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Prev Professional Automotive Repair Technical Discussions for July 14, 2004
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Open Help Requests for GM
Help Request Answers
1991 Buick Century Custom 3.3L Poor Idle Quality, Stall VIN: 1G4AH54N1M
I apolgize for the length and if it seems scatter brain, but car has got the better of me today. Customer said after returning from a 3 day trip the car had to be jump started. Since then it stalls intermittently at stops. Usually after you have been setting ...
1994 Buick LeSabre Custom 3.8L battery light VIN: 1G4HP52L2R
Charging system and battery tested ok. Alternator was charging and but battery light in dash was still on. Replaced the alternator... no change in light. When the car is started light is out and stays out of 15 seconds. From what I have found out so far the re...
1997 Buick LeSabre Limited 3.8L tcc VIN: 1G4HR52K2V
This vehicle's RPM varies up and down 100-200 RPM when the TCC locks up and going up hill. The speed at which it happens can be anywhere between 35-60 mph. Throttle at which it accures is part to mid just so it stays in 4th with lock up. With the tech 2 I see ...
1977 Cadillac Eldorado 7.0L hose nipple VIN: 6L47S7Q209
Hi all, This car belongs to a 76 year old long time customer of mine (over 21 years). He drives this car to my shop once a week to fill the gas tank, and then takes it back home (3 blocks away). He wants to be buried in this car--It's his coffin. Now, the pro...
1990 Cadillac DeVille 4.5L MIL Lamp on VIN: 1G6CD5337L
customer brought this cadillac in because of a service engine soon light coming on. the customer did some work on the car before it was brought to me. he found out it has a code 49 for an air management system problem. the car would also backfire & it expanded... Trouble codes: E49 (air management system problem)
1993 Cadillac Seville STS 4.6L shifting VIN: 1G6KY529XP
This vehicle appears to start in 2nd (ecm comands 1st)will not shift at all does have reverse (ecm commands all shifts) 4T80E Transmission
1990 Chevrolet C1500 Cheyenne 5.0L Hesitation, Misfire, MIL Lamp on, Lack of power VIN: 2GCDC148H3
This vehicle will loose power under load and have a lean misfire, when this occurs a code 44 Lean exhaust will set, on a scanner the 02 voltage will stay around the .044 mv range, all other sensor inputs look normal, you would almost think that the fuel pump w... Trouble codes: 44 (Lean Exhaust)
1990 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54T4L
Well after reading all the posts I felt a little better about this one but still have not fixed it. We have a no start with no spark or fuel injectors, no ref to the ecm no rpm on scaner no codes,Have good crank sensor pattern on scope with .8 volts Have 12 vo...
1992 Chevrolet K1500 Cheyenne 5.7L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 1GCEK14K7N
hey techs. this chevy is driving me nuts. came in running terrible. timing was way off and found 2 vacuum leaks. truck then drove great on test drive. came in on hook next day. with the est connector unplugged, it runs great, timing is good. plug it in it won'... Trouble codes: 42 (est)
1997 Chevrolet Venture LS 3.4L Stall, MIL Lamp on VIN: 1GNDX03E2V
The customers complaint was that he was going down the highway with the cruise control on and went to pass a car, the van sped up but the speedometer stayed at 58 mph. He sped up without releasing the cruise and when he got around the car he hit the brakes and... Trouble codes: P0502, P0503
2000 Chevrolet Express 1500 5.7L Turn Signals VIN: 1GBFG15M6Y
[...] Would like to know if there are any on going concerns of turn signal switches going bad and shorting out, left turn signal only. Will blow fuse when left turn signal is put on, flasher buzzes then blows, hazards will blow fuse also. Short com...
2001 Chevrolet Tahoe 5.3L Evo VIN: 1GNEK13T91
Can not read the evo data or codes in this vehicle, although we can read the abs data from the bcm. Disconnected the remote start and no change. According to new car sticker truck came with variable assist steering, however it steers easy at any speed which wo...
1992 Geo Metro 1.0L seat belt VIN: 2C1MR2467N
Hi pro's, I'm looking for USED Driver's side indoor SEAT BELT, the new one is more $$$ than the car is worth...ANY links would be appreciated...thanks...this car is US model imported to Canada...
1996 GMC Sonoma SL 2.2L tensioner VIN: 1GCCS1445T
i have this truck that has a rattling noise from the tensioner. it is most pronounced when the ac is running. the noise is worse at idle and up to 2500 rpm. after that the rattling goes away. gm tech line said to recover the sys. and check for excess oil at th...
1998 GMC Safari SLE 4.3L dash VIN: 1GKDM19W4W
i have a dash problem. when you turn the key to the on position everyting on dash works, turn the key to crank and start the engine and release the key to run position and only the temp guage functions.i also have no leds on the radio,but radio works.radio l.e...
1997 Oldsmobile Silhouette 3.4L Vent Air Temp VIN: 1GHDX06EXV
Customer complaint, We just paid 600 dollars at the shop around the corner and we have the same problem, the air coming out of the passenger side vents is cooler than the drivers vent.They said they took the dash out and checked the blend doors and actuators a...
1996 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX52KXT
thanks in advance for all the help.
1997 Pontiac Grand Am SE 2.4L Hesitation, Cuts out VIN: 1G2NE12T9V
this vehicle came in with a bad miss at idle and when acceleration, mil light on, we scanned the ecm and found only a #1 misfire code, after talking to the customer we learned that it had never been tuned up since new. we replaced the coil covers(dist. cap), p...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Tahoe LS 5.7L Poor Idle Quality VIN: 1GNEK13R9T
Vehicle Returned 7/12.While Monitering 02s While Engine Idles Hot I Can Spray Chemical In One Small Area At Upper Plenum And Richen 02s And Smooth Idle.I Suspect a Small Hairline Crack In Upper Plenum In This Area.This Problem Is So Intermitent Customer Wants ...
2000 Chevrolet Impala 3.8L No Start, MIL Lamp on VIN: 2G1WF55KXY
Thanks for the advice on this one. The engine is siezed up. We disconnected everything, turned it over by hand, still tight. Also burned up another starter. Looks like an engine job. My mechanic says the thermostat may have been stuck because the driver decide... Trouble codes: P0135 (O2 Heater CRT Bank 1 Sensor 1), P0141 (O2 Heater CRT Bank 1 Sensor 2).
2001 Chevrolet Silverado 3500 6.6L No Start, Hesitation VIN: 1GCJK33131
Members,A big thank-you to Eric and Philip for the information. I apologize for my incompetance, but I did not have the proper tools to test the fuel system properly. But I did verify that the Fuel Rail Pressure Regulator was defective. I installed a new one a... Trouble codes: P0088 (Fuel Rail Pressure Control Problem), P0089 (Fuel Rail Pressure Not at Desired PSI).
2002 Chevrolet Tahoe LS 5.3L lights VIN: 1GNEK13Z92
Looks like the alternator is causing the problem. With alternator unpluged problem is gone. Trying to get dealership to warrenty. They say that this is normal.
2001 GMC Sierra 2500 HD SL 6.0L Driveshaft VIN: 1GTHK25U61
Thanks for all of the help. I lubed the snot out of the input splines on the trans, it worked for a few days, but the noise is back, and I need to get the truck back so I can do some further checks on it. I may have to try the updated yolk kit on this one. Tah...
1992 Pontiac Bonneville SE 3.8L compressor
Hi Group, I have to close this post, customer did not come for further investigation. I received 10 replies and I got some wonderful suggestions, I thank all of you who gave me some of their precious time, I really appreciate that. I will reopen this post if t...
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