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Prev Professional Automotive Repair Technical Discussions for August 4, 2005
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Open Help Requests for GM
Help Request Answers
1998 Buick LeSabre Custom 3.8L Hesitation, Surge, Cuts out VIN: 1G4HP52K8W
were do i look for short to possstive at?fix some bad vac line Trouble codes: 1106 (map sensor voltagehigh)
1995 Chevrolet Blazer 4.3L ABS module VIN: 1GNDT15W1S
This customer called us and told us his brakes had failed on the highway, right to the floor after he heard a loud noise. He managed to get off the road using the E-brake (he was that scared) and called us to tow the vehicle. Upon its arrival at the shop, we d...
1997 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY2260V
wonder if i'm missing something here. p1416 sets intermittently for air injection bank 2. code has been very sporatic and right o2 was replaced in hopes for results about 2 months ago. in following the diagnostic routine, air flow from the "hoover" seems a lit... Trouble codes: P1416 (air injection bank 2)
1998 Chevrolet Tahoe LS 5.7L compressor VIN: 1GNEK13R2W
put vehicle in 4low and the light went out on dash switch, and compressor won't kick in.
2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W61
Hey Techs, This well maintained vehicle wil not accept re-fueling. Spits back through filler. Dropped the tank and the spring loaded restrictor is free and fine. Not too familiar with domestic but the "roll over valve" seems to be clear and the vent at the fo... Trouble codes: P0446
1988 GMC Safari 4.3L engine swap VIN: 1GKDH15Z3J
this is a first for me to have to pull a motor in one of these vans..either way to pull it looks ugly(mod method looks like a goose chase). i wanted to toss this out there to get some inputs on the best way to pull the motor
2000 GMC Sierra 2500 SL 6.0L fuel gauge, air bag light, horn VIN: 1GTGK29U6Y
Vehicle came in with multiple issues. 4 codes that keep coming back: P0122 TP or ACC Sensor 1 ckt shrt/low P0157 O2 signal low B2 S2 P0463 Fuel level sensor ckt sig high/open P1122 TP ckt intermintent low voltage The fuel gauge sometimes works, i wiggled the...
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEK19T9Y
Engine misfire #7 cylinder. Fuel pressure is fine. Tried swapping plug, coil & plug wire. Had converters checked at exhaust shop. Sometimes backfires under load. Cleaned injectors & problem went away for about 20 miles of driving. Read a service bulletin for w... Trouble codes: P0300
2005 GMC Canyon Z85 SL 3.5L transfer case VIN: 1GTDT196X5
my father inlaws truck will go into 4 wheel drive by itself and 4x4 light will also come on. does it intermittenly, but seems to happen while driving 10 mph or less and mainly while making left hand turns.
1995 Oldsmobile Cutlass Ciera 3.1L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on, chuggles VIN: 1G3AJ53M8S
This oldsmobile came in barely running. It sounds like it's running on 2 cylinders. We have replaced the cam sensor, crank sensor, MAF sensor, plugs, wires, ignition module, computer, and we checked the injectors to make sure they are all working. And still it... Trouble codes: P0341 (intermitant cam signal)
1998 Oldsmobile Silhouette Premiere 3.4L ABS & Traction Control VIN: 1GHDX03E1X
Hi everybody, This vehicle came in with both the ABS and Traction Control lights on. There is a hard code C1243 that returns as soon as the vehicle is started. The Snap-On scanner we use describes this code as: Pump motor ves sens ckt flt. However, no other s...
2001 Pontiac Bonneville SE 3.8L ambient temp VIN: 1G24Z541X1
fellow techs, I have a bonneville that will read normal outside temp when started up but will drop to low temp (9* to -30*f) after a few minutes and ac compressor will disengage. I have changed ambient temp sensor(5v at sensor) and instrument panel module . tr...
2002 Saturn SC2 1.9L Cuts out VIN: 1G8ZY12792
we got a 2002 saturn in that keeps cutting off. it checks ok at the fuel pump. the fuel filter is new. any help on why it cranks but does not start. with the low miles it does not make sense that a fuel pump would be bad. we are currently checking all the wire...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L comp, low freon VIN: 1G6KD52B9R
Thanx to all. Most said to install inline a/c filter. Did that. Have also had prob's w/my a/c machine (Snap-on)! Re-checked orifice (not clogged). I believe the prob. was my a/c machine. Must have gotten bad reman. comp. from Ranshu (not the first time but don...
1992 Chevrolet Astro CL 4.3L left front hydraulics VIN: 1GNDM15Z9N
Hi gang! Sorry this has been so long. I've been waiting for the customer to make up his mind. Can't blame him though, anybody woul have a hard time spending two grand on a two hundred thousand mile Astro. Most replies mentioned the problematic brake hoses and ...
1994 Chevrolet Impala SS 5.7L Starting VIN: 1G1BN52P1R
well it's fixed!!! thanks francisco, i kind of figured that some voltage drop testing would be my next step. i actually found two problems. the yellow wire that feeds voltage from the ignition switch to starter enable relay had been cut and spliced together......
1997 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G45DC2R0V
After pulling the plenum, number 5 injector was dead. My friend, who is now kicking himself, actually fixed the problem with the cpi unit but was not careful hooking up the plug and bent the connector prongs over on number 5 cylinder. thanks again all Trouble codes: P0171.
1999 Chevrolet Lumina 3.1L door locks VIN: 2G1WL52M6X
thank you for all your help. i just reprogrammed the key fobs and it worked fine after that. the not working after many lock and unlock switchs was just normal operation. thank you again.
2000 Chevrolet S10 4.3L Cuts out, Stall VIN: 1GCCT19W4Y
It appears that a varmint had his lunch on the tape and wiring below the fuse block. After cleaning out there homestead, and repairing the wires, the vehicle now works fine. Thanks for all your help ! Now, the real question is, do I charge the customer for an ... Trouble codes: 105 (maf), 105 (maf).
2002 Chevrolet Suburban 1500 LS 5.3L Fuel Guage VIN: 1GNEC16Z92
I replaced the sending unit as described, and the truck had the same problem, one thing I learned is with the Modis you can command the fuel guage up and down, and can watch the sending unit in put. I ordered a Instrument panel and still had the same problem(a...
2003 Chevrolet Silverado 1500 4.3L No Start, MIL Lamp on VIN: 2GCEC19X63
sorry i did not have much info to give but i had little to give i did reset code many time and as soon as i cranked the motor the codes would reset i finally got mod to send me some info after three calls and 2 days. with the info i found the bcm to be bad got... Trouble codes: U1300, P1626.
1996 GMC C1500 Sierra SL 4.3L peddle travel VIN: NOT AVAILA
thanks for the help guy's customer never came back i guess he dident think there was any thing rong with it. anyways my thoughts like most of you is that the problem was in the abs module ... thanks again guy's
1997 Oldsmobile LSS 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 1G3HY52K6V
We did try updating the ECM, however it did not correct the problem. After scope checking the ignition system and noticing a few cylinders were burning lean, we flow checked the injectors and found that flow on three injectors were high. We cleaned the injecto...
1990 Pontiac Grand Prix SE 3.1L low power VIN: 1G5WT54V1L
I tested this system over and over. It has to be the ecm bad. But what bothers me is I put a rebuilt in and no change. same problem. It seems highly unlikely that the rebuilt would have the same problem. For now i grounded the solenoid and try not to push it t...
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