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Prev Professional Automotive Repair Technical Discussions for March 7, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick Century Custom 2.2L Unknown VIN: 1G4AG55494
vech. will die out just like you shut switch off, and will restart. sometime when restarting vech. it acts like it will not take or getting fuel . vech will run for day before it acts up. *** vech also has had 2 fuel pump replaced. had code for crank sensor re...
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2001 Buick Century Custom 3.1L Horn VIN: 2G4WS52J91
Washed under the hood of my wifes car and the horns stayed on.(Yes, I know I'm not supposed to).Thinking I got something wet and shorted out I unplugged and let dry out. Plugged back in and no horn operation so checked for voltage and ground at horns and have ...
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1990 Cadillac DeVille 4.5L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G6CD5332L
this an employee car with big problems. car came in running perfect, only complaint was stalling out sometimes. also ses light comes on. scanner read no codes, went on test drive and car stalled out while coming out of drive way. car started right back up, and... Trouble codes: E41, E30, E52
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1999 Cadillac Seville STS 4.6L No Start VIN: 1G6KY5495X
Vehicle has intermittent no start, customer states it happens often, happened once in the shop. There was no spark, no injector pulse, and vehcle would not communicate with Snap-On scanner. When vehicle is running it communicates with the scanner and everythin...
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1982 Chevrolet S10 2.8L wiper/washer system VIN: 1GCCS14BOC
eLECTRICAL IS NOT MY STRONGEST AREA SO I AM POSTING A HELP REQUEST TO SEE IF ANY OF YOU HAVE SEEN OR MAY HAVE AN IDEA AS TO WHAT MIGHT BE GOING ON. I HAVE AN IDENTICAL SYSTEM SITTING ON THE BENCH, WE INSTALLED ALL ITEMS FROM GM AND THE RESULTS WERE THE SAME....
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1987 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GCDM15Z2H
OK, GM GUYS THIS IS A DIFFICULT ONE. ANOTHER TECHNICIAN HAD STARTED WORKING ON THIS VEHICLE AND I HAVE TRIED TO HELP WITH NOT MUCH CHANGE IN CONDITION. THE VEHICLE FIRST CAME IN WITH A MIL LIGHT ON AND CODE 33 AND 45 STORED. WELL, HE RAN THE FLOW CHART AND REP... Trouble codes: 33 (map sensor vaccum low), 45 (rich exhaust)
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1995 Chevrolet S10 LS 4.3L Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1GCCS19Z1S
Thanks in advance for the help This truck belongs to my son inlaw and has been setting a couple of months we finally got in the shop for exhaust work and state inspection now the thing wont idle. After some checking found TPS and IAC not responding replaced bo...
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1995 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS144S8
hi, need help from you gm techs. i got this s-10 failing california enhanced emissions high nox. 15 mph at 50% load and 25mph at 25% load. im reading @15/50 - 25ppm hc- .03% c0- 14.9 co2- 1908 nox- 02 0. @25/25 -- 1600 nox. spark plugs fair. check the egr valv...
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1997 Chevrolet Lumina 3.1L OBD Test not ready VIN: 2G1WL52M6V
This vehicle came in for failing the OBD Emissions test, it had a code PO 341 cam sensor. We changed the cam sensor, cleared the code, and test drove vehicle for 70 miles the first time. This vehicle is a Texas Air Care voucher vehicle where the state pays up ... Trouble codes: P00, 341 (Cam sensor)
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1997 Chevrolet Malibu 3.1L gauges/indicators VIN: 1G1ND52M1V
I've tried just about every test I can think of. Dash lights come on (background), but the check engine, oil, low fuel, etc. lights do not come on during start-up. There is no noise at all when turning the key to ACC (eg. fuel pump, no clicking for relays). Th...
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1997 Chevrolet Cavalier 2.2L daytime and highbeam headlights
This vehicle has no daytime running lights, or highbeam headlights, lowbeams work fine, also with the key on or engine running the high beam indicator is on regarless if the highbeams are switched on or not. Does anyone have any information on how this system ...
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1997 Chevrolet K2500 Cheyenne 7.4L Long crank hot VIN: 1GCGK29J1V
Seriously digging on this one. Symptom is engine cranks for 3 to 6 seconds after a hot-soak but not every time. After it fires, it acts flooded and lopes for a few seconds until it clears out. Idle is erratic for 5 to 10 seconds then all is normal as far as dr...
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1999 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC5248Y
I need help from anyone. Car came in on hook it had spark and fuel and had injector pulse + rpm reading plugs soaked. Wires in bad shape. Replaced wires and plugs, still no start. Checked compression, all between 80 and 100. Pulled plugs added some oil to each...
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1994 GMC K1500 Sierra SL 5.7L heater / defroster VIN: 1GTEK14K2R
thanks for the time.. vehicle has no heat coming from the defrost or the floor.. heat from the vents is moderate..blower function normal. inlet temp to the heater core is approximately the same as engine temp +/- 10*F blend door and motor function is normal, t...
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1995 GMC Safari 4.3L case
hi all. This van came in with a broken flexplate, and we found the trans was broken on driver side. cust wanted to try having case welded. installed new flexplace but it broke in short amount of time. removed trans and rebuilt it with a new case. 1.5 years we...
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2001 GMC Sierra 1500 SL 5.3L MIL Lamp on VIN: 1GTEK19T01
All the related repair history is over 2 months time. Truck would sometimes, usually cold but sometimes at cruise miss loose power, not pull. After 1-5 minutes would clear up, run fine, maybe rest of day or ok for 3-4 days. Well back today, lean bank codes p01... Trouble codes: P0300, P0171, P0174
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1996 Pontiac Grand Prix SE 3.1L No Start VIN: 1G2WJ12M3T
New vehicle to my shop, customer towed in with crank no start complaint. Confirmed fuel pressure and no spark or fuel inj pulse. Customer stated that he had installed new rod bearings a week before and he had been driving for a few days, then it failed to star...
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1997 Pontiac Grand Am GT 2.4L abs VIN: 1G2NW12T6V
Contineues to set the abs light on and the codes found are as follows c1222/c1226/c1233/c1236/c1286/c1291/1293.The sensor was replaced twice with aftermarket part.Axle was aftermarket as well. Any suggestions would be great this is becoming a loosing job and a...
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1991 Saturn SC 1.9L No Start VIN: 1G8ZG1475M
I'm a Toyota tech and don't have much experience with Saturns. This vehicle belongs to my boss's sister. It quit running and was sent to another shop...they did fuel pump, plugs, wires, and a valve cover gasket. Engine will start on Ether and then die in secon...
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1998 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5279W
OK, as soon as the oxygen sensor warms up (1 wire) the fuel trim steadily and quickly drops to -50% (or 64 INT)! the engine seems to run good, but the upstream sensor still stays in the 800-900 mv range! the customer bought the car with a bad transmission whic... Trouble codes: P0172 (fuel system too rich)
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2000 Saturn LS2 3.0L Engine VIN: 1G8JW52ROY
This saturn was brought in for the cel, customer never noticed the noise. When cold the engine is quiet and the missfire counters stay at zero for all cyl's. Once near operating temp the engine slowly developes the noise and the missfire counters start countin...
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L Cuts out, Stall
ok thanks to (bill from texas) you hit the nail on the head with your reply about the vats wires coming from the ign. switch they both were broke but when we replaced the switch the car would still not start. we did some more checking and replaced the crank se...
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1995 Buick Regal Custom 3.1L I/P guage indicator lights VIN: 2G4WB52M5S
Well fellow techs, thank you for all of your responses regarding shorts, diodes, BCM's, alternators etc. I posted this request on a Saturday and went to work on Monday armed with all this new information recieved from all of you. I no sooner started to work on...
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1999 Buick Park Avenue 3.8L drivers front power window VIN: 1G4CW52K1X
Sorry, I have to close this without a fix. Owners are going to put up with it untill it gets warmer out, and will most likely trade it off. They were talking about it before this problem came up. Thanks for all the replies.
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1992 Cadillac DeVille 4.9L Wont Start VIN: 1G6CD53B5N
Well we got it! Got the key today and she fired right up. You guys saved me tons of guess work and the replies were top notch. The lock cylinder did have the torn wire, most likely from the loose torx screws in there...tightened em up with some loctite on the ...
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1989 Chevrolet Blazer Scottsdale 5.7L Cuts out, MIL Lamp on VIN: 1GKEV18KOK
Well thanks again to all the great responses.It ended up being a bad fuel pressure regulator.The spring wasn't broke as some had recc.It was plugged all up inside replaced regulator and fuel pressure came back up.Vehicle runs great now. Trouble codes: 44 (lean exhaust).
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1999 Chevrolet Astro 4.3L drl VIN: 1GNDM19W5X
I have checked this van after I recieved reply's from 4 members. We found the diode behind the interior panel directly behind the drivers seat, (strange place for it), put a jumper in its place temporarily and the lights worked properly. The customer has not y...
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2000 Chevrolet Blazer LS 4.3L No Start, Cuts out VIN: 1GNDT13W2Y
Thanks for all of your help. The fix for this vehicle turned out to be the passlock sensor in the column. I was getting the 5.0v on the yellow wire with key in on but once you went to crank position it did not change. I changed the sensorm did the sensor re-le...
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2000 Chevrolet Impala 3.8L No Start, Cuts out, Stall VIN: 2G1WF55K4Y
'Lets call it the Shot Gun Method' Thanks for all the replies lots of help. I did replace the ignition switch. I also took old switch apart (while waiting for the new one)found black spots on some of the contacts. If you get a chance to take one of these a... Trouble codes: P0230 (Fuel Pump Control Ckt Problem), P0748 (Press Control Solenoid Elect), C1233 (R/F Wheel Speed Sensor Short/Open).
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1997 Oldsmobile 88 Royale 3.8L air bag light VIN: 1G3HN52K0V
thanks to the techs that replied to this help request, i have not yet discovered why the air bag light stays on i replaced the module, the connector with no codes but a continous light i will continue to try to figure this out
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2001 Oldsmobile Alero GL 3.4L r/frt sensor VIN: 1G3NL52E91
thanks to justin ,alex ,jon ,mark ,and nathan for your assistance. the customer was talking to local dealer on different matter and found out car was still under warrenty. customer could not tell me what was done to fix problem, and wouldn`t show me invoice . ...
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1991 Pontiac Grand Prix SE 3.4L Poor Idle Quality, Stall VIN: 1G2WJ54X1M
Want to thank everyone who responded. Crank angle sensor replaced, and from that time, engine has not died, but i had limited run time, as customer was going on vacation. Thanks again.
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2001 Pontiac Montana 3.4L rotors/pads VIN: 1GMDX03E21
This van had been used as a driver education vehicle in the past. While the auxilliary passenger side brake pedal had been removed, the slave cylinder and mount was still in place over the driver's brake pedal. The mount had gotten somewhat out of alignment an...
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1997 Saturn SW2 1.9L Hesitation, Cuts out, Stall VIN: 1G8ZK8275V
Thanks to all who replied. I had already checked the wires and plugs, particularly for corrosion at the coils and for proper order. The fix was indeed the cts, as judah noted, the tip was cracked. Thanks also to Scott and Butch for making my life easier by sug... Trouble codes: P599.
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