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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 2, 2010
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Open Help Requests for GM
Help Request Answers
1998 Buick Century Custom 3.1L dies VIN: 2G4WY52M7W
I have a real strange one here, customer says after driving 150 miles car will die if it restarts it will go 1-2 miles and die again,It is not throwing any codes I do not know if it's loosing spark or fuel. The next day it will go 150 miles and die again. I do...
1991 Cadillac DeVille 4.9L Compressor Relief Valve VIN: 1G6CD53B6M
Hello, This deville came in with a contaminated system and bad compressor. I replaced the compressor, condensor, Rec/dryer and the updated filter/orfice. I manually flushed the evaperator and lines. I also replaced both temp sensors and the low pressure switch...
1999 Chevrolet Cavalier Z24 2.4L Poor Idle Quality, MIL Lamp on VIN: 4G1JF32T1X
I have a problem child 1999 Cavalier with 2.4L quad 4 motor. Have had poor running for about 1 year now and Secondary Ignition, and 1 new AC Delco injector installed in #3 cylinder at that time with engine running better but I did not like LT fuel of 22-25% an... Trouble codes: P0171 (Fuel Trim Lean)
2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNCT18W51
Not sure what to do here - we never experienced a pressure too high reading. Problem with these vehicles is it takes a lot of driving to find out you didn't fix it. This one is a 4wd "T' series, but the Mitchell 1 repair system we use only refers to L&M series... Trouble codes: P0440 (Evap System Pressure Too High)
2002 Chevrolet Trailblazer LTZ 4.2L Stall VIN: 1GNDT13S62
This vehicle came to the shop with a dead battery. We replace it with an new one and now the vehicle stalls when starting and at some stops. Customer says it started this only after the battery was installed. I have no other history on the vehicle. No codes in...
2003 Chevrolet Silverado 2500 HD 6.6L hard start VIN: 1GCHK29183
Good morning, Im posting this because i'm not a deisel tech but want to help a new customer out. This truck cranks for about 30 sec's before starting when cold and when warm its even worse. Sometime it takes a minute or more. The only trouble code is for alter...
2006 Chevrolet Impala LS 3.5L MIL Lamp on VIN: 2G1WB58KX6
Ok guys, i have this flex-fuel impala, i have verified that the car is e-85 compatiable and i also sell e-85, and i sell a fair amount of e-85 to customers who are putting it in all kinds of flex-fuel vechiles, this is the only one that i have a complaint abou... Trouble codes: P0171 (System to lean bank 1)
1993 Pontiac Grand Prix GTP 3.4L No Start, Cuts out, Misfire VIN: 1G2WP14X3P
Please help me here!! I have this car that has been to 2 other shops already, and now it is in my lap. The customer has NO MONEY, and wants the car to be perfect. He bought the car about a month ago, it ran great, he drove it for a couple weeks, then one day w... Trouble codes: 42 (EST Circuit)
1999 Pontiac Sunfire SE 2.2L Starting VIN: 1G2JB1247X
Car came in on tow truck no start. When it got to shop started right up. Plugged scanner up got one code po342. Replaced crank sensor, road tested everything good. While takeing car to owner check engine light came on. Plugged in scanner got another po342 code...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Chevrolet Monte Carlo SS 5.0L No Power VIN: 1G1GZ11G5H
Thank you all for your help I was able to finally convince the customer that the engine needs to be upgraded for the A/T to work. He will be looking for an engine. THANK YOU again
1992 Chevrolet Lumina 3.1L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 2G1WN54TXN
Ok, this one is back on the road. Soom good thoughts about where to go. Oygen sensor no, because is was affected in OPEN LOOP, so o2 woudln't have fuel control at that point. Ohmed injectors 3 different times at different temps. All within a 10th of of spec. C...
2006 Chevrolet Express 3500 6.0L No Start VIN: 1GBHG31U46
Customer diagnosed the problem as a bad E.C.M. and had the vehicle towed to the dealership for replacement and flashing. Thanks to everyone for your help with this problem.
2003 GMC Sierra 1500 Denali 6.0L Air temp. Door or actuator VIN: 2GTFK69U03
Well, turns out that my A/C scale has had the gas, Pressures were right as i stated, but my scale was going bat shit crazy, (i dont have a full self contained unit, just a scale, bottle heater and shutoff valve from master cool) I recharged it again to double ...
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