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Prev Professional Automotive Repair Technical Discussions for May 10, 2005
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L no start no brake lights VIN: 1G4CW53LXM
the car was brought in on tow truck with no start. turn thw key on no fuel pump activity. turn it to start and there is nothing. the engine doesnt turn over either. I have checked to see if the start was stuck or bad. I turned the key on and jumped the starter...
1990 Cadillac DeVille 4.5L no injector pulse VIN: 1G6CD5330L
I have an 8 bay facility and we get them in and out but this dog is not moving. I cannot get a pulse to the injectors. Check all wiring and visualy seems ok. My parts suppliers allow me to play with parts sometime and it has been a nightmare. We have tried NEW...
1990 Chevrolet S10 2.5L Excessive Emissions, Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy VIN: 1GCCS14E1M
Hello friends. Whoever heard of such weird problems? I think we must all be nuts to work on this stuff. Need some help on this truck to figure out the fuel problem. Customer said that truck has been running fine since they rebuilt the engine and then all of a ...
1992 Chevrolet Blazer Cheyenne 5.7L Long crank time VIN: 1GNEK18K1N
Hello fellow techs around the world here is the situation. truck began to have long crank times. turning the key off and then back on would resolve the problem. upon inspection when vechicle acted up there was no spark or injector pulse present. distributor ha...
1994 Chevrolet K2500 Cheyenne 6.5L Poor Idle Quality, Misfire VIN: 1GCGK24F1R
This truck has an idle problem when cold. It spits & sputters and idles very high when cold. When it is warm it idles OK. When it is warm it runs like it has no variation in the acceleration. It is either at an idle or running wide open. You can't hold it at a...
1994 Chevrolet Caprice Classic 4.3L Differential VIN: 1G1BL52W8R
Customer just moved to NY from FL and after one snow storm came to our shop requesting we replace his open rear with a "posi". 7 1/4" ring gear with 28 spline axles that measure 1 3/16" on the outside of the splines. We've tried w/out success to order a powert...
1995 Chevrolet C1500 5.7L No Start, Stall
This vehicle never acts up when we have it in the shop, the problem is an intermittent no-start, we have checked fuel pressure and volume of fuel also bleed down, the relay, spark and spark quality, and a visual of componets, One question I have is I remember ...
1997 Chevrolet Blazer 4.3L Monitors wont run VIN: 1GNDT13W5V
Any help I can get on this problem would be greatly appreciated. Prior to replacing the intake manifold gaskets this vehicle failed inspection for OBDII readiness, or lack therof. I had the battery disconnected during the intake job so I told the customer to g...
1997 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R8V
truck has an intermittant misfire at idle or cruising. when we first got truck we checked compression and #1 cylinder only had 85 lbs.we checked all externals for cause none found.we removed heads and machine shop checked and did valve apparent problem ... Trouble codes: P300
2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCC51954Y
This truck has code for front O2 come on after being driven for half day . Sensors Fails , have replaced with 3 differant sensors , 2 Oem senosors . Once replaced they read fine , switching voltage ok. Test drive truck on highway /in town ok. Customer takes tr...
2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W8Y
i need some help on this one-we have no spark and no injector pulse-we have fuel pressure- 58-60lbs-we had a trouble code of a p0338-ckp circuit fault-we have replaced the crank sensor and distributor and we still have the same problem-?-thanx brian.
2001 Chevrolet Impala 3.8L steering column VIN: 2G1W1155K4
while driving /braking a clunking sound at sterring coulmn & or at rack when suspension moves or when applying brake i found 1 tsb about engine cradle noise & it told me to squirt a thread locking compond into the frame on the welds the noise is a constant bum...
1996 GMC Jimmy 4.3L No Start VIN: 1GKDSDFR6T
1996 jimmy no start sometimes. truck will start fine 4 or 5 days in a row hot or cold wet or dry. one time it will not start just crank. it will not restart on its own. one little shot of injector cleaner fires up no problem. will start once again for a few da...
2001 GMC Sierra 1500 SL 4.8L No Start VIN: 2GTEC19V11
Customer had dead battery & replaced it. Headlights were on even with the key removed.They would go to dim & bright with the lever, but there were no taillights. It would crank, but not start. We couldn't get thet scan tool to communicate with the PCM. checked...
1993 Pontiac Grand Am SE 2.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire VIN: 1G2NE1435P
This car has no power on acceleration and stumbles at idle. The cat was all broken apart but that seems to be just a symptom and not the cause. No codes were found but in the scanner it says that there is Quad Driver Module B fault. I searched AllData and can ...
2000 Pontiac Grand Prix GT 3.8L Poor Idle Quality VIN: 1G2WP52K3Y
Customer states, rpm go up to 4000, car starts to over heat. cannot get it to repeat problem in shop, only happens once a week. anything to go on? no codes, throttle cable looks fine, cooling system seems fine,
1999 Saturn SL2 1.9L timing /starting VIN: 1G8ZK5274X
replaced valve and then put a new gasket kit on put every thing back together right tried to start it and it cranks but dosent start or make any noise. the valve was broken so we replaced it and put every thing back together and tried to start it first we put ...

Fixes & Summaries for GM
Fix/Summary Answers
1969 Cadillac CoupeDeVille 472CID Fuel Gauge
Thanks Iatn Members for your help! Many replys helped me to test the circuit. My coworker and another former coworker and I thought that a full gauge reading was a result of the circuit from the level send unit being grounded. All of the replys corrected...
1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G6CD5338L
After determining the problem was internal, the customer decided not to spend any more money. I was later informed that he took the car to the dealer and lo and behold was told he needed to replace the engine! Thanks for all the help! Trouble codes: 52 (ecm memory reset).
1989 Chevrolet C1500 Cheyenne 4.3L P/S Pump VIN: 1GCDC14Z8K
i would like to thank all of you for you time. i rechecked everything that was sugested. all brackets and mounts looked fine so put a new pulleyon it. im not sure this was the fix because i saw nothng wrong with the other one. im just keeping my fingers crosse...
1994 Chevrolet S10 4.3L 4wd VIN: 1GCDTP1W3R
After reading the responses I got I rechecked the connector on the encoder motor and found some very slight corrosion, cleaned the terminals, applied some dielectric grease and everything has been fine since.
1996 Chevrolet K1500 Cheyenne 5.7L Engine VIN: 1GCEK19R7T
I checked injecter flow, checked for vacuum leaks, did a vacuum test on motor, changed distbuter cap, and checked distibuter for play and found no problems. Custumer does not want to go any farther at this time. He spoke to a friend of his who had the same pro...
1997 Chevrolet C1500 4.3L master cyl VIN: 1GCEC14W5V
we bleed the brake system 5 times and got out most of the air, the pedal was still spongy but did not go down to the floor anymore. the customer took it with out any futher repairs.
1997 Chevrolet K1500 5.7L Poor Idle Quality, Hesitation, MIL Lamp on
well, happy to be able to post another fix. bruce [...] hit the nail on the head. he said to make sure that the o2 harnesses were not crossed up. if you look real close there is a white tracer on two of the wires, otherwise the harness looks the same. put o... Trouble codes: P0131.
1999 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W5X
Thanks for the replies. Most people suggested putting in line fuses on each circuit powered by this fuse to narrow the search down. One person nailed it and said they had a crank sensor wire rub through. While vigorously wiggling this I found mine had rubbed t...
1999 Chevrolet Express 3500 5.7L Stall VIN: 5B4KP32RXY
This one was a weird one. What I did was ran my own wires for the IAC outside of the factory wireloom. At that point the IAC was going to the positions it was supposed to be at and my scantool was able to manually open and close the IAC. I inspected the origin...
2000 Chevrolet Impala LS 3.8L tcc VIN: 2G1WH55K3Y
We replaced the PCM and that's it, it's fixed. We checked a few grounds first, but the new PCM cleared everything up. Everything is back to normal.
2000 Chevrolet C2500 5.7L Misfire, MIL Lamp on
Again thanks to all who replied. I hope nobody ever gets to be as lucky as I am. On monday morning 5/9/05 I rechecked my work and made sure the coolant leak was gone and it was. no more coolant was getting into #1 cylinder. So I checked it as I would a new veh... Trouble codes: P0301 (cyl 1 missfire).
2000 Chevrolet Silverado 1500 5.3L Fuel Gauge VIN: 1GCEK19T1X
Hello. I had an overwhelming response to replace the sender. My problem was that I never saw a problem with the gauge. Most said that additives cause the problem with either coating the sender or causes a sand paper effect. I droped the tank and pulled pump an...
1992 GMC C3500 HD 7.4L No Start, no comunication VIN: 1GBKP37NXN
Finnally it's fixed!! I held off posting this most recent fix as I was waiting for the customer to get back to me on how it ran. He came in yesterday and said it ran better than it has for a long time (couple of years). This is what I did: One replaced the d...
1999 Oldsmobile Alero GL 3.4L MIL Lamp on VIN: 1G3NL52EXX
The customer has not returned with a problem yet. The consensus seems to be that the ignition switch would be the most likely culprit.
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