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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 7, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L whole car VIN: 1G4GD221XS
hello techt...looking for some help please...thank you in advance...i have this vehicle that has a vibration problem at and idle. the vehicle is not missing spark or injetor wise. but the vibration is shaking the entire care...i have heard the dampers on the 3...
1996 Buick Century Custom 3.1L Fail emissions test VIN: 1G4AG55M3T
This car had no check engine light on with KOEO so it failed emissions test with 2 fault codes. MAF sensor and Bank 1 sensor 1 Oxy. sensor. I found that someone had cut the thin-film printed circuit board behind the instrument cluster on the strip that the com...
1991 Cadillac Fleetwood 4.9L No Start, Cuts out VIN: 1G6CB53B0M
while cranking engine starts for a second then stalls, even if key is held in the on position. if carb cleaner is sprayed into intake, simulating a prime, engine starts and runs fine untill what seems to be a loss of voltage. if battery is disconnected or if v...
1997 Cadillac Catera 3.0L blower VIN: W06VR52R6V
need help with a catera. i don't want to pull the dash apart if i don't have to. the problem is that the blower motor stays running with the key off. the wiring diagram shows the blower controlller gets power from a always hot fuse. the blower motor controls f...
1992 Chevrolet K2500 Cheyenne 6.5L engine VIN: 1GCGK24FSN
Hello and thanks for reading this post. We don't do much diesel work but this was orignally coming in for a transmission problem. Came in on a hook. No start. When we cranked the engine it spun over way to easy. Checked compression and found none on several cy...
1994 Chevrolet Astro CL 4.3L Charging guage VIN: 1GNDM19W6R
Towed in to shop.Battery completly discharged,serpentine belt missing.Recharged battery and install new belt.The van start and runs but no charging.This van has digital instrument cluster on the dash.Check fuses..o'k, this alternator has one positive terminal ...
1995 Chevrolet Lumina 3.4L starter VIN: 1GCEE1432D
This vehicle will not crank and the security light flashes constantly.When you turn the key on it will turn the fuel pump on for a few seconds. I have replaced the theft relay with no results.Going by the tests in mitchell I can jump the relay and get the star...
1995 Chevrolet Lumina APV 3.8L No Start VIN: 1GNDU06L2S
This car has been in two different shops before it was towed here. The customer says the car originally lost power and stalled at stops, finally it wouldn't restart. The first shop put in a cam sensor and water pump. Still no start. They checked all the basics... Trouble codes: 0342 (cam signal circuit)
1999 Chevrolet Venture 3.4L maxifuse 5 VIN: 1GNDX03E9X
Hey techs, need help This van came in last week with leaking lower intake gaskets and bad stater drive. We replaced the starter with a rebuilt AC Delco starter. At the same time we also replaced the lower intake gaskets. We also removed the fuel tank and repla...
1991 GMC K1500 Sierra SLE 5.7L lock up VIN: 1GTDK14KMM
hello, I'm at my wits end on this one. it feels like an ignition miss, it only occurs when the lock up comes on. we found leaking secondary, replaced it, tried again, still the same thing. trans fluid ok. i checked the fourth gear swich input and the t.c.c. o...
1994 GMC Sonoma SL 4.3L Cuts out, Misfire VIN: 1GTCT14W0R
truck cuts out backfires between 2000-3000 rpm. timing mark on balancer does not line up with timing tab when no.1 piston at tdc.
1995 GMC P 30 4.3L Hesitation, Cuts out, Stall VIN: 1GBJP32Z0S
engine backfires on accel,flames out of tbi, can not found cause, lots of parts, compression test show mechanically okay(150 psi), the running compression test shows good intake flow and sealing. (125 psi). fuel is from are own tanks and looks clean, the exhau...
1997 GMC Savana 1500 5.7L door locks VIN: 1GDFG15R1V
cant get keyless entry to program remote, during process after grounding wire on aldl doors locks cycle ok but then when pressing any button on new remote it wont do anything. customer is a car dealer and wanted the aftermarket (gm dealer add on) security syst...
2001 GMC Sierra 1500 SL 4.3L No Start, extended crank VIN: 1GTEC14W21
I have a GM truck that is giving us a hard time. After sitting, especially over night it has a hard time starting. First thoughts were fuel pressure. When it will not start pressure is at least 62 psi while cranking. Pressure drops to zero when not cranking. I...
2002 GMC Sierra 1500 5.3L MIL Lamp on VIN: 1GTEK19T43
Linked up with data link and watching data streem and noticed that the engine is missfiring on all of left bank. #1,3,5 and 7. Checked for bad ground on coils ( coil over plug system ) and also for power at coils. Eveything passed tests. Also noticed that the ... Trouble codes: P0300
1988 Oldsmobile 98 Regency 3.8L Cuts out, Stall VIN: 1G3CX51CXJ
Hello, I got involved with this car a month ago. It quits running while driving between 35-50 mph, its like you turned the key off, you can restart it in neutral while coasting or pull over put it in park and it restarts runs fine it might quit again 2-3 times...
1995 Pontiac Grand Prix SE 3.1L lifters VIN: 1G2WJ12M8S
Hi guys,we just replaced a leaking intake gasket (oil had about 2 qts of a/freeze in it).we had it apart for about 3 days-working on it in our spare time as the customer was not in a hurry to get it back.after we had it all back together it cranked like it had...
1997 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52K8V
hello i have a 97 pontiac int sets a po336 when i test according to the charts every thing is well.i tryed a crank sebsir and module has any one seen this problem Trouble codes: P0336
1997 Pontiac Grand Prix SE 3.8L power assist VIN: 1G2WP52KOV
Customer complained of increased effort required to turn wheel, but no loss of power assist. I noted slightly higher resistance for left turns than right, but pretty subtle. When I racked & lifted it (running), the difference was a little more pronounced: 1/4...
2000 Pontiac Firebird 5.7L turn signals
Guys I need your help with this problem. Of course this has to be my son's car! He's looking to Dad to fix it(I think he's testing me). So far I have been frustrated and unable to find this problem. It seems the fuse that feeds the turn/backup fuse blows whene...
1999 Saturn SL2 1.9L No Start VIN: 1G8ZK5278X
I need some help from you saturn guys. Car was towed in no start,spark and injector pulse ok,no abnormal scan data but no fuel pressure.R&R tank replaced fuel pump module after energizing fuel pump relay with modis the connector is hard to get to with tank in ...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy VIN: 1G6CD5333L
Greetings- this is a done deal- i appreciate all 9 help replies, as i posted it came in with a broken cam sensor,bad o/2 and chewed and touching bare o/2 wiring, after i posted i replaced the new plugs that were in it as two were fuel fouled and found 3 plug w... Trouble codes: 41 (cam sensor-).
1994 Cadillac DeVille 4.9L Poor Idle Quality, MIL Lamp on, idle to high VIN: 1G6KD52BOR
thanks for all replies special thanks to darrell klein for faxing info for repair and to mark [...] for emailing entire procedure very tedious repair customer came in today after driving it for weekend very happy with it again thanks to everyone and to iatn ... Trouble codes: P0085.
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNCT18W1S
sorry to say i am closing this one the customer will not be back until after the holidays many thanks to dan , gerry , and especialy james for his great tip on this egr system were i went wrong on this one was trusting my scan data i recently purchaced the new... Trouble codes: P0401.
1997 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W1V
Thanks for all the info. I replaced the fuel filter, which appeared to be original, and was very plugged up. Fuel pressure increased from 45 to 47 lbs, still not enough to start vehicle. Advised customer that fuel pump needed replaced, but was unable to get au...
1999 Chevrolet S10 2.2L Misfire VIN: 1GCCS1445X
thanks for the 5 replies i recieved, this one is still going on sorry so long was awaiting approval from owner to pull head and do further research. I have taken this one to 4 shops around me noone has ever seen the things replaced and still have a miss.we fee... Trouble codes: 420 (catalyast efficency).
2002 Chevrolet Monte Carlo SS 3.8L No Start, Cuts out, Stall VIN: SG1WX15K32
Very sorry for takeing soo long to reply a fix, the customer called and left a message that there was not any problems with the car after the IAC was replaced. All the numbers were correct and the same both before and after replacing it. It has been over a wee...
2002 Chevrolet Silverado 2500 HD 6.6L Transmission VIN: 1GCHK23112
This one is fixed thanks to Eric [...], my snap on scanner could not clear the 708 code I had to borrow another shops Tech2, even though I JUST updated to the new programmable all in one cartridges, cool huh, Cleared the code and all is well...
1999 GMC Sonoma SL 2.2L Hesitation, Cuts out VIN: 1GTCS1444X
thanks for all the replies to this car. sorry to say the customer didn't want to spend any more money on this truck. he's just going to deal with the hesitation. sorry we didnt find a fix to post, and again, thank you! Trouble codes: P0300 (random misfire).
1998 Oldsmobile Silhouette Premiere 3.4L Excessive Emissions, Misfire, Poor Fuel Economy VIN: 1GHDX03E2W
Sorry I took so long to close this post,as customer was going to stay in touch about the status of this Van. Anyway what we did to fix this thing was clean the fuel injectors and put Chevron cleaner with techron in the tank. Thanks very much for all the help !... Trouble codes: P0300 (random misfire).
1995 Pontiac Grand Prix SE 3.1L lfters, engine oiling VIN: 1G2WJ52M5S
Thank you all for the enlightening info regarding our difficult Gran Prix. We replaced the lifters and all noise went away, oiling now normal. Customer happy, we're happy to be done with it and to have learned so much in the process. I was impressed with the q...
1992 Saturn SC 1.9L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy VIN: 1G8ZG1479N
Thanks to all who replied. Many suggestions regarding ground problems which we took to heart and cleaned all the ground connectors I could get at. The real problem was the O2 sensor and the AC compressor had the plugs crossed (I can't believe they use the same...
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