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Prev Professional Automotive Repair Technical Discussions for April 15, 2005
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1996 Cadillac Seville SLS 4.6L clock VIN: 1G6KS52Y6T
The battery was disconnected during a repair (not dash related) and when the battery was re-connected the clock read 12:00, and we are not able to set it. We followed the procedure in the owner's manual (which is just pushing the H or M button) yet nothing hap...
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1996 Chevrolet Monte Carlo Z34 3.4L rotors VIN: 2G1WX12X1T
This vehicle came in with clicking noise. I test drove it and heard nothing at first, then once the brakes where heated up there was a clicking noise when the brakes were aplied. So I took the car back to the shop and found the rotors were slightly warped, the...
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1997 Chevrolet C1500 Cheyenne 5.7L Unknown VIN: 1GCEC19R5V
This truck came in with check engine light on, no other symptoms. It had P1870 stored in freeze frame but nowhere else. If I check dtc status it says dtc not supported. We posted on this truck 2 months ago for the same problem. Most replies said to replace the...
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1990 Geo Tracker 1.6L Stall VIN: 2CMBJ18UOL
Engine stalls. Noid light shows injector not pulsing when it stalls- just stays on. Ohms test 1.0 ohm on injector- ok according to specs. How can we tell if it is an injector sticking or a ECM problem. Identifix says there is no way to test it, but there has t...
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2001 GMC Cab & Chassis Sierra 3500 8.1L tcm/pcm VIN: 1GDJC34G51
Hi guys... This vehicle was brought to us after it came from a transmission shop. Vehicle had no reverse tranny shop replaced pressure switch but had no way of turning off MIL. Vehicle is shifting properly and we scanned both pcm and tcm for codes and no codes...
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1988 Oldsmobile Cutlass Ciera Brougham 3.8L No Start VIN: 1G3AM8133J
hello and thanks in advance to all who read this. after engine replacement this car sat for about two years then was pick up and driven 60 miles parked and has not restarted since. i work at a ford dealer and am not up to speed on gm. i checked for fuel and s...
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1993 Oldsmobile Cutlass Supreme 3.4L Timing Belt VIN: 1G3WT31X5P
This vehicle came in with a shreaded timing belt. Lined up cams with proper aligning tools, replaced both idler pulleys & tensioner pulley, also replaced automatic timing belt tensioner. Engine runs great but timing belt is super tight & very noisy(because it ...
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1995 Oldsmobile Cutlass Ciera 3.1L No Start VIN: 1G3AJ55M2S
vehicle has no start condition with no spark, no rpm signal through snap-on scan tool and no pulse at injectors. tap test does light the noid light and also shows rpm on the scan tool. reluctor ring has no cracks upon inspection. we have been on this car for o...
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1994 Pontiac Grand Am SE 3.1L Limp In Mode VIN: 1G2NE55MXR
ok all you GM trans techs, 94 pontiac grand am 3.1ltr 4spd auto, history codes 28,78 ran diag and both gear selector switch and output speed sensor seem to be working properly. Vehicle is stuck in limp in mode, in drive it is in 3rd gear, won't shift up or do...
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2000 Saturn LS2 3.0L MIL Lamp on VIN: 1G8JW52R7Y
car came in with 2 codes and customer telling us the loss of power light comes on at times and sometimes runs rough found bulletin and did said repair and after 2 weks car is back with same codes Trouble codes: P0221 (p1523-), P1523
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Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Regal GNX 3.8L bumper fillers VIN: 1G4GJ117XH
I havent had time to look these up but I am forwarding the help I recieved. Will update later. Thanky, Thanky, Thanky, Paul. Try . They have seemed to help me alot with hard to find bumper fillers. try old buick parts.com th...
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1992 Buick Century Limited 3.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 3G4AL54N6N
Thanks to all that replied. Its been a while since I worked on these 'older beauties'. Once I installed a new ECM, problem was gone. Thanks again. Nikolas [...] Trouble codes: 14 (Coolant Temp), 43 (ESC Sensor).
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1989 Cadillac DeVille 4.5L Poor Idle Quality VIN: 1G6CD5156K
Hey guys this car is fixed it has been a few weeks and I talked to the lady today and everything is great. Thanks to all the guys who responed. The fix was to do a relearn, I disconn. the battery for 30 min. hit the brake, then reconn. the battery. I stated th...
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1992 Cadillac Eldorado 4.9L Excessive Emissions VIN: 1G6EL13B2N
thanks for the very quick replies, some stated about possible faulty fuel injectors, carbon build up on combustion cylinders. the problem was a clogged egr passage. there is 2 passages, open throttle and look down and you will see 2 tubes. the right side tube ...
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1994 Cadillac DeVille 4.9L Poor Idle Quality, Surge, Stall VIN: 1G6KD52B8R
Thanks to all who replied. Eric, Marcus,Jack,Robert,Kenneth, Dan,Eric,and Pete [...] sugguested check the grounds,which I did and re did, didn't change,sorry Eric #1 I couldn't get access to a 5gas analizer but it is a great idea. Marcus sugguested the distri... Trouble codes: 52 (long term memory reset).
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1988 Chevrolet C1500 Cheyenne 5.7L Engine VIN: 1GCFK24KOJ
THANK YOU to ALL that replied. I got the head off. Nothing visible. Gave customer option of magnafluxing head. He decided to get a new engine, when he has the money. Thanks again to you all for Excellent input.
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1992 Chevrolet G20 Chevy Van 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GEBG25K2M
The oxygen sensor that the customer had replaced was the wrong sensor - also found 2 carboned up plugs - #7/#8 - replace all plugs - replaced the oxygen sensor with the correct one and retested emissions and is now passing good and idling much smoother - HOWEV...
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1994 Chevrolet K1500 Suburban Silverado 5.7L ABS light on VIN: 1GNFK16K3R
Customer did not return with vehicle. Replies suggested checking wiring connections at the unit on the frame and if thats ok it probably needs a valve assembly due to outside element intrusion. If customer returns I will update this post. Thanks for your time.
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1996 Chevrolet K2500 Cheyenne 5.7L No Start VIN: 1GCGK24R1T
Thanks for all the replies. I had two failures on this vehicle. The computer was supplying a very fast (so quick the DVOM barely had time to change digits) 12V to the relay windings, but the relay was bad and so was the pump. Turning on the ignition and walkin...
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1996 Chevrolet S10 2.2L compresser VIN: 1GCC8144XT
Well the customer has returned and I tried a used computer that they supplied. Had the same issue with the everything being right but the computer still would not ground the a/c relay. At this point they have not returned. I did verify the wire from the relay ...
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2001 Chevrolet Cavalier 2.2L Daytime running lamps VIN: 1G1JC12411
Thank you everybody for all the replies. Many replies focused around the wiring in the fr. valance and left frame rail area behind the headlamp. Unfortunately in this case, what we found was more related to the previous collision repair that was noted in the o...
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1994 Pontiac Sunbird LE 2.0L Poor Idle Quality VIN: 1G2JB14H5R
hi group...i tried propane enrichment again on this car...it seemed to run a little better,pointing to a fuel delivery problem i popped out all four injectors and found all four completly full of crud...I am surprised that this thing ran at all...picked up som...
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