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Prev Professional Automotive Repair Technical Discussions for October 18, 2004
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Open Help Requests for GM
Help Request Answers
1996 Cadillac DeVille 4.6L Surge, Misfire, Slight bucking 30-50 VIN: 1G6KD52YXT
Hello, Could use some help on this Cadillac. Seems like no one else is having the same problem by looking in the archives. In short the customer complains of a jerking sensation between 30- 50 MPH under light load. I am finally able to duplicate it on every t...
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1999 Cadillac DeVille 4.6L Excessive Emissions, MIL Lamp on VIN: 1G6KFS496X
I have a Evap code p0440 come back after we repaced the gas cap. It took quite a long time of driving before it came back on. Visual inspection service port cap on snug, valve core snug. Followed Diagnosistic chart to find step #4 running service bay test my s... Trouble codes: P0440
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1986 Chevrolet Caprice 4.3L smoking computers
i need a prom for this vehicle 1986 chev caprice 4.3 v6 vin z.external prom id is hwn/[...].
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1987 Chevrolet P30 Step-Van 6.2L No Start, Hesitation, Stall VIN: 1GCJP32J4H
This step van belongs to a buddy of mine, when it came in it was low on power and had a few oil leaks. He's trying to get this thing in tip top shape so he can cater with it. Anyway, I started fixing the oil leaks (pan, rear main, and front seal. While the pan...
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1988 Chevrolet Celebrity 2.5L aldl scan
intermittent extended cranking aldl scan could not be performed screen showed connection error tried different scan tool same result . hard start can occur hot or cold scan is same hot or cold have tried key scan a & b post on aldl same result no codes wiring ...
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1988 Chevrolet Corvette 35th Anniversary Edition 5.7L Mechanical VIN: 1G1YY2185J
Fellow Techs, thanks for for your help.With engine idling,warm & a/c on there is a very rough idle that feel like the engine is out of balance.With increases in rpm the roughness decreases.With the engine idling warm & a/c off it is much better though there i...
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1995 Chevrolet S10 2.2L Excessive Emissions, No Start, Poor Idle Quality, Misfire VIN: 1GCCS1440S
Cust has brought truck in for no start, checked fuel pressure 0 Psi,Replace fuel pump assy with delco unit and new strainer and filter. Truck is hard to start and after hold pedal to the floor truck starts and runs pig rich. Have replaced plugs and wires(oem) ...
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1995 Chevrolet G20 Chevy Van 5.7L speedometer VIN: 1GBEG25K1S
Hi This van looses its speedometer after a 200 mile drive. The speed falls to zero and the transmission goes to default. The vss sensor has been replaced twice. The speed buffer has been replaced. A search in the archives revealed a weakness in the pigtail so...
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1996 Chevrolet Cavalier LS 2.4L TCC release switch VIN: 1G1JF52T2T
Hello everyone and thanks in advance for any help with this one. This Cavalier is mine and when you pull onto the freeway, in a short distance the check engine light comes on and stores a P1887(TCC release switch). I have looked on alldata at the bewildering ...
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2001 Chevrolet Monte Carlo SS 3.8L stereo VIN: 2G1WX15K01
Hi all, I have thise MonteCarlo that came in for a battery draw, the battery will go dead if you let it sit for 1-2 days, I isolated the draw to the radio fuse, Mitchell shows 3 components on this fuse, the radio, the amp and a cd player remote playback device...
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2003 Chevrolet Astro 4.3L Starting VIN: 1GNDM19X33
We had two identical vehicles come in our shop last week. They both crank, but will not start. The security lights were both on, and a code P1626 was stored in memory. They would crank normal, and try to start but would not. We went out on Friday afternoon and...
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1992 Geo Tracker 1.6L No Start VIN: 2CNBJ18UXN
This tracker came in as a no/start. It will run on carb spray. To make a long story short,I have no power to the injector. If I jump battery voltage to the pos side of the injector,it runs. According to the diagram,the ecm powers up and grounds the injector. I...
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1994 Pontiac Grand Prix SE 3.4L power steering VIN: 1G2WJ12X6O
This vehicle came from another shop after they installed a rebuilt rack and pinion gear. The car now has power steering pump noise. The customer states this noise was not there before the rack was installed. We have tried installing two power steering pumps an...
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2001 Pontiac Firebird Formula 5.7L traction control VIN: 2G2FV22G01
HELP, My hair is getting thin! The owner of this car said traction control was working fine, than one day he hit a brick in the road breaking the left front wheel. After that the actuator shut down the throttle and would not open it again. codes in system were...
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1998 Saturn SL2 1.9L 2-3up sft 3-2dwn sft VIN: 1G8ZK5279W
I have searched the archives and found some similar problems but not quite the same as this one, so I'm asking for some assistance,please.Automatic transmissions are not my area of expertise. The vehicle came in with a no 3rd gear code(p0733)I cleared code and...
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2000 Saturn LS2 3.0L MIL Lamp on VIN: 1G8JW52R2Y
I have a current Genisis Scanner but it does not have and evap tests for this car, I think the problem may be the vent solenoid but not sure what to look at on this or how I can test this solenoid since my scanner dosen't test this. Gas cap was tight and appe... Trouble codes: P455
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L p730 VIN: 1G4HP54K6Y
Thanks to all for helpful information. Code P730 is a gear ratio fault. Gear ratio on the scan tool would go up to 1.08 and set the code with specs of .95 to 1.05 in 3rd gear. Gear ratio is calculated with input speed sensor & output speed sensor information. ...
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1997 Cadillac DeVille 4.6L No Start, MIL Lamp on VIN: 1GC6KD54Y4
Thanx for the replies! I fixed it by following the relearn procedure exactly! #1 make sure the battery is fully charged and no battery charger is hooked up during this operation. #2 cycle key on for 10 min.,key off for 10 sec.Doing this for 4 consecutive... Trouble codes: P1631, B2750.
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1992 Chevrolet C3500 Cheyenne 7.4L popping in intake VIN: 1GBJC34N9N
Thanks for are the help.I have not seen a worn cam only act up on the road.the cam was not totally wiped but in bad shape.thanks agian for all the replies. gary [...]
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1999 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCGK29U5X
Thanks too all who replied on this post,all the intell. from this sight is unblevable the best tool on my box!! thanks to Anthony [...] and J.J-Wisconsin you two had the fix., even after pulling the fuel rail and checking spray pattern and thinking all was good.... Trouble codes: P0300.
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2000 Chevrolet Suburban 1500 LT 5.3L istrument cluster VIN: 3GNFK16T0Y
Thanks to all that answered our problem. Most of you where right on the money about a ground issue. We found the ground at the left rear of engine block had only three strands of wire between the harness and eyelet..Could not handle the electrical load...again...
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2001 Oldsmobile Aurora 4.0L Starter VIN: 1G3GS64C41
We were able to nail the problem down this morning. With a test light on the purple solenoid command circuit we were able to confirm the scan data was correct and the starter was getting the command but not responding! The starter will be replaced tomorrow. Th...
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1996 Pontiac Sunfire SE 2.2L Starting VIN: 1G2JB1240T
After many days of driving an waiting to test,found pcm problem with ground.Replaced pcm and flashed has been good so far.
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1996 Pontiac Grand Am SE 2.4L instrument cluster VIN: 1G2NE12T7M
had to send to dealer to reprogram cluster. after reprogramming, dealer tech had trouble then did long relearn and car started.
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1996 Pontiac Sunfire GT 2.4L Cooling Systems VIN: 1G2JD12T9T
The customer never came back but most of you wrote that a plugged heater core is the commmon problem. Since there is no sufficient flow through it and the coolant temp sensor is near the inlet, it will make the temp flactuate
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2000 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB1244Y
Greetings everyone, The vehicle is fixed,thanks again to John Thorton at Protec. After testing crank sensor,with lab scope,I performed power and ground integrity to module.Vehicle had B+ and good ground unplugged,but when plugged in lost B+.Customer had instal...
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2000 Pontiac Bonneville SE 3.8L battery VIN: 1G2HX54K8Y
Hello everyone. After leaving the meter on overnight and unhooking one module at a time, it turned out that the RIM Module was not going to sleep at times. This was an intermitten problem, so it was tough pin-pointing it. Only able to work on it on weekends. T...
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2002 Pontiac Grand Am GT 3.4L Lighting VIN: 1G2NV52E82
Gooday Gentlemen, Well I recieved 9 replies stating that GM had trouble since 2000 with these switches--including the T/S switch. I contacted the Customer who is under lease and She has decided to return the car as is( She talked with Her Lease Agent and was t...
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