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Prev Professional Automotive Repair Technical Discussions for June 16, 2005
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Open Help Requests for GM
Help Request Answers
1995 Cadillac DeVille 4.9L level control VIN: 1G6KD52B7S
This vehicle came to me this first time, never been here before. The back end is up high and rides bouncy. The pump is inoperative and is not releasing pressure. There are no codes, and I can't find the correct procedures to diagnosis. I think I have a bad pum...
1995 Cadillac Fleetwood 5.7L Safety VIN: 1G6KD52B35
Hello Fellow Techs. Todays diagnostic dilemma comes from a 1995 Cadillac Fleetwood with a 5.7L engine. The customers complaint is that when he turns on the headlights (day or night), the Audible Warning Device starts beeping fast. If you insert the seat belt i...
1988 Chevrolet S10 Blazer 2.8L Poor Idle Quality, Hesitation VIN: IGNCSI8ROJ
owner says hesitates and has loss of power. test drove and verified. felt to be fuel related. tested fuel pressure before filter- ok, fuel regulator helped to restore power, but still has slight hesitation at light throttle sometimes. replaced fuel filter- no ...
1992 Chevrolet Astro CL 4.3L speedometer VIN: 1GNDM19Z6N
Hello all, I have a 1992 chevrolet astro van that keeps blowing the fuse for the brake. at first it was hard to get the correct pattern to get it to blow but what we found is that the vehicle has to run for 5-10 minuets and get fully warm before the fuse will ...
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W1S
Thanks in advance to everyone reading and replying to this request. I have this Chevy Blazer that keeps resetting code p0401. I can request the egr to open and at all %'s there is a change in RPM's. I took off the egr valve, it had a screen that was not blocke... Trouble codes: P0401
1999 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS1440X
This vehicle came in for a dyno smog. It originally failed for NOx at 15 mph with a reading of 876. Max is 533 ppm. After looking at all my PIDS using scan tool and no codes, using a scope on the O2 sensor with propane, checking for leaks using smoke machine, ...
2001 Chevrolet Express 2500 5.7L No Start, Hesitation, MIL Lamp on VIN: 1GCGG25R11
Hi everyone, This is been a good one, this van is a CNG factory installed setup, i don't know much about CNG other than what i read on GM TIS,when running on CNG,the van feels like it just runs out of gas, it idles ok and just off idle will be ok, but a small... Trouble codes: P0102 (MAF circuit low)
1992 Geo Metro 1.0L Poor Idle Quality, Hesitation, Surge VIN: 2C1MR6165N
Hi This Car has a severe lack of power and a slightly rough idle. The problem started immediately after a normal oil change service. The engine bogs with any throttle pressure ( anything more than very light acceleration). We have tested the primary/second...
2002 GMC Envoy SLE 4.2L Engine VIN: 1GKDT13572
This vehicle will stall at a stop light SOMETIMES! Only does it a couple of times a year. Sometimes it will start right up and others it won't. Let it sit and it will start up. Wondering if anyone has seen anything like this on this kind of vehicle. Also have ...
1998 Oldsmobile Intrigue GL 3.8L radiator fans VIN: 1G3WS52KXW
Hi thanks for any help, this olds radiator fans wont come on with or without the ac on, or unplugging the cooant temp sensor. we thought he pcm grounded the fan relay so after a relay didnt work we replaced the PCM and still nothing, we have power at the fuses...
2004 Oldsmobile Alero GX 2.2L All VIN: 1G3NK52F14
This vehicle has a slight vibration at idle in PND321. There is a heavy vibration in Reverse. Also when you turn all the accessories on and to the high positions, there is a vibration other than normal. The vehicle was in an accident 11,000 miles ago. At that ...
2000 Pontiac Grand Prix GT 3.8L overheating VIN: 1G2WP52K9Y
This car runs about 245 to 255 degress whet ambient temp is above 80 degrees while in traffic, when in clean air temp comes back down. It seems to me that is a air flow problem, but when fans are running air is pulled with good force through the grill. Could t...

Fixes & Summaries for GM
Fix/Summary Answers
1984 Buick Riviera 3.8L No Start
Ok so after all this pain and suffering I finally gave in and checked the timing chain and guess what? The cam gear had all the teeth stripped off of it. The thing that fooled me was the compression test I took being 150 around the board. I guess some times th...
1989 Buick Riviera Luxury 3.8L Cuts out VIN: 1G4EZ11CXK
Sorry about the long delay to close this post I did change the ecm and allis well thanks to all of you. Trouble codes: B0334, B0336.
1997 Buick Park Avenue 3.8L Blower motor VIN: 1G4CW52K5V
Well, it's fixed...Mike [...] and LilDog hit it right on the head with what was wrong and Mike was good enough to email me a wiring diagram that showed our mystery wire. Here's what happened: A mud wasp had plugged the drain on the AC evaporator causing it to f...
1997 Chevrolet Cavalier 2.2L Poor Idle Quality, Hesitation, Surge VIN: 1G1JC1246V
sure enough timing chain tensioner let loose, thanks guys and girls.
1998 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCEC19R1W
G`DAY ALL ! This one is out the door thanks to all the fast and informative info. didn`t realize that these units were sooooooo! touchy on fuel pressure! the pump would come up to 60psi and on crank drop to 55/58 psi. install complete assm as the gauge wasn`...
1999 Chevrolet Metro LSi 1.3L engine oil VIN: 2C1MR2229X
thanks for all the replies. i took all your advice and told them just to get rid of it. the car has already been replaced by the time i am writing this. thanks again.
1999 Chevrolet Venture LS 3.4L Misfire VIN: 1GNDX03E2X
This vechile is fixed, it turned out to be 2 things, module clean mass air flow got rid of the missfire in scanner, mostly the problem was the torque convertor locking up. The problem was it showed missfire at the same time as torque convertor locked up, very ...
2001 Chevrolet Cavalier LS 2.4L 1-2 2-3 3-4 shift VIN: 1G1JF52T91
It's fixed!!! The customer failed to tell us this was an ex flood car. I did a boo boo and kinda' passed over the TPS reading. It was 0.98v at idle. A new TPS brought it down to 0.48v. Thanks for the help guys
1999 GMC K1500 Suburban SLE 5.7L Misfire VIN: 3GKFK16R3X
Thanks to all who responded to my desperate cry for help on this problem.I recieved a surprising 22 suggestions from which I methodically read and thought about each and every one. It amazed me to realize that there really is loads of technical experience out ... Trouble codes: 0307 (7 cylinder misfire), 0300 (random/multiple cylinder misfire).
1982 Other GM Motor Home 454CID HVAC Blower Motor VIN: 1GBJP37W2C
Well, I got some good info on how to get to this motor. Bruce [...] mentioned the resistor, which due to circumstances was not verified. One person s...
1999 Pontiac Grand Am SE 2.4L Security VIN: 1G2NE12T6X
I didn't fix this vehicle.2 replies said to be sure to clear codes first. I had done that.My scanner would not read BCM codes so I couldn't check that part.One said computer needed to be reprogrammed. Told customer they would probably need to go to dealer. I h...
1999 Saturn SL2 1.9L fail smog VIN: 1G8ZJ5274X
Sorry it took so long to post but it is my wifes car and i have been very busy at the shop. I had originaly suspected the thermostat but i tested it quick (wifes car) with a temp gun in the shop and both hoses were 200 degrees. So i took a couple of sugestions...
2000 Saturn SC2 1.9L Unknown VIN: 1G8ZY1277Y
Hello Fellow Techs. I am happy to report that the 2000 Saturn SC2 has been successfully repaired and returned to the customer. Unfortunatly the used transmission that was installed in this vehicle was the incorrect transmission. It came from an SC1. Customer...
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