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Prev Professional Automotive Repair Technical Discussions for April 17, 2006
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Open Help Requests for GM
Help Request Answers
1990 Chevrolet C1500 Cheyenne 5.7L slow start VIN: 2GCEC19K3L
The truck was brought in with a horrible rough idle,so after checking the timing and wire resistance(both were fine. I did a fuel pressure test and it was at 15 pounds. So I pulled the fuel filter and promply poured out two tablespoons of dirt. So I decided to...
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1990 Chevrolet Lumina 3.1L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2G1WL51T4L
Hope some one can shed some light on this one. The situation: Vehicle came in with engine running on 4 cylinders. Customer said it would run rough intermittently. I connected interro ign scope and found no spark kv from coil 3/6. I connected lab scope/curr... Trouble codes: 33 (MAP sensor high)
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1995 Chevrolet Lumina 3.1L Pass Key VIN: 2G1WL52M3S
This car is a intermittent no start. When fault occurs, there is no ground from Theft Deterent Module (TDM) to Start Enable Relay (SER). Otherwise, there is a ground present. My question is this. Should there be a ground from the TDM to the SER when the key is...
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1999 Chevrolet K2500 Suburban 7.4L Encoder Motor VIN: 1GNGK26J5X
Hello, I actually haven't worked on this truck for this particular problem myself. I am posting this question for my customer in the hopes that someone might be aware of a manufacturing or vendor problem which might explain why these encoder motors are failing...
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2000 Chevrolet Silverado 1500 4.3L readiness test issue VIN: 1GCEC14W4Y
This beater commercial ap truck came in with for DIAGNOSIS CODE STORED IN VEHICLE COMPUTER P0135 (02 SENSOR HEATER PERFORMANCE BANK #1 SENSOR #1). We then RECOMMENDED TO RENEW ALL OXYGEN SENSOR DUE TO TROUBLE CODE AND MILEAGE. We also found that the battery wa...
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1996 Oldsmobile Aurora 4.0L Mechanical VIN: 1G3GR62C9T
Customer dropped car off with a reported "clicking or arching" noise under hood. We could not duplicate noise first few times started and driven. Then it did act up. Loud knock noise in engine area, loudest in bottom of pan and by flywheel. Unbolted torque con...
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1997 Oldsmobile Aurora 4.0L drivers power window VIN: 1G3GR62C5V
This car came in with the drivers power window inop I checked to make sure it was getting power from the switch it was so I replaced the motor. It went about 2 months and had no problems then it came back with window inop I checked it again and same thing so I...
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1997 Oldsmobile Achieva S 3.1L No Start VIN: 1G3NL52M6V
Hello typical GM security no start light is flashing start and die. Checked power gnds. at lock cylinder and IPC found no problem ,no pattern to problem. Next step sent out dash to approved repair shop through our GM dealer. After sending in was told theft por... Trouble codes: P1629 (Theft Deterrant System Cranking Signal Malfunction)
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1998 Pontiac Firebird Firehawk 5.7L headlights VIN: 2G2FV22G8W
need help! headlights go up and back down once every time the unlock or lock button is pushed on the key foob, but not when using buttons in the car. the lights don't turn on but motors stay on for approx. 5 seconds after closed. is there any common problems. ...
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2003 Pontiac Grand Prix GT 3.8L engine fasteners VIN: 1G2WR52133
Hi group, Looks like I got myself in troble after I hopped up my GTP a bit. I'm now replacing pistons after breaking two(#1&4). Qusetion is, the rod bolts are torqued like a torque to yield type bolt. Can I reuse the rod bolts safely or not? By the way, they w...
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Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal LS 3.8L Surge, Cuts out, Stall, MIL Lamp on, abs & airbag lights VIN: 2G4WB52K4W
Replaced the ignition switch as many of you suggested and all is well. This one is fixed. Thanks for the confirmation on my original thought it is very helpful when you are making a guess and many agree. Thank you Mark
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1999 Cadillac Escalade 5.7L Radio VIN: 1GYEK13R5X
Thanks for all suggestions. Come to find out the ones who told me to leave the key on for one hour was correct. It appears the GM has a generic code that can be used. (forgot what that was) After leaving it on and then entering the code everything worked again...
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1988 Chevrolet Caprice 5.0L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G1BU51H8H
As it turns out this car has had the engine replaced 2 times. We did look into fuel issues as suggested by many of you and found that the carb was dirty (even though it had been replaced) We repaired the carb as needed but the problem still remained. We remove... Trouble codes: 43 (ESC volt low).
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1991 Chevrolet C1500 Cheyenne 5.7L Clutch fork VIN: 1GCDC14K9M
Thanks to all who replied. The fix was to just suck it up and remove the small metal retainer. It unscrewed with a little help,we put a pocket screwdriver behind the plastic washer and applied a little pressure. Turns out the part is available from the dealer,...
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2001 Chevrolet Cavalier 2.2L Shudder/Vibration VIN: 1G1JC524X1
Thanks everyone for your help. I did what many of you said to fo and applied the brake lightly when it shuddered and it went away. Flushed it with lube gaurd and so far so good. Thanks again for your help. Jon
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2001 Oldsmobile Aurora 3.5L fuel gauge VIN: 1G3GR64H11
Had 7 replies, these had a problem with check valves going bad letting exhaust into the air pump, that is what i found the front valve was bad replaced so far so good. also had replues to just replace the sender, iadvise customer off all the replies about the ...
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1988 Pontiac Grand Am 2.3L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G2NE14D2J
Problem has been diagnosed and repaired, thanks for all your help. Trouble codes: 42 (est spark timing circuit).
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1992 Pontiac Grand Prix SE 3.4L timing belt VIN: 1G2WJ14XXN
I want to thank the six guys who responded, but especially Jonatan [...] who responded within hours of my request. Everyone hit it on the head, the camshafts where not set 180 degrees apart. If the noise was not there, I'm pretty sure I would...
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1996 Pontiac Grand Am SE 2.4L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G2NE52TXT
It had a bad 1/4 coil and a bad injector on cylinder #4. After replacing the ign. coil it still had a slight miss on cylinder #4 only when cold I replaced that injector and the miss went away Thanks for all the help Trouble codes: P0300 (testing and results).
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1994 Saturn SL 1.9L Surge VIN: 1G8ZF5594R
I ordered a factory oem egr valve and that fixed the problem on this saturn .The one i had on the car was from a parts store .Thanks for all the replys
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