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Prev Professional Automotive Repair Technical Discussions for December 10, 2004
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Open Help Requests for GM
Help Request Answers
1988 Buick Skylark Custom 3.0L Hesitation, Cuts out, Stall, Misfire VIN: 1G4ND51L5J
Car has hesitation on snap throttle and under load. Missfires into intake manafold. Bring up throttle gently then ok. all things above have been changed recently and I have tripple checked all the operations of: MAF, Intake air temp, crank sensor, modual, tps....
2000 Buick LeSabre Custom 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4HP54K7Y
hi techs,i am a bit stumped on this one.seemed like the normal injector problem but...car came to me with a miss,cel on-po300.seen history misfire on 4 cylinders.i had tuned up 3 mo. ago.older customer,short trips so i suspected dirty injectors.cleaned injecto... Trouble codes: P0300
1994 Cadillac DeVille 4.9L Unknown VIN: 1G6KD52B1R
This car came in with a complaint of no heat, even on a long drive. After testing, I determined that the in-car temp sensor had failed (it was reading 90 degrees all the time, while actual temp was only 60 degrees). Seems pretty straight forward. After replace...
1994 Cadillac DeVille 4.9L Winshield wipers VIN: 1G6KD52BXR
I have a problem with the wiper system on this cadillac. When the car first came in the wipers would short cycle out of park about 2 inches up the winshield and go right back to the park position at a fast rate. We replaced the wiper motor and control module (...
1995 Cadillac Seville SLS 4.6L Headlights VIN: 1G6KS52Y3S
Happy holidays guys this is the first time i have posted so please bear with me.I had this cadilac come into the shop customer complaining while she is driving down the road the headlights and dash lights go off.They supposedly do not come back on until car is...
1993 Chevrolet G20 Beauville 5.7L Hesitation, Cuts out, Stall VIN: 1GCEG25K9P
Greetings Y'all. Long time no see. This van came in for stalling at idle and cutting out on acceleration. Of course when I get it it doesn't do anything. During test drive I did notice motor tended to act rather lathargic, but no listed symtpoms. So I check fu...
1994 Chevrolet C2500 Suburban 6.5L Misfire VIN: 1GNGC26F7R
To all you great techs and soon to be great techs. We have this diesel in and it pops back thru the intake /air cleaner at idle. code is for cylinder balance fault, #2. we have removed injector and valve cover. were looking for a broken rocker or low compressi... Trouble codes: 92 (balance fault 2)
1995 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 3G1JC5246S
this car comes in with customer saying check eng light and oil light come on intermitantly...code 28 quad driver is present on the scanner trouble shooter cartriage tells me to look for a short in any solonid or relay well thats a time consuming job for what l... Trouble codes: 28 (quad driver 2 fault), 32 (egr problem)
1996 Chevrolet Cavalier Z24 2.4L Poor Idle Quality, Hesitation, Misfire VIN: 3G1JF12T9T
customer states after driving for about an hour then shutting car off, then restarting runs real bad. i've tried to duplicate problem in the shop and it only acted up once for about 20 sec then cleared itself up. tested injectors and all ok, pulled plugs and f... Trouble codes: P1171 (fuel system lean during acceleration)
1996 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M7T
hello all i have run across a code that is not in any of our resources. it comes up on both a motis and a genesis as P1675D EVAP vent control solenoid circuit. I use all-data and there is no listing for this code in it. directly to the right of the purge sole... Trouble codes: P1675
1997 Chevrolet Camaro Z28 5.7L antitheft, dash VIN: 2G1FP32P6V
Need help! I have a 1997 Camaro Z28 that was towed in with a no start. I have a no crank condition and no instrument panel power. No MIL, security light, odometer, etc... I suspect the problem is somewhere in the anti-theft system. I have very little experienc...
1997 Chevrolet Venture LS 3.4L Poor Fuel Economy VIN: 1GNDX03E0V
My service Manager has asked me to post this for a regular cust that has been chasing this for a long time. I have not personally run the mileage test on this vehicle but the customer insists that his fuel mileage has dropped from 27-28 MPG (Canadian gallons) ...
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G1ND52J31
Help!!!~ Car sent to us on monday by another shop for driveability concern...car runs very poorly, stalls, hesitates, rough idle, overall just running bad. No MIL on and no codes stored, ran fuel pressure test and pressure was low, and fuel pump was cavitating...
2000 Oldsmobile Silhouette GLS 3.4L No Start, Stall VIN: 1GHDX03E2Y
Hello everyone, This van stalls when hitting small bumps & in reverse. This just started a day after we replaced the intake manifold gasket. Customer said they had no trouble prior to that. It is intermittant & will sometimes restart & sometimes not. When it d...
2001 Oldsmobile Alero GX 3.4L Unknown VIN: 1G3NK52T11
The customer says there is a metal noise coming from the back of the vehicle while driving. We hear rear strut noises. The upper mounts were poor, shock noisy & weak. We installed new struts & upper mounts. The noise that we could hear is gone after the replac...
1989 Pontiac Grand Prix SE 3.1L speedometer VIN: 1G2WP14W6K
This is a digital speedometer, it has a switch for english and metric. The speedometer is intermitant for no apparent reason, like hitting a bump or manipulating switches. We checked fuses, new vss chased wiring, power to speedometer any time we checked it but...
1995 Pontiac Grand Am SE 3.1L coolant temp VIN: 1G2NE15M3S
I recieved this car to repair after several attempts by other techs.The owner has stated that the temp goes into the red after warm up then eventually drops to normal and remains there.So far what i have come up with was that the scanner at one point says arou...
1996 Pontiac Grand Am SE 2.4L instrument cluster VIN: 1G2NE52T4T
well thanks in advance. i've got a grand am that starts then dies. when you turn the key on for a bulb check nothing lights on the ipc. pulled codes on the pcm and found p1601 and p1629. p1601 is no cuminacation and p1629 is thest deterant loss of rpm. if you ...
2000 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E3Y
Hello, I'm kinda stuck. I got this Grand Am in for intake gaskets (common coolant leak) because the dealer quoted this gal a ton. I work at a repair shop at a church and we don't have a lot of equipment. After I was done changing the gaskets, the cel came on w... Trouble codes: P0403
2001 Pontiac Grand Am SE 2.4L turn signal flasher system VIN: 1G2NF52T61
Hello. We have a 2001 Grand Am here with an electrical problem. Any time the ignition is on there is a repetitive clicking noise coming from behind the hazard flasher unit on the center of the dashboard. When we disconnect the flasher, the noise is gone. When ...
2002 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2JB52432
sunfire came from in with code 420 cat efficiency .I searched for related tsb's none found . I noticed front o2 sensor slow to respond on snap trottle test so replaced it. fuel pressure high .removed return line at regulator pressure still 72 lb Idling.replace... Trouble codes: 420 (cat efficiency)
2002 Saturn Vue 3.0L MIL Lamp on, lean code VIN: 5GZCZ63B12
engine running lean both banks. snap throttle test shows switching of front sensors followed by post sensors. system then returns to lean. vehicle drives fine and no other problems. not up to speed on saturns. thanks in advance for any help. Trouble codes: P0171, P0174

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L whole car VIN: 1G4GD221XS
thanks techs...the problem was the crankshaft dampner..the one that was on there was the wrong one..they made 2 different ones for this vehicle. according to the vin# the vehicle was the suppose to be the 2nd style. the one that was on the vehicle was the 1st ...
1989 Cadillac Eldorado 4.5L Cooling fans VIN: 1G6EL1150K
First of all Thanks to all that replied on this one.. Customer complained that after the water pump/thermostat install, that the car ran from 210 to 220..on his digital dash..before that 192 to 215... I noticed in the shop when it hit 224..both fans engaged at...
1995 Chevrolet Lumina 3.4L starter VIN: 1GCEE1432D
Everybody hit it on the nose. found a broken wire from the key switch. installed a resister which took care of the security light but still could not get vehicle to crank. jumped the relay and vehicle started and ran fine. replaced relay and all is well. Don't...
1996 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GCEC14W7T
thanks larry,roger,keith,dan,and wesley! Iatn rules ! i pluged in one at a time the ho2 sensors .of the 4 left bank #1 was shorted,no damage i could see. this took care of the po102 and the MIL reset. the truck ran smooth i was worried about the relearn of the... Trouble codes: P0102, P0340.
1999 Chevrolet Cavalier 2.2L Hesitation, Cuts out VIN: 1G1JC1245X
Thank you for all the helpful suggestions, I checked the grounds, fuel injectors and TPS to no avail. It came down to replacing the ECM. I do not have the ability to reprogram the ECM's and had to send to dealer.
1991 GMC K1500 Sierra SLE 5.7L lock up VIN: 1GTDK14KMM
well, it turned out to be the diff having failed, causing the jerking while driving in od. their was no noise or sensation to have pointed me in the direction of the diff having been the problem. it's fixed.
1994 GMC K2500 Sierra SL 6.5L Poor Idle Quality, Stall VIN: 1GTGK24F7R
Customer needed the truck and hasn't returned. Some responses were low compression and a loose timing chain. From the info I recieved it is very unlikely for the pump to cause this sort of problem. Thanks to everyone who replied.
1995 GMC C3500 Sierra SL 5.7L Hesitation, Poor Fuel Economy VIN: 1GTHC39KXS
Hi guys Tahnk you all for your valuable time.I recieved 21 replies all of great use.But unfortunately I feel i wasted your time.The problem was resolved by removing the shops fuel pressure gauge from the system .It was not mine ,I just took over from one of th...
1995 GMC K2500 Suburban 6.5L MIL Lamp on VIN: 1GKGK26F2S
Well i wanted to thank larry [...] for thier insight on the pump module unit.yes indeed that took care of the code 36 and the cruise.The logic of these computers can be so confusing at times but it is sure nice to be able to tap into combin... Trouble codes: 36 (injector pulse with long).
2001 Saturn L200 2.2L Poor Idle Quality, Misfire VIN: 1G8JU52F41
Well, I dont like closing a help request like this, but the customer had to have her car & did not bring it back. One reply was possible MAP sensor, one was a bad catalytic converter. 2 replies were suspecting burnt exhaust valves & stated this engine has a pr... Trouble codes: P0300 (random misfire detected).
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