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Prev Professional Automotive Repair Technical Discussions for August 24, 2004
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Custom 3.8L air vents VIN: 1G4HP53L6P
The problem we have is that when going up a upgrade on cruise control with it on or off the air fades out from panel vents to defrost vent then comes back to panel vent. We have run all Alldata test. We founded the Vaccum tank to have a hair line crack. We rep...
1998 Buick Century Custom 3.1L Misfire, MIL Lamp on VIN: 2G4WS52M4W
Vehicle came into the shop with the mil light on. Code P300 for random misfire. Check Misfire History and found one cylinder had a History of misfires. Cyl # 4. Vehicle wasn’t missing at all by the time it came to the shop. Checked Ignition system wires and co... Trouble codes: P0300
1963 Chevrolet corvair 2.4L powergluide VIN: 30927W2417
This is a request to help a customer with a transaxle leak. After sitting for a week or so it will leak trans fluid out of the top of the transaxle. It has the right dipstick and is not overfull. Any ideas or suggestions would be greatly appreciated.
1965 Chevrolet el camino 327CID intake backfire VIN: 135805K169
customer has had a backfire in engine on #3 (found by disconnecting #3 wire and having intake popping stop) when cold (does not occur when fully warmed-up) on accel since purchasing vehicle, a: 1965 elcamino 327-4v 250 hp, a/t, msd elect dist w/remote coil. af...
1996 Chevrolet Monte Carlo Z34 3.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WX12X1T
Car came in with intermittant ck engine light on, found code p0172b (fuel trim rich), Cleaned fuel injectors, did a engine decarbonizing, check O2 sensor(switching from 75 to 890), ck'd for all vacume leaks and found none, changed fuel filter, news Oem Plugs a... Trouble codes: P172
1997 Chevrolet Cavalier 2.2L drl VIN: 1G1JC1245W
Car had trans OH at another shop, was returned because the DRL indicator light on the IPC was flashing on & off. The DRL lights do not come on either. I did some tests, found that the DRL Relay control from the IPC (Ground) is not adequate to activate the rela...
2002 Chevrolet Venture LS 3.4L Rear Tire Wear VIN: 1GNDX03EX2
This van eats rear tires, even though the alignment is well within tolerances. It was aligned last year at the selling dealership, and they shimmed the rear wheels, and installed new tires at that time. the tires were rotated at 6000 miles. Now at 8000 miles m...
1993 Geo Tracker 1.6L Starting VIN: 2CNBE18U1P
Hello everyone, got this tracker that blows #8 fuse, the fuse is marked ingnition, when the fuse is good it runs, but will blow fuse and stop running. It is intrementent and blows at any time, if anyone has seen this or have any ideas I would appresiate thanks...
1992 Oldsmobile Cutlass Supreme S 3.1L No Start VIN: 1G3WH14T6N
new customer-car comes in on hook. no start. fuel pressure good, noid lite yes, no spark at all. scanner shows 9999 rpm all the time-engine being cranked or just koeO. crank sensor passes resistance and voltage test-condemed ignition module. we now have spark ...
1999 Oldsmobile Aurora 4.0L tcc VIN: 1G3GR62C8X
This is the boss's car and we're unfamiliar with this problem as we mostly work on flight line trucks, etc. The SES light comes on and we have code P0741. (TCC System Stuck Off) I took the car for a drive and manually engaged the TCC with our Genisys scan tool...
1996 Pontiac Grand Am SE 2.4L Cuts out, MIL Lamp on, dies, restarts VIN: 1G2NE52T4T
Hey pontiac guys, this car came into me a few months back with a check engine light on, dieing intermittently. when the car dies, you can pull it off the road, and it will restart every time. the check engine light comes on with a crank sensor code stored in m... Trouble codes: P0335
1998 Saturn SW2 1.9L No Engagement Reverse VIN: 1G82K8272W
Saturn Techs: Our shop (trans Shop) has a problem with a just overhauled trans. Tech has been back in to the unit again. Same problem after overhaul no reverse. Original problem was TCC realated and it had gotten Very Hot.. We have used a new Saturn vavle bod...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac DeVille 4.9L Poor Fuel Economy VIN: 1G6CD53B2M
Hello everyone, replased trans indicator switch like most of you said, also it corrected fuel mileage. Thanks for all the help. Trouble codes: 91.
1987 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GCDM15Z1H
i had recieved 9 replys...many thanks guys`...most replys where for possible egr problem and/or map sensor related problem. had checked and rechecked those avenues. everything tested find. was advised to pinch-off fuel return nose. engine idled normal. pulled ... Trouble codes: 33 (map sensor high voltage), 34 (map sensor low voltage).
1989 Chevrolet S10 2.5L Excessive Emissions, Poor Idle Quality, Surge, Stall VIN: 1GCBS14E5K
The fix for this S-10 was a new computer. After the installation of the computer everything worked fine. The computer was most likely calculating the fuel delivery incorrectly. Other factors in the repair were the IAC and Electronic Ignition Pickup. The IAC pi...
1996 Chevrolet K2500 Suburban LS 7.4L rotors VIN: 1GNGK26JXT
Thanks for all the replies...We went with the cross drilled rotors and factory pads. Double checked the rear brakes and we will see how that does for us.
1997 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality VIN: 2G1WX12X4V
Thanks to all the guys who replied, But gerry form Michigan {GO BUCKS} hit it right on the nose. We did check for vacuum leaks we checked the ground side of the tp circuit and came up empty. But disconnecting the battery cables and touching them together made ... Trouble codes: 122 (tp sensor or app sensorb ckt short), 1122 (tp ckt intermittent high voltage).
2000 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK5284Y
I rechecked the wiring for continuity and shorts. I also checked pin fit at solenoid and ecu. I have condemed the ECM. Waiting for approval Trouble codes: P1656 (The PCM detects an open or a short in the CMP actuator solenoid control circuit.).
2000 Chevrolet Express 2500 5.7L Hesitation VIN: 1GCGG2557Y
Sorry for delay in posting fix.Customer cringed at the cost of the maf and decided to run the van for a few days with maf unplugged to confirm problem was gone.I called him this morning and he says new maf fixed the concern.apparently his brother in-law works ...
2000 Chevrolet Camaro 3.8L Head light switch VIN: 2G1FP22KXY
I rechecked all hdlt wiring,current draw etc. All ok. I wired in a separate ckt brkr and a relay. The head lt switch now powers the relay coil in the hdlt position. The ckt brkr in the hdlt switch protects the relay coil.The ckt bkr I wired in feeds the relay ...
1990 Oldsmobile Cutlass Supreme 3.1L alternator VIN: 1G3WH54T3L
Thanks to all who responded.The car has a couple thousand miles on it now with no problems.Could find nothing to explain the immediate failure of the first alternator I had installed.Many suggested volt drop tests which were done prior to posting.Inspected the...
2000 Pontiac Firebird 3.8L MIL Lamp on, default throttle VIN: 2G2FS32K7Y
The vehicle did not act up again and it passed all testing that I had done. The cables for junction block were clean and tight and voltage drops all looked fine. The owner was being difficult so to try to make them happy and prevent a comeback I teed in a alte... Trouble codes: P0443, P0449, P1518, P1546.
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