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Prev Professional Automotive Repair Technical Discussions for October 27, 2004
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Open Help Requests for GM
Help Request Answers
1994 Buick Roadmaster 5.7L no problem VIN: 1G4BR82P9R
What is the most mileage anyone has seen on a fuel pump? I've seen cabs and limos at auction with 800+ km, but I don't know if the pump has been changed. My customer bought this car brand new and has put almost 500 000 km on it without doing any major repairs....
1994 Buick LeSabre Custom 3.8L No Start, Cuts out, Stall VIN: 1G4HP5219R
The car came in saying that it would start and die, several times. then would stay running.I check for spark and fuel pressure, The car started right up the next morning fine. I scanned the computor system with Tech 2, found 2 history codes, 1629 and 1626. Rep... Trouble codes: 1629 (Pass Key enable cir.), 1626 (Pass Key 2 signal)
1998 Buick Park Avenue 3.8L oil warning lamp VIN: 1G4CW52L5W
hello, I have this Park Ave. that the customer is complaining of the oil warning light going on and the chime sounding for low oil psi. If you start the vehicle the oil psi on instrument warning center indicates 129 psi which is normal. If you accelerate in pa...
1998 Buick Park Avenue Ultra 3.8L oil pressure gauge VIN: 1G4CU5210W
customer took vehicle to another shop because digital oil pressure gauge was fluctuating,warning chime was sounding and warning light for oil flashing. this shop performed a manual oil pressure test and readings were to be good. this shop was not equipped to d...
1990 Cadillac DeVille 4.5L Poor Idle Quality, Surge, Cuts out VIN: 1G6CD5334L
engine ignition timing goes retard about 40 degrees from base timming. have to advance distributor just to idle engine.mechanical time correct.cam and dist gear ok.have to disconnect iac to keep from surge condition.
1993 Cadillac Fleetwood 5.7L Headlights VIN: 1G6DW5276P
Headlights and Parking Lights come on at anytime and stay on for a few seconds. This happens even with ignition off. By the time we start to run any checks, lights will go back off.
1993 Chevrolet Corvette 40th Anniversary Edition 5.7L Courtesy lights and RKE VIN: 1G1YY23P4P
Hi to all, as mentioned before in my posts, we dont get many of these around here! I have no data on this one, not sure where to start, as usual component location is part of the problem - dont want to have to strip unnecessary items!. Have checked basics like...
1994 Chevrolet C3500 Cheyenne 6.5L Speedometer VIN: 1GBKC34F6R
Greetings GM Technicians: This is 3500HD dump truck. Speedometer & Odometer work intermitently. "Note" when speedo & od do not register, brake warning lamp on dash is on but dim. We replaced vehicle speed sensor, no help. Thanks in advance Gene
1994 Chevrolet Caprice Classic 5.7L No Start VIN: 1G1BL52P5R
Repeated distributor failure Trouble codes: 16 (crank res low)
1994 Chevrolet S10 Blazer Tahoe 4.3L heater core VIN: 1GNDT13WXR
Need to know if there is any short cuts for R&R heater core on this blazer. Found one article in archives for '95-'00 for a short cut. Most older bodies I have done are easy and don't require dash removal. However according to alldata, starting in '92 dash nee...
1995 Chevrolet K1500 Cheyenne 5.7L Master/Slave Cylinder VIN: 1GCEK14K5S
Owned truck for 2 years. For about 6 months now, I have to "pump" the clutch pedal SEVERAL times a day just to get it to shift easy, otherwise it is a real chore to shift to 2nd at a stop. No leakage, and no fluid loss from Master Cylinder. Have flushed old br...
1997 Chevrolet C3500 7.4L Cuts out VIN: 1GBJC34J5V
fellow techs, i'm in a bind.(as usual)thanks in advance for any responses i recieve. this truck came in with an"always full"then"always empty" fuel gauge reading it has dual tanks.i could turn the key to the run position and it would show full,i turn it off,th...
1998 Chevrolet Tahoe 5.7L shift VIN: 3GNEK18R8W
The transmission on this vehicle will intermittently default to second gear. I've had other GM trucks do this with ign. switch problems i.e. low voltage to term. 20 in fuse panel. However, when this problem occurs the voltage is normal. It also doesn't exhibit...
1998 Chevrolet Blazer 4.3L compression VIN: 1GNDT13W4W
The truck that I am working on came in with a blown head gasket. After performing the head gasket and getting the engine put back together I had no compression when cranking. The only procedure that I can find is to adjust the valve's is to tighten them to 18f...
1999 Chevrolet C1500 Suburban 5.7L Courtesy Lights VIN: 1GNFC16R4X
This is on my personal vehicle. After the Doors are closed and locked the courtesy lights stay on for 40 seconds(normal operation) then go off. After 40 seconds the lights all come back on. This continues as long as the key is not in the ignition. I removed th...
1999 Chevrolet Tahoe 5.7L No Start, Misfire VIN: 3GNEC18R3X
Hello!! Everybody. This is not a help request, just for somebody in the future. However. you can still leave the comments if you have any opinions. I had this Tahoe came in for leaking coolant from intake manifold gaskets. After the repair has done, it did ... Trouble codes: P0300
1996 GMC K2500 Suburban 7.4L Poor Idle Quality, Hesitation, Misfire VIN: 3GKGK26J5T
this vehicle has me confussed so i will try and give you everything i have. replaced intake gasket and vehicle started running bad. fuel trim readings showed bank 2 running lean. + 50 long term reading and a + 10 short term on bank 2 only bank one readings wer...
1992 Oldsmobile Cutlass Supreme 3.4L pwr locks, seats, and anteena circuit breaker
good afternoon, i'm keif and i have this 92 oldsmobile cutlass supreme coupe 3.4 liter that will not allow me to operate the vehicle's power locks or pwr seat... first off, i'll you guys know that i am not real experience in electrical diagnosis and to explain...
1998 Oldsmobile Bravada 4.3L service AWD light one encoder motor VIN: 1GHDT13W27
Vehicle came in 2 weeks ago with service AWD light on and had code CO310 open transfercase encoder motor. Ran the flow chart from All Data and end result was to replce transfer cae control module. Light was off after replacing module so I shipped the vehicle. ...
1989 Pontiac 6000 LE 2.5L Surge, Cuts out, Stall VIN: 1G2AF51R7K
when engine temp is below 60 degrees, when accelerating to about 1/4 throttle the engine will either stall with a pop through throttle body or cut out revving from 1000 to 2500. as soon as the temp of the engine reaches 60-62 degrees f. it will run perfect. th... Trouble codes: 42 (est problem)
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 3G2JB5241T
Good day Tech's ! I have this 1996 Pont Sunfire thats burning me up. It's got a 2.2L with 95,000 miles. Complaint was CEL on and boggs at accelleration. The codes were PO171 System too lean and code P1171 Fuel system lean during accel. Fuel presure was at 43lb... Trouble codes: P0171, P1171 (Fuel system lean during accel)
1997 Pontiac Bonneville SSE 3.8L ride control VIN: 1G2HZ5215V
Hello, and thanks in advance! The customer brought his Bonneville in for a "soft ride". He's unable to switch from Luxury to Performance. I pulled codes for codes 26 and 33 for right rear strut resistance and switch problem. I am able to bypass components to a...
1997 Pontiac Sunfire SE 2.4L Steering VIN: 1G2JB12T2V
Hello fellow techs, I have this 97 sunfire with a strange problem. When the engine is running, you can't steer the car the left. It steers fine to the right. Turn the engine off, and you can steer both ways without a problem. On the lift, the wheels can be tur...
1999 Pontiac Bonneville SE 3.8L Hesitation, -20 FUEL TRIM VIN: 1G2HX52K5X
hello fellow techs, this bonneville belongs to me. it is in good shape and i purchased it 2 months ago. it runs well but at times has some tip in hesitation and intermittent hesitation after sitting stopped at a light. this hesitation is very intermittent and...
2000 Pontiac Firebird 3.8L MIL Lamp on, no throttle response VIN: 2G2FS22K8Y
I have an intermittent(only happened once)problem on this firebird. Yesterday on the way to work the owner said she was driving on the freeway when the car started to slow down all by itself. When she pulled over she realized that the car was running alright a... Trouble codes: P1125, P1276, P1281, P1286

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Regal GNX 3.8L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G4GJ1179H
Sorry for taking so long to close this. As stated in the request this is the boss' car. We work on his projects when things are slow, but were picking up now, so he's put it off for a while. As were comming in to winter in Michigan he wont be driving it for a ...
1997 Buick Park Avenue 3.8L Gas Guage VIN: 1G4CW52KOV
Hi Techs,all the replies I received pointed to the sending unit,I suspected that this was the problem but I wanted to make sure. After checking voltage and ground I replaced the sending unit. It amazes me that I haven't seen this particular problem before and ...
1991 Cadillac DeVille 4.9L MIL Lamp on VIN: 1G6CD53B0M
i am embarrassed to post this fix - overlooked the obvious . read in archive where wires for cam sensor were in wrong location checking the pigtail all seemed correct - the harness was plugged in backwards - oooooooooopppppppppppppssssssssss Trouble codes: 41 (cam sensor).
1997 Cadillac DeVille 4.6L Blower motor VIN: 1G6KD54Y8V
Thank you for you help on this one. As it turns out my snap on shop key system information was wrong. The voltage reading from the ACM to the blower motor are wrong. we had the correct readings the whole time. Customer took the blower motor back to cadillac an...
1999 Cadillac DeVille 4.6L Excessive Emissions, MIL Lamp on VIN: 1G6KFS496X
I did not get to smoke the system but I believe my vent solenoid was stuck open. I cleaned and assembled system. Customer has driven 250 miles mostly hi-way and has not had the light to come on. Trouble codes: P0440.
1991 Chevrolet G30 Beauville 5.7L steering gear VIN: 2GAGG39K7M
Removed steering gear and cleaned frame off very well and found some hairline cracks around the frame spacers. Welded them up and replaced bolts with grade 8 bolts. Sent it down the road hopefully it won't return. Thanks to all who replied.
1995 Chevrolet S10 2.2L Excessive Emissions, No Start, Poor Idle Quality, Misfire VIN: 1GCCS1440S
Thanks to all that replied. I want to thank Mike [...] for his insight on the real problem. I checked the exhaust for restriction as suggested and of course is was slightly restricted. But as I stated in my post that there was noise in the front timing chain...
1996 Chevrolet C3500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4A3AX35G2W
Thanks to all who replied, everything from o2 grounds, to lower intake, to sticky valve guides. Owner decided to take back to the dealership and try to get warranty as motor was replaced not that long ago under warranty (hard to believe on a truck with only 40... Trouble codes: P0133 (HO2S1 Circuit slow response B1S1), P0135 (HO2S1 Heater Fault B1S1), P0137, P0141 (HO2S2 Heater Fault B1S1), P0155 (HO2S1 Heater Fault B2S1), P0340 (Camshaft Position Sensor Circuit).
1996 Chevrolet C1500 4.3L very long crank time VIN: 1GCEC14WOT
Thanks everyone I replaced pump and fixed problem I still think the regulator is leaking but customer is selling truck THANKS AGAIN STEVE
2001 Pontiac Grand Am SE 3.4L anti-theft enabled VIN: 1G2NF52E7M
The overwelming responses suggsted an intermittant magnet in the lock assy. The customer declined to have it installed, but said he would bring it back and have the work done if the problem re-occured. I printed the reset procedure and he was very content in t...
2001 Pontiac Grand Am SE 3.4L turn signals, hazards VIN: 1G2NF52E21
replaced multi-function switch, works fine. Thanks to everyone that replied.
1997 Saturn SL1 1.9L No Rev or 2nd VIN: 1G8ZH5281V
Sorry I did not close this sooner, got a reman and put it in. The day after I got it in had to go back to Wi for funeral for got to close when got back. Well from the replies that I recieved I truly belive it needed a new valve Body do to cost of valve body an...
2000 Saturn SL1 1.9L Excessive Emissions, fails nox VIN: 1G8ZH5283Y
carbon build up was problem. I had a can left of the old (good) GM top engine cleaner left and used this, heavy in cylinder 4. An hour later fired up, drove, rechecked and now have 0 nox. Christopher [...] asked about fuel trim in his reply. It was very sli... Trouble codes: 0300 (multiple misfires).
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