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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 13, 2005
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Open Help Requests for GM
Help Request Answers
1996 Buick Regal Gran Sport 3.8L high pitch noise VIN: 2G4WF52K4T
Vehicle brought in for tune-up. Owner states there has been a high pitch noise coming from the left front at speeds of approx 24 up to 38 mph. Seems to diminish at higher speeds. replaced lt frnt wheel bearing no change. Moved p/s lines away from chassis, no c...
1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G6CD5338L
1994 Cadillac DeVille 4.9L Poor Idle Quality, Surge, Stall VIN: 1G6KD52B8R
Hello All Sorry for the long post but this car is driving me crazy I have this Cadillac that I am pretty sure was taken to the auction because someone couldn’t fix it . Guess where it ended up. In our shop!!! It has a flutter or sputter at idle that turns int... Trouble codes: 52 (long term memory reset)
1997 Cadillac DeVille Concours 4.6L Not Ready VIN: 1G6KF5497V
The Vehicle will not set monitor O2 sensor or heater or catalyst only set EGR. Drive trace, Cold Start, no mil, Gm and bulletin drive trace tried.
1996 Chevrolet Beretta 3.1L Cuts out, Stall VIN: 1G1LV15M2T
guys this berretta is loosing power when fist start out after a mile or so, when you hit the gas petal there is no power and even start to slow down and then it runs all at once and runs fine until you slow up for a curve and hit the gas again and it like noth...
1996 Chevrolet K2500 Cheyenne 5.7L No Start VIN: 1GCGK24R1T
I had a '96 Chev pickup with 5.7L die on the freeway last night. It didn't have any codes set and no power to excite the fuel pump relay. Towed it back to the shop where it was a little more quiet and checked the only schematics I have available. Not sure if t...
1998 Chevrolet Malibu LS 3.1L Hesitation, Misfire VIN: 1G1NE52M6W
Gentalman, what we have here is a 3.1L that feels like it's running out of fuel under load. when accelerating the car seems to die off thru the whole range of the throttle until you hit WOT and the pcm goes open loop then the car is a rocket.it aslo holds the ...
2002 Chevrolet Trailblazer LS 4.2L Stall VIN: 1GNDS13S22
this blazer is at a friends shop.the customers complaint is at random times when you come to stop sign THE blazer stalls but start right back . friend at shop unable to recreate this syptom . he has scanNED computer for codes , none are present,has checked fue...
1990 Geo Prizm GSi 1.6L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1Y1SL5453L
Hi ,thanks for your time ,the problem i am having is the o2 signal on the red and green wire (o2 input to ecu) is always 0.900v even if i disconect the brake booster and induce a vac leak ,also if I disconect the o2 I still get 0.9v comeing out of the ecu.I ha... Trouble codes: 26 (rich exhaust), 21 (02 sensor), 25 (lean exhaust)
2002 GMC gmc c6500 7.5L oil service light VIN: 1GXG6H1E82
Oil service light is on. How do you reset it?
1994 Oldsmobile Cutlass Supreme 3.1L dome lights VIN: 1G3WHSSM9R
This car kills the battery by the interior lights staying on,we have a 2amp draw on # 4 fuse in the electrical center under hood.The only way we can eleminate the draw is to remove ALL the 4 fuses in the glove box(any combination will still have a 2amp draw)(c...
1999 Oldsmobile Alero GL 3.4L tire monitor VIN: 1G3NL52E3X
I just need tire monitor reset procedure, there was no owner's manual with the vehicle, and no info in shop key. vehicle wii be back for additional work i'd like to be able to reset the monitor when it's in for that. thanks in advance!
1995 Pontiac Bonneville SSE 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2HZ5218S
I have a real brain teaser. This vehicle originally came in for a stall and very poor run. The symptoms were not present until vehicle was upto operating temperature for awhile. After it would stall the engine will idle roughly. I can raise the RPM to 2000 and... Trouble codes: P0341
1994 Saturn SW1 1.9L No Start VIN: 1G8ZG8597R
This Saturn has an extremely intermittant problem; after hot soak it cranks, but won't start. This condition only lasts for about 2 minutes at best, and often it does not happen at all. During the no starts I've been able to reproduce the following is true: Ha...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L No Start, Poor Idle Quality, Cuts out VIN: 1G4CW52KXS
Thank you to all who replied with suggestions. This was a long drawn out process as it was an intermittant process. After replacing the fuel pump and filter as most suggested, the cold no start was still a problem. We decided to replace the crank sensor for go...
1996 Buick Century Custom 3.1L valves VIN: 1G4AG55M1T
Hey everybody, It is done! I had 28 hits on this problem and almost everyone said the pushtubes were in wrong. Well I have to admit I was begining to think the samer thing but I looked at the box the gaskets came in and it said these fit the 2nd design. I thou...
1998 Buick Regal LS 3.8L customer VIN: 2G4WB52K8W
thank all of you very much. the right front strut mount was the fix, not visable wear but after removal very obvious center completly separated. never could catch anything on scope or tech 2. note: these sensors are inside of hubs not external rings. thanks ag...
1999 Buick Regal GS 3.8L No Start, Stall VIN: 2G4WF5215X
Well the fuel pump resistor fixed the buick. Thank you all for the quick responses. I definitely couldn't see the forest for the trees on this one. Thank you again.
1994 Cadillac DeVille Concours 4.6L Misfire, MIL Lamp on VIN: 1G6KF52YXR
replaced pcm and it cleared the problem. thanks for your replies Trouble codes: P0035.
1990 Chevrolet Lumina APV 3.1L No Start VIN: 75YHTFDFH5
thanks for all replys guy's the problem is fix and car runs great now ... a fuse link on the starter is the problem ..clean it and everything all right now
1992 Chevrolet C3500 Cheyenne 5.7L No Start VIN: 1GBHC34K5N
Sorry for the delay,the owner wanted to run most of the fuel out before we worked on it.I got a lot of replies on this one and most said to replace the fuel pump. I did that today and it started right up and he left and no more hard start warm. Thank you all f...
1994 Chevrolet C3500 6.5L MIL Lamp on VIN: 1GTHC33F2R
After replacing the air filter, the owner drove it a week & brought it back for me to check, and the code had not returned...runs great now... Trouble codes: 69 (tcc always engaged).
1994 Chevrolet Lumina APV 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GNDU06DXR
Thank you all gentlemen for your replies - some suggested crank sensor, others injectors, and 1 was short and sweet - gotta get fuel pressure reading cold first - so first thing this morning I hooked up the pressure tester without starting vehicle and found wh...
1995 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1JC5246S
i went back to were i started i began this repair with a diagnostic and my info lead me to the fuel injectors ,so ripped them out again purchased a set linder tech injectors and the car went into fuel control and passed illinois emission test on a 31 second fa...
1997 Chevrolet C3500 Cheyenne 7.4L vent system VIN: 1GBKC34J4V
ending up replacing injectors fuel presure normal,5 psi bleed down,customer said fuel smell going away thanks everyone
2000 Chevrolet Express 3500 LS 5.7L Hesitation, no power VIN: 1GAHG39R3Y
Thank you to everyone who helped me fix this van. Tony hit it on the head. Sugested cleaning maf and problem is fixed. I learned from a delco tech that you can not check fuel volume from the shrader valve port on these vans. I guess there is to much of a restr... Trouble codes: P1336.
2001 Chevrolet Impala 3.4L Starting VIN: 2G1WF55E21
When you Disconnect the battery ground, the car would start until the U-Code would set. Installed a new BCM, used my Tech 2 to set it up, then used the 3- 10 minute relearn in Alldata so the BCM recognizes the Theft password. Some said ignition switch, or key ...
2002 Chevrolet Avalanche 1500 5.3L p/s pump VIN: 3ENEK13T82
Thanks for all the help.I think we found the problem but will be unable to try it because the customer can't afford the upgrade to a New Gm pump. GM has updated the pump and accutator for this problem. one again thanks to all who helped us out
1993 GMC Safari SLE 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy VIN: 1GKEL19W3P
Thank you everyone. 99.9 perct. said it would be in the cpi unit. You were all correct. It was leaking from the pres. regulator. I went to GM, they had everything in stock so I installed the cpi unit along with the lines. While i was there I also cleaned out t...
1997 Hummer H1 6.5L blower motor VIN: 137ZA9031V
i apologize for the delay in closing this post. the customer has picked up the hummer and will return at a later date. the information i have received from you guys is very good and i'm sure we will be able to fix this vehicle once it is brought back. i will b...
1995 Oldsmobile Aurora 4.0L Instrument panel lights VIN: 1G3GR62C4S
Thanks for the help, this one had me for a little while. I finally found the schematic in alldata which showed two dimmer modules. The test says if all three steps pass replace the 'switch'. Upon calling for the part I found the 'switch' also listed that way i...
1995 Pontiac Firebird Formula 5.7L Cooling Systems VIN: 2G2FV32P1S
Thanks for all the replys.They were all helpfull.I cked and tryed the air in the system.1 compression ran smooth I knew somthing else was found the Scott was right there was air the system.Thanks to all.The fans came on at 221f down to 213f after now that I bl...
1996 Pontiac Grand Prix SE 3.1L lock-up convertor VIN: 1G2WJ12M4T
This unit is on the soon to retire list! We did a transmission service on it (pretty burned) and added stabilizer. Customer is now getting intermittant OD and lockup. I believe, considering the information gathered by you fine techs that this transmission is d...
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