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Prev Professional Automotive Repair Technical Discussions for May 17, 2006
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Open Help Requests for GM
Help Request Answers
1987 Chevrolet S10 2.8L No Start VIN: 1GCCS14R6H
Vehicle came in to our shop as a no start the day after it was at a Transmission shop for repair, found the only way to start vehicle is by advancing timing to about 48 Degrees, if you try to adjust lower the vehicle will die, at about 20 degrees the vehicle d...
1992 Chevrolet Blazer Cheyenne 5.7L No Start, Stall VIN: 1GNEK18KXN
truck was towed in saturday my day off . it died while driving . my boss worked on it found no spark , no injector pulse with noid light and spark tester hooked up . replaced modual in dist . truck started run kind bad so they recomended tune up . done tune up...
1998 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1947W
This vehicle came in originally for a no start, no crank condition. It had a p1626, we replaced the ignition lock cyl. and switch, it then started fine. Test drove the vehicle over a couple of days, to make sure everything was OK, everything seemed fine. We le... Trouble codes: P1626 (Theft code fixed with new lock cyl. and ignition switch)
1999 Chevrolet S10 4.3L tcc VIN: 1GCCS14X3W
I checked for codes, p0740. Cleared code. The trans will act normal and shift fine, lockup and all. The code will set if you use the brakes to slow or stop. If you coast to a stop, no code. With the code set everything works but lockup. There are no other prob...
1999 Chevrolet Silverado 1500 5.3L starting VIN: 1GCEC14T7X
hello all gm techs. i have this truck in the shop with a no start situation. the customer had the fuel pump replaced 2 weeks ago and the truck started and ran great for a week. last week the truck was towed in with a no start. they stated it just quit while dr...
2002 Chevrolet Express 3500 5.7L braking system VIN: R621111473
Hi gentlemen This truck is pulling dangerously on the right side when braking, we have to steer on the left to keep the truck on the road. It's a 4 wheel abs with 3 sensor, the rear brake are new and well ajusted, the front brake are in a good condition. we b...
1995 GMC Yukon 5.7L Stall VIN: 1GKEK18K1S
Interesting one here. The truck lacks power badly on accel until you hit about 2400 rpm and then it runs like a top. It stalls quite frequently at stoplights and under hard accel from a stop. It sputters and dies. No codes, fuel pressure is normal, and spark d...
1996 GMC C2500 Sierra SL 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 1GTGC24R8T
Truck idles rough and is burning rich .Had code for map sensor replaced that and the plugs where fouled black so replaced them and removed throttle body and cleaned that .The customer said he was just driving and it started idling rough at stops and black smok... Trouble codes: P0106
1998 GMC Jimmy Envoy 4.3L Vent Tube VIN: 1GKDT13W2W
Received this vehicle from a fairly new customer. Recently had transmission flushed at a quick lube facility and now after approximately 12 miles of driving it begins to blow fluid out the breather vent onto the exhaust manifold and ignition wires. I suspected...
1998 GMC Savana 2500 5.0L abs VIN: 1GTFG25MZW
Hope you GM Techs can help. We have this 98 GMC van with the abs lamp on. We checked for codes and found the following. C0035, C0036, C0037, C0054. These codes were pulled using the Genesis. I read with interest about the VCM being cracked and corroded and thi...
2000 GMC Jimmy Diamond Edition 4.3L 4wd transfer case VIN: 1GKDT13W1Y
I have a 2000 jimmy with 4wd problems. The problem is that you can make only one range selection per key cycle. For instance, when you start the vehicle it will be in 2hi. You then can activate 4hi, 4lo, or auto 4wd. It will successfully go into the range sele...
2003 GMC Sierra 3500 6.0L Misfire VIN: 1GDJC34V23
Hi group. We are having a real difficult time to fix a code P0300.GMC 3500 truck. MISFIRE IS ONLY DURING IDLE. On scanner shows misfire on #7 and #8 cylinder. As soon as I raise the RPM TO 1300. MISFIRE DISAPPEARS and engine runs smooth. other repair shop repl... Trouble codes: P0300 (testing and results)
1997 Pontiac Grand Prix SE 3.8L Stall
Hi All !!! We have a 97' Grand Prix w/ 3.8L S/C That will start for a few seconds and then stall. If I keep it reved up it will stay running. ( have to really rev it ) I unplugged the Fuel Pump plug, near the tank and put power to the pump with a jumper wire a...
1999 Pontiac Grand Prix GTP 3.8L Radio display VIN: 1G2WR5212X
Just would like to know if anyone knows if there is a fix to a radio display inop prob. I know this is very common prob. to pontiacs but have never tried to fix till now. The time and radio station is visible if light is on it just right but radio display itse...
2001 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW54R71
PO134 bank 1 sensor 1 low activity 02S. misfire shows on scanner cylinder #6 constant but runs good. swapped plugs with two cylinders and test coil output. coil is fine and plug swap made no difference. misfire still on #6. Tested resistance and flow of inject... Trouble codes: P0134

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Park Avenue 3.8L Excessive Emissions, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G4CW53L8M
Thanks for all the help on this I needed some extra info IATN did just that. It was the PCM! and i pushed for remaned 189.00 he got used 40.00 and it work fine all the reading were normal and no codes! thanks John J Trouble codes: 15 (coolant), 16 (batery volts), 21 (tps), 23 (air temp), 58 (anti theft system), 68 (cruise system fault).
2000 Cadillac DeVille 4.6L brake lights VIN: 1G6KD54Y3Y
Thanks for your help on this. There was only one person who actually read the help request. As I stated the wire was missing from the harness from brake switch to hazard module. The repair was just adding the circuit into the harness and all brake lights worke...
1984 Chevrolet Corvette 5.7L Hesitation, MIL Lamp on VIN: 1G1AY0788E
Thanx again for the help you chevy vette guys we installed a used distibutor and the random misfires went away the ecu coun not relearn itself so we installed a G.M. reman ecu drove it 15 miles on the freeway seems to idle and run pretty good thanx again IATN ... Trouble codes: 22 (tps too low).
1995 Chevrolet S10 LS 4.3L ABS module VIN: 1GCCS19Z8S
As it turns out it needs the brake control module which is only available as a complete unit with the modulator for about $1300.00. The customer opted to fix it at a later date.
2002 Chevrolet Avalanche 1500 5.3L Stall, Misfire VIN: 3GNEK13T22
Well guys, its done. I really cant fully explain the how and why, but I can tell you what fixed it and how I came to the diagnosis. I had another truck come in yesterday afternoon, with the same engine( vin T 5.3l). I noticed that when I started it, it revved ...
2003 Chevrolet Impala 3.4L air bag light VIN: 2G1WF52E93
Sorry for the long wait,but the owner of this car was using it 'as is' for a shop vehicle. The fix was a BCM once some power door lock and trunk relase problems surfaced. He himself troubleshot codes B3128,3247 for those and called the BCM bad. He then had the...
2003 Chevrolet Silverado 1500 5.3L drive train VIN: 1GCEK19T03
i found the shocks were weak and one of the rear tires had seperated a little. the two problems together cuased the 'miss' feeling. i replaced all 4 shocks and we had 2 new rear tire put on the truck. i drove it and it runs good now.
2004 Chevrolet Express 1500 4.3L No Start VIN: 1GCFG15X94
Yes, it was a timing problem as several of you suggested. The distributor now has a press on steel reluctor ring to bolt the rotor to. Well guess what? It doesn't press on good enough! It turned on the shaft, throwing off the timing. Problem was, when it came ...
1989 Geo Metro LSi 1.0L engine VIN: JG1MR2160K
Thanks all. Ron from california was right, the restrictor in the block fell out during the rebuild. When you pull the head, the restrictor just sits in the oil passage in the block and they fall right out. What happens, is, you drive and it pumps too much oil ...
2000 GMC Safari SL 4.3L lighting VIN: 1GKDM19W0Y
This turned out to be caused by chafed wires at the trailer connector splice. Initially, the trailer wiring looked okay but closer inspection showed the fault. Thanks to everyone that responded.
1993 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HY5316P
well i checked and rechecked all of my wiring notes and ressistance values and replaced the pcm and prom and everything was happy again and no more codes this is in my mind was a real pain but all the systems affected went back to the same place so pcm just fo... Trouble codes: 99 (power management problem), 69 (high pressure switch circuit), 68 (cruise cont. command problem), 65 (cruise cont. servo position sensor), 67 (faulty cruise sw.), 66 (ac pressure sensorcircuit problem).
2000 Oldsmobile Silhouette GLS 3.4L abs VIN: 1GHDX03E0Y
Here is the update on this car, i had the customer come back and we swapped the front wheel bearings left to right as some suggested. Once complete, the abs light stated on permanantly and a code for open circuit to the right wheel was present. The customer wi...
2002 Saturn SL 1.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8ZF54812
Thank you very much to everyone that replied. There were 7 or 8 that hit the nail right on the head. This morning I sprayed some intake leak detector at the #1 intake runner, and sure enough it has a leak. Unfortunately, the customer declined to repair at this... Trouble codes: P0301 (Cylinder 1 misfire detected), P0507 (Idle Control System-RPM too high).
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