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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 18, 2005
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L No Start VIN: 1G4CW53LXM
Towed in, cust. said it would start and then cut off. Car cranks fine. No spark, no fuel pressure and no pulse for the injectors. There is no voltage at the pink/black wire at the ignition module. Applied voltage to module and still won't start. PCM numbers ju...
1995 Cadillac Seville SLS 4.6L Poor Idle Quality, MIL Lamp on VIN: 1GCKY5294S
this vehicle has been at the shop for weeks another tech did the work i have just recieved the car and am unable to find a cure it will start to idle rough at any given time last only seconds then run fine again seem worse around the city have added new wires ... Trouble codes: P0083
1986 Chevrolet S10 2.5L No Start VIN: 1GCBS14E8G
customer said truck setting warming up, died then restarted for just a moment, then died again, never to restart again, he replacedthe, cap ,rotor,wires,plugs,o2 sensor,map sensor,ignition module,coil,ignition switch, fuel pump & strainer,fuel filter,ecm, hall...
1993 Chevrolet K1500 Cheyenne 4.3L Poor Idle Quality, Surge, Cuts out VIN: 1GCEK14Z6P
Hello,Truck came in with idle problem.Upon testing found the primary and secondary ignition patterns have one cylinder that has high kv.When you turn key off and restart the truck the bad pattern will switch cylinders.The truck does not have a miss.What it doe...
1995 Chevrolet Cavalier 2.2L Poor Idle Quality, Misfire VIN: 1G1JC5244S
Hello all techs & thanks for your help in advance. This car came in running very badly. When first started cold it was worse than hot and I could smell gas out the tail pipe. It has done this for a few thousand highway miles. After testing I found no codes, t...
2000 Chevrolet Blazer LS 4.3L No Start, Cuts out VIN: 1GNDT13W2Y
2000 Chevrolet blazer with the passlock security system. Truck will start then after 1 to 2 second stall. Vehicle has no injector pulse and is a sure fire symptom of a security system problem. But, there are no DTC's, the security light with key in run positio...
2000 Chevrolet Express 2500 5.7L Trans/ Engine VIN: 1GCGG25R7Y
Hi IATN members, Have tried to figure this van out but have had no luck. This van stalls when put into gear D or R and light power brake. Have had update for this condition from dealer TSB. Sent to trans shop for Tcc solenoid out of specs,drove a week. Va...
1996 GMC Safari SLE 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GKDM19W9T
car will run goood when it wants to. then all of a sudden will pop out with p0339 crankshaft circuit int. and p0341 cam sensor performance. timing retard will go to 60 degrees. and will run bad i can tell by noticeing it on tech misfire on #1 and #3 cylinders....
1998 GMC 7500 7.0L stays at idle VIN: 1GDM7H1M5W
sometimes when u put the throttle to the floor the engine stays at idle. if you hold it there sometimes you cand hear the throttle open and the engine will rev then. this is a propane delivery truck. and has been converted to run off propane. i dont think this...
1999 GMC Yukon Denali 5.7L transfer case fuse VIN: 1GKEK13R3X
vehicle came in with clunking noise in transfer case. replaced case with oem transfer case. since then has been popping fuses for case. was tested as a encoder failure through us and verified by gm. replaced encoder motor and problem still occurs. all wiring h...
1999 GMC C1500 Sierra SL 5.0L alternator VIN: GZX6D20001
he vehicule comes for voltage variation check computer fuse look good ...change alternator ...everything is good ...one day later came back with the same problem ..last y rempalce it with napa alternator 105 amp...today replace it with 135 amm with the same pr...
1996 Oldsmobile Cutlass Supreme SL 3.4L Poor Idle Quality, MIL Lamp on VIN: 1G3WH12XXT
Car came in a month ago with P-0301, replaced valve cover gaskets, plug tubes full of oil. Came back with the P-0300 and P-1441. Found evap hoses swapped, believe that was what was setting evap code but can't find any reason for misfire, our generic scan tool... Trouble codes: P0300, P1441
1997 Oldsmobile Cutlass Supreme SL 3.1L anti-theft VIN: 1G3WH52M1V
Hi Techs I got this car from the body shop. The steering colum was damaged trying to steal the car. They wanted there used colum installed. I did the install and the engine would not crank. I could jumper power to solenoid & would crank and start, also stay ru...
1997 Pontiac Grand Prix GTP 3.8L Alternator VIN: 1G2WP1211V
need to know what els could be causing this to happen. Do not think the computer is bad. Looking for any help I can get. Have had the car for 2 weeks.
2002 Pontiac Grand Am SE 3.4L Starting VIN: 1G2NF52E82
Hello all, I have this 2002 grand am se for a no start, no crank condition. No power to starter trigger wire. Went to mitchell and pulled up Starting/charging wiring diagram for 2002. Checked for power at crank fuse while cranking: yes . Then i pulled relay ou...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet Lumina 3.1L power steering pump/line VIN: 2G1WL54T2P
We only got a few responses on this one but they all seemed to point towards the line being bent causing it not to seal. We ended up replacing the line and when it was out of the car we pressure tested it with air and soapy water. The line ended up having a cr...
1997 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEK19R4V
thanks to all that replied.he called today to tell me he put a new distributor cap on and it starts fine and runs well. he said the service engine soon light still on.i told him we need to try a crank relearn which all the replies suggested. he gave it back to... Trouble codes: P1345.
1999 Chevrolet Venture 3.4L traction control VIN: 1GNDX03E8X
Can anyone say KISS as in keep it simple stupid. After reading Josh's info, I realized the system was working. When I burned off the tires, the low traction light on the dash came on. If I operated the momentary switch, the light stayed of on the dash. I pulle...
2001 Chevrolet Silverado 2500 HD 8.1L Cuts out VIN: 1GCHK29G91
No conclusion. Tested fuel pressure, OK. Wiggled wires. Checked for codes, none. Checked crk sensor. Then customer wanted to stop spending money until it fails more regularly. Many thanks to all who responded it was a big help channeling my thinking.
2000 GMC Yukon Denali 5.7L low beams VIN: 1GKEK63R9Y
hi to all who attempted to aid me in finding a fix for the'no low beam' complaint on the yukon. all of the nine replies i received were very good & in excellant detail. a few on the responses were things we have allready tried, thank you for those people who w...
2002 GMC Safari SL 4.3L Excessive Emissions VIN: 1GTDM19XX2
Thanks to all who replied. My problem was 2 fold. 1st, I was focusing on running the catalyst monitor first. I thought it had to run before the evap monitor but I was wrong. 2nd was not meeting the criteria to run the evap monitor. I had not even looked at tha...
1997 Hummer H1 6.5L heater VIN: 137ZA9037V
Problem was a head gasket leak introducing air into the cooling system creating a air pocket. thanks for all of your help!!
1994 Oldsmobile 88 Royale LS 3.8L hard start, code set VIN: 1G3HY52L8R
thanks for the input everyone. Most said the crank sensor can set these codes without setting it's own code. The crank sensor tested good on all the tests, but I decided to replace it anyway. So far so good, it's been gone for 2 weeks. It was a pretty intermit... Trouble codes: P0321, P1361.
1995 Oldsmobile Aurora 4.0L Charging VIN: 1G3GR62CXS
Well, it is finally fixed- after TWO alternator changes (no fault of the NAPA alternator). I had checked power and ground voltage drops as I always do- even doing a 100amp load test on the positive feed wire for the alternator to check for a bad connection som...
1995 Pontiac Grand Am SE 3.1L trans noise VIN: 1G2NE55M2S
we took rear cover off thinking we would find the pump chewed up we did not at that point we stopped work & told customer our findings. customer decided to put used unit in. we installed today noise is gone. did disassemble old unit down to chain. & found no b...
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