall Procedure...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac DeVille 4.9L Compressor VIN: 1G6CD53B9P
Thanks to the 15 who took the time to respond to my request. They mostly fell into two categories. About half said that any BCM codes (especially 46 or 47 - low refrigerant pressure) would disable compressor engagement. Clearing the codes should take care of...
1997 Cadillac Seville SLS 4.6L stability system VIN: 1G6KS52YXV
Well, it seems we got lucky with this one. It turns out someone had replaced the ABS control module with a used one sometime in the past. It was replaced with one from a car that was equipped with ride control and our car is not. to further complicate things t...
1995 Chevrolet Camaro 3.4L Poor Idle Quality VIN: 2G1FP22S4S
Thank you, Claud, for your input. The problem ended up being the crankshaft end play was 1/4' possibly caused by the high performance stiff clutch the customer installed. The reluctor ring was too far from the crank sensor at times. I ended up adding 5/32' shi... Trouble codes: 36 (24X signal error), 43 (knock sensor signal error).
1996 Chevrolet K1500 Cheyenne 5.7L 3rd gear VIN: 2GCEK19M0T
I would like to thank everyone who responded to the post. The problem was finally found. The foward drum had a crack in the face. This caused a cross leak I guess. Well anyway its working now. Like they say some days your the hydrant and other days your the do...
1997 Chevrolet Camaro Z28 5.7L fans VIN: 2G1FP22P8V
Thanks to all you sent some help. Replaced the relays for the fans that seemed to help. Gave back to customer, have had no problems.
1998 Chevrolet C1500 Cheyenne 5.7L No Start
First I want to thank everyone who replied. I've worked in shops before where you couldn't get as much help as you do on here. The customer brought the truck back this morning and I checked the terminals in the relay box and there was 2 of them spread wide ope...
2000 Chevrolet Silverado 2500 6.0L Differential VIN: 1GCGK2U4YE
well its not always the switch this time it was the motor on the transfer case bernard from n. c. gave good advice i also remember a artcal in motor mag about but could not find it if any knows what issue let me know thanks [...]
1995 Oldsmobile Aurora 4.0L Accessories VIN: 1G3GR62C6S
Isn't it funny how you ask the cust if the car has had any concerns that may lead up to the problems you are having now, they always say no. Well come to find out this car has had a lot of electrical issues, car was wrecked at one point which resulted in a maj...
1999 Oldsmobile Intrigue GX 3.8L Starting VIN: 1G3WH52K7X
Morning every one, this ones down the road. The problem turned out to be a defective key. I cleared the codes which were for incorrect key data, and redrove the car, the first code reappeared on the first two test drives. I repeated the test drives with the sp...
2000 Oldsmobile Silhouette Premiere 3.4L Surge, Cuts out, Stall VIN: 1GHDX13E2Y
after trying everything that was e-mailed to me,i noticed that when you cause codes in the system that the check engine light would not come on.so we replaced the ecm and the problem has been gone ever since.
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