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Prev Professional Automotive Repair Technical Discussions for November 11, 2004
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Open Help Requests for GM
Help Request Answers
1986 Buick Electra T-Type 3.8L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G4CF69B6G
veh. will not start attempts to hit, then wait a little then it will fire up and run fine, then attempt to accel. and back fires misses as if out of time, dies wont start, runs good when wants to, then dies, attempt to start acts as if its out of time. need he... Trouble codes: 42 (est malfunction)
1999 Buick Regal GS 3.8L noise in driver side font VIN: 2G4WF5216X
I have one giving me real a problem. I don't like to throw parts at them to fix them, but thats where I'm at with this one. It's got a "popping/creaking" noise coming from the drivers side front suspension(?). So far, we have changed the axle 2 times, lower ba...
1985 Cadillac Eldorado 4.1L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G6EL5789F
This Caddy is driving me nuts. I have tried 2 computers and a prom. It has set just about every code that is possible.. What are the odds of having all of them go bad at the same time?? not too good.. I have measured the grounds and the power all of which seem... Trouble codes: 18, 19 (crank signal open / fuel pump circuit), 22, 23 (open tps and est bypass), 25, 30 (modulated displacement and isc motor failure), 34, 35 (map sensor and baro shorted), 44, 45 (o2 sensor lean and rich), 51 (prom error)
1988 Chevrolet K2500 Cheyenne 5.7L No Start VIN: 1GCFK24K0J
Lunch Time!! This truck was towed in with a no start cond. The truck died while driving. I have good spark and no fuel injector control and a working fuel pump. I did the scratch test on the purple and white wire ( Dist Ref ) with a test light on B+ and the in...
1994 Chevrolet Beretta 3.1L starts & dies VIN: 1G1LV15MXR
hi this car will fire and die will not run more than two seconds i can keep it running with carb cleaner i have checked injector wiring for short i replaced both crank sensors & i changed injector with good used set.customer replaced ign module & cam sensor & ... Trouble codes: 82 (3x signal error in history)
1996 Chevrolet Express 1500 5.7L fuel gauge VIN: 1GBFG15R4T
Hello group, as mentioned below the original complaint was intermittent fuel gauge inop. Faulty sender diagnosed and replaced by another shop. Customer complained the tank would be empty when the gauge said 1/2. They then installed an O.E. tank unit. The gauge...
1997 Chevrolet C1500 4.3L Misfire VIN: 1GTEK14W8V
i group, this truck have an misfire when the rpm reach 2000-2500,and the problem occur on the cruise without an engine load. Misfire on cyl 3-4 and the problem disapear when the engine have a load. The tp is at about 7-10 degres and with the snap shot we can s... Trouble codes: P0300
2000 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1GG1ND52J0
Hi. Need some advice/direction here. Have a well maintained, low mileage car with no symptoms whatsoever other than the MIL light (P0403). We ran the diagnostics for the trouble code and everything seemed ok, so we replaced the EGR Valve. The code was pending ... Trouble codes: P0403 (EGR Pintle Position Error)
2000 Chevrolet Tracker 2.0L Poor Idle Quality, Stall VIN: 2CNBE18C8Y
runs rough and stalls when put in gear. turn idle up drops back done on its own. no vaccum leaks.timing ok.
2003 Chevrolet Tahoe LS 5.3L Radio VIN: 1GNEK13Z33
Hello gents, thanks for your time. This particular vehicle is my own, hate working on my own. The problem is quite obvious, it blows the radio fuse in the underhood PDC, no rhyme, no reason. Put a new fuse in and it last about 4 days or so, then poof. The only...
1998 GMC Jimmy Envoy 4.3L HID headlamps
Have one headlamp that will not light but does flicker when trying to start-up. The information that we do have suggests that the ballast will shut down if the voltage required to maintain lamp operation after initial start-up is above 600 volts ac. We were wi...
1988 Oldsmobile Cutlass Ciera SL 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 2G3AM1135J
This oldsmobile will start up cold, have a nice high idle and when it settles down to base idle speed it dies. It will start right back up and repeat the process about five or six times until it is warming up. If the throttle is kept open, it will stay running...
1996 Oldsmobile Aurora 4.0L headlights VIN: 1G3GR6ZC2T
The headlights on this car blink erratically when the switch is turned off. If the lights are turned on they work just fine, but when the switch is off they flash off & on. This car has Daytime Running Lights and Twilight Sentinel, controlled by a Lamp Control...
1978 Pontiac Firebird 5.7L rear springs
I am putting the rear springs from this car under a 1952 GMC panel wagon.The question I have is what is the measurement between the front spring and rear spring mounting bolts(on frame-not spring).I do not have donor car and have been unable to locate one for ...
1991 Pontiac Sunbird LE 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G2JB11T8M
when the car is in open loop idles great, but once in closed loop the integrator number 128 drops down to 90 - 95 and the block learn follows. Idle gets so bad it stalls and then fires up no problem. when o2 is unplugged the car idles good but then its in open...
1995 Pontiac Firebird 3.8L security VIN: 2S25222138
dear techs, vehicle will not prefome bulb chrck with key in on possition insterment cluster lights only come on with key in start possition only security light flashes no code not familure with gm cars please help
1997 Pontiac Trans Sport 3.4L speedometer VIN: 1GMDX03E1V
A local transmission shop called me to look at speedometer that on the hoist starts working in drive after about 20-30 seconds and then shifts fine. Speedometer works instantly in reverse. Scoped the pattern of the VSS at PCM, looked perfect, in D and R. Trans...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L Transmission VIN: 1G4CW52L6R
Thank you all for the very valuable information. I sold a new Jasper Transmission. I explained to customer that there is no telling what we will find on tear down for a rebuild. He just wanted vehicle back so we will R&R with Jasper trans. When I get it down I...
1996 Buick Regal Custom 3.1L Excessive Emissions, Poor Idle Quality, Misfire VIN: 2G4WB52M4T
Thanks for all of the replys on this one. It turned out to be a blown intake gasket. I would have checked it sooner but it didnt act like a blown intake gasket and using propane picked up nothing. We removed the oil fill cap and it had a small vacuum on it. Yo...
1997 Buick Park Avenue 3.8L fuel guage VIN: 1G4CW52K3U
Thanks again! 18 replies the first day, and all right on track. It seems the cluster can be replaced without reprogramming, may have dip switches on back to be set. However, most replies stated moving the needle back around would fix. Some suggested a wire or ...
1996 Cadillac DeVille 4.6L Surge, Misfire, Slight bucking 30-50 VIN: 1G6KD52YXT
The replies for this vehicle were tremendous and I can't do justice in summarizing them. Checked ignition system even though it was new, tried new MAP sensor, Linear EGR valve, and replaced both upstream oxygen sensors. Most responses said that these engines h...
1988 Chevrolet Beretta GT 2.8L No Start VIN: 1G1LV11W2J
well guys I Have finally got this one running and I have to be honest heres what I found. The wires on the crank sensor connector were hooked up wrong, the bad part is I put the connector on, well the wires were pretty discolored from oil and heat ,and I hooke...
1993 Chevrolet C2500 Silverado 6.5L overdrive VIN: 1GCGC29F5P
Thanks for all the great help. It turn out to be the pressure sensor, but meanwhile it has burned up the overdrive, so we replaced it with a SERTA from GM thanks Chris
1999 Chevrolet C1500 Suburban 5.7L Courtesy Lights VIN: 1GNFC16R4X
It had been 6 months since the problem started and I had the fuse out. When I had put the fuse back in 1 week ago the lights were working properly and Still are. Thanks for the advise.
2002 Chevrolet Impala LS 3.8L Poor Idle Quality VIN: 2G1WH55K42
it didn't take much of a test drive, won't due over 30 floored and awful back pressure sound. removed the converter, front was coated with a black looking substance. wish i knew where that came from! the car runs fine, but the cause of the converter failure ma...
2004 Chevrolet COLORADO 3.5L sir light coming on VIN: 1GCDT13634
Sorry for the delay in closing my post. I got some very good responses to this problem I would like to thank all the guys that spent time on this. After reading all the replies my concerns about modification to the SIR system where confimed. The sensor under t...
2000 Oldsmobile Alero GLS 3.4L MIL Lamp on VIN: 1G3NF12E9Y
4 Replys. This is a weird one. Car came back in a week later and I was asked if I could replace a burnt out headlamp. I turned the lights on to see which one was out. It was the hi beam on the passenger side. I left the lights on while I pulled the capsule out...
1997 Pontiac Trans Sport 3.4L Misfire VIN: 1GMDX03E8V
hello all,well as luck would have it yesterday i received another 97 transport with a bad intake first thought was to steal a inj.from it and use it on the other one since most replies pointed towards the inj. being bad or cloged.but as i was looking... Trouble codes: P0300.
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