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Prev Professional Automotive Repair Technical Discussions for February 1, 2013
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Open Help Requests for GM
Help Request Answers
1997 Cadillac DeVille 4.6L lifter VIN: 1G6KD54Y0V
We just did a lower oil pan gasket on this car and it came back with a lifter noise after it sits for 15 minutes or on cold starts. also gets an oil light coming on at idle when first started.
1993 Chevrolet K3500 Silverado 6.5L glow plug light VIN: 1GCHK34FXP
This truck has done this for quite a while. Driving down the road the glow plug light & battery light flash togather? When you start the vehicle the glow plug light cycles normally when starting. The Alternator charges normally. We did notice when your driving...
1998 Chevrolet K2500 Cheyenne 7.4L torque converter VIN: 1GCGK24JSW
This truck was brought to me with a complaint of no overdrive. Overdrive works fine but the converter never locks up. The computer never commands it. It has all the info required--engine temp, vss,tps,brake switch etc. There are no engine codes. If I program m...
1996 GMC K2500 Sierra SL 6.5L No Start VIN: 1GTGK24F6T
hello fellow techs of iatn!i'm looking for some advise for this truck since is my first time working on gm diesel engine witch i'm not familiar at all(had fixed lots of powerstrokes).truck was towed to my shop for no start so first thing I did was to scan it a... Trouble codes: P1218
2006 Hummer H3 3.5L MIL Lamp on VIN: 5GTDN13636
truck runs good,no apperant vaccum leaks,throttle body has been cleaned.If the MAF sensor is unpluged fuel trims come back into line.but known good part did not help! Trouble codes: P0171

Fixes & Summaries for GM
Fix/Summary Answers
2001 Chevrolet Astro LS 4.3L Starting VIN: 1GNEL19W51
after several hours of checking wires and sensors we found a poor connection at the pcm for the ignition and fuel system. we tightened up the pins in the pcm connector and vehicle started. test drove vehicle and it seem to be ok now
2004 Chevrolet Silverado 1500 LS 5.3L MIL Lamp on VIN: 2GCEK13T94
Thanks for all the replies, I think this this is in bag took the truck back for more repairs requesting to see the parts that got changed. They aparentlly did not do all they said they would do to fix the truck the first two times it was in their shop. This ti... Trouble codes: P0327.
2005 Chevrolet Cobalt 2.2L water pump VIN: 1G1AK52F55
Thanks to everyone who replied. By the demand of the boss, I replace the water pump. But upon removal I had a hard time removing the pump off the sprocket. I had an even more difficult time installing the new pump. Long story short, as several of you mentioned...
2006 Chevrolet Silverado 2500 HD LT 6.6L glow plug VIN: 1GCHK23D36
Controller was the issue thank you very much. I do not know why it picks on the number 6 glow plug but it has not come on since.
2007 Chevrolet Tahoe LTZ 5.3L Misfire, Poor Fuel Economy, MIL Lamp on, Limp Mode VIN: 1GNFC13017
Thank you everyone!! Specifically, Justin from Ohio. We found the wires chafing on the metal AC lines (to Accumulator), right rear of engine compartment, near trans dipstick. It was a full harness but the pink wire (possibly with black stripe) was the only one... Trouble codes: P0202 (Cylinder 2 Injector Circuit Fault), P0204 (Cylinder 4 Injector Circuit Fault), P0206 (Cylinder 6 Injector Circuit Fault), P0208 (Cylinder 8 Injector Circuit Fault), P0300 (Random Cylinder Misfire).
2007 Chevrolet Impala LTZ 3.9L High idle VIN: 2G1WU58R77
We did not fix this car. Thank you for all the usefull information. We were hesitant to diagnose a faulty pcm and the customer needed the car, of course. He brought it to the dealer instead of back to us. Guess what! the dealer told him they weren't sure what ... Trouble codes: P0121 (p2119-), P2119.
2009 Chevrolet Cobalt LT 2.2L Misfire, MIL Lamp on VIN: 1G1AT58H39
We thought the injector was washing out the cylinder with fuel, thats why we thought we had an injector problem. Customer decided to take it to the dealer since it had low miles on the engine. Thanks for all the replies. Trouble codes: P0301.
2011 Chevrolet Colorado LT 3.7L Key FOB VIN: 1GCHTCFE1B
I am so grateful for the quick, accurate, and precise response from IATN techs! What a good way to help each other, and to promote good relations between auto technicians. Several answers were exactly on the money. You go to Body control module, then Module...
2004 Pontiac Grand Prix GT1 3.8L plastic elbos VIN: 2G2WP52204
OK Guys metal elbos was and is the way to go, will see how that holds and will use them from now on. I did also replace radiator cap.Most all suggested metal ones thanks alot.
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