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Prev Professional Automotive Repair Technical Discussions for March 3, 2006
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Open Help Requests for GM
Help Request Answers
1990 Chevrolet Camaro RS 3.1L Excessive Emissions VIN: 1G1FP23T3L
Help... camaro is running rich. Replaced cat converter first thought it might be plugged up. Helped a little. checked the ohms on all injectors all tested ok except for 1 and 2 they ohmed out at around 9 ohms, replaced. Looked at other posts. Good spark blue o...
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1997 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEK13RXV
Vehicle is running rough, with rich plugs on the right bank. #4 cylinder is misfiring all the time. Compression is 170 on both #2 and #4, running compression is 60 at idle and 90 at 1500 RPM. There is good spark, replaced the cap and rotor with AC Delco just t...
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1999 Chevrolet Blazer 4.3L Monitors VIN: 1GNDT13W3X
Vehicle came in for inspection with Air pump codes, EVAP codes, and EGR codes. Typical blazer, Ran tests, too many to list, and replaced air pump (full of water) EGr valve( stuck shut) and vent valve (stuck). Cleared codes and now have driven over 500 miles pe...
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2000 Chevrolet Blazer LS 4.3L Fuel Level Guage VIN: 3GNDT13W5Y
Need a little help with getting a copy of a wiring diagram, seems fuel level guage reads full when not full. Guage will fluctuate like a loose conection. Would like to know if anyone can email or send a wiring diagram for the fuel level. I understand that when...
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2002 Chevrolet Express 3500 8.1L steering VIN: 1GCHG35G22
thank you in advance for your help!!!. vehicle came in 2 days ago with brakes pulling to left when applying brake. worse with heavier apply. parts listed have been replaced and system bled. we must be missing the boat on this one. we suspect problem in abs uni...
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1990 Oldsmobile Silhouette 3.1L Cuts out VIN: 1GHCU06D1L
hello techs.this car is cutting off intermittently. customer stated that car cut off when comes to stop starts right up but when puts in gear, it dies out. verified customer complaint.it cut off few times on me when i was driving on the dyno machine and was sl...
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1990 Oldsmobile 98 Regency 3.8L Mechanical VIN: 1G3CX54C2L
HAS A SCRAPPING/THUMPPING NOISE. IS MOST NOTICEABLE WHEN I PUT MY STETHESCOPE ON EXHAUST MID PIPE JUST ABOVE TRANS. ALSO WHEN I PUT IT ON THE EGR PIPE RIGHT NEXT TO THE EGR IT IS REALLY NOTICEABLE. WHEN I PUT IT ON LOWER INTAKE I CAN HEAR IT A LITTLE BIT BUT N...
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1995 Oldsmobile 98 Regency Elite 3.8L abs VIN: 1G3CX52K9S
When coming to a stop brakes come on hard at about 5 mph. At this speed can hear and feel abs activate. Scanner shows right rear wheel speed at 0 when other 3 are at about 5mph. I believe that the right rear sensor is the cause. Just want to be sure. It seems ...
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1996 Pontiac Sunfire SE 2.2L a/c compressor VIN: 1G2JB1246T
PCM will not grd a/c control relay. System will work if you manually grd relay control wire from PCM. No codes present. A/c request on scanner. Looking for info on PCM requirements to turn on a/c relay.
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2001 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E91
had ignition voltage on brown wire key on jumped brown and white wire key on no lite on test lite. unplugged harness at computer checked ohms from black white wire at harness and sensor plug at o2 have .3 ohms on 200 ohm scale my guess wire is good. TAKES LONG... Trouble codes: P0135
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1999 Saturn SL2 1.9L Exessive vibration VIN: 1G8ZK5274X
The customer brought this car to us with the complaint that it seems to vibrate at idle. After making sure there was no misfire we checked the motor mounts which all seem to be good, no cracks or distorted rubber. If you put your hand on the engine you can rea...
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Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L cruise control VIN: 2G4WS52J92
Thanks to Lee,James,Jason and John we have fixed the vehicle. With their recommendations on hand we went back to the vehicle with one more attempt. First I took James advice and verified that the high mount brake light and grounds was all in working order and ...
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1997 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y6V
After a lot of hours this car isnt fixed.Here are the things we tried and tested.Checked crank and cam signals.Replaced both crank sensors.Replaced fuel presure reg.Checked for antifreze getting in cylinders.Cleaned fuel injectors.Checked for voltage at inject...
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1997 Cadillac DeVille d'Elegance 4.6L Oil level VIN: 1G6KE54YXV
The consensus is that it is common for these engines to consume oil at what I would consider a high rate. A lot of responses mentioned a tsb for carbon buildup on the oil control rings. GM has an elaborate decarb process that seems to help. The coolant loss re...
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1998 Cadillac Catera 3.0L oil leak VIN: W06VR52R5W
Well I have found the problem and the parts are on the way to repair it. Someone had already installed new valve cover gaskets and had caught the electrical wires under the exhaust cam part of the valve cover and the valve cover was cracked and the wiring dama...
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2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R5Y
I would like to thank all the techs that replied you were all right with this problem. First off We did find a problem with the intake manifold vacuum leak, we found one the gaskets was actually cut, but it was sure hard to find it. Also it is nuts as to how m...
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1986 Chevrolet S10 2.5L Stall VIN: 1GCB514E5G
Thank you to those who replied a bad egr valve was the problem as several of you suggested I have never had an egr cause this type of problem before but I will remember it in the future.
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1994 Chevrolet S10 2.2L Poor Idle Quality, Surge VIN: 1GCCS1444R
The problem was as we suspected. It was the egr manifold gasket that mounts up behind the cyl head. The vacuum went from 16 inches to 21 inches. Blm went to 119 to 120 at once. The noise issue goes away when the engine warms up. Tsb suggests replacing piston a...
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1999 Chevrolet Silverado 1500 5.3L abs VIN: 1GCEK19T6X
I did not fix this vehicle but sent it to a gm dealer and they replaced the wheel sensors like some of the responses said and that fixed the problem .Thanks for everyones help.
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2002 Chevrolet Silverado 2500 HD 8.1L transfercase VIN: 1GCHK29G12
ya one little detail i wasnt told when the truck came back from detail is that they used a pressure washer on the in side of the truck so it shorted out the dic in the dash couldnt acsess it with the scanner so replaced it works good now and found a split in t...
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1998 Oldsmobile Bravada 4.3L airbag VIN: 1GHDT13W6W
sorry, i didn't update there is a wiring repair kit avilable from gm but it costs $4,000. the wire i repaired was not broken and i did not think $4,000 was good price i just used heatsrink and rerouted wires. i retested all wires for open or shorts no problems...
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1994 Pontiac Trans Sport 3.8L No Start VIN: 1GMDU06L9R
thanks to all who replied when i put all the information together it fell into place. Troy from Indiana hit it right on once the new balancer(the right one)was installed with another new crank sensor i still had a concern. checked signals coming into the icm a...
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1995 Pontiac Bonneville SE 3.8L Misfire, MIL Lamp on, hard cold start VIN: 1G2HX52K7S
Hey guys, thanks for all the helpful replies. Going on the ground ideas, basically stripped out the engine wiring harness. Found 4 wires to the Camshaft/Crankshaft sensors mashed together and shorting out intermittently. Someone obviously had worked in there...
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1996 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NE12TOT
I had many suggestions...I was told that engine grounds could be a factor, so I checked them all...I had suggestions that I should replace all igintion components to slove the problem, both coils,coil housing and module with delco parts. Due to expense, I pick...
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1997 Pontiac Trans Sport 3.4L No Start VIN: 1GMDX06E4V
I group well after i ha the ground clean at the trasaxle the problem never showed !! Thanks to all !! Dan
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2002 Pontiac Grand Am SE 3.4L tcc VIN: 1G2NF52E52
I went through this from one end to the other and couldn't really ever put my finger on anything substantial. As some of you said, I sent it back to the tranz shop to get some pressure readings. My buddy at the tranz shop dug thru his 'ATRA' technical Bulletin...
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