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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 21, 2015
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet K1500 Silverado 5.7L 1-2 2-3 OD Shift VIN: 1GBEC19R6W
hey Guys I have a 98 Silverado 4x4 auto trans very clean low miles its developed a very quick shift pattern it will shift from 1st up to overdrive within 25 to 30 MPH under light throttle but once its hot it will shift normal. fluid is clean smells good. if yo...
1999 Chevrolet Metro LSi 1.3L Misfire VIN: 2C1MR5227X
car from another shop.car was running fine and they did a maintenance timing belt.now car runs on 2 cylinders.2 and 3.this engine has 2 coils and 2 plug wires.while engine running there is no spark out of coil to cylinder 1 and 4.just cranking engine over coil... Trouble codes: P0113
2001 Chevrolet Impala 3.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 2G1WF55E61
Hello all, this is my first post and look forward to the insight and knowledge from everyone. Vehicle was passed down to me after other tech gave up. Multiple things were replaced for various reasons , most of which I do not know. I have gathered as much info ... Trouble codes: P0300
2004 Chevrolet Trailblazer EXT LT 4.2L transfer case VIN: 1GNET16574
Scanner shows front axle engaged Transfer dase module shows in auto mode shift to low works fine shift to 4 hi encoder shifts back and forth and goes back to auto mode switch on dash show in 4 hi but auto on scanner guessing bad tcm any thoughts Thanks
2006 Chevrolet Cobalt LT 2.2L MIL Lamp on, lack of power VIN: 1G1AL15F16
Car came in with SES light on, and Power Loss message. Had code P2138 Accelerator pedal position sensor 1-2 correlation. Car would not accelerate over 25mph. We replaced the Throttle Postion Sensor/Pedal assembly. Now customer has same problem, but not every d... Trouble codes: P2138 (Accelerator pedal position sensor 1-2 correlation)
2003 GMC Yukon XL 1500 SLE 5.3L compressor not on VIN: 3GKEC16Z73
When vehicle came in to my shop ,compressor was not coming on . I replaced the automatic air control box on dash and the compressor came on. I notice high low side and replaced drier and orfice and low pressure switch .Pressures were fine . then when a/c fan w...
2008 Pontiac Grand Prix 3.8L Misfire VIN: 2G2WP55288
I have a misfire on cylinder #6 at idle, goes away with RPM increase. Have tried new fuel injector, car has new plugs and wires on it and have swapped #6 with a different cylinder and no change. Replace lower intake gaskets, checked for vacuum leaks, none foun... Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet Lumina 3.1L fuel tank VIN: 2G1WL52M1V
replaced fuel tank pressure sensor, now it is reading correctly.. vehicle has been gone for 2 weeks all good so far. Trouble codes: 440 (evap system malf).
2008 Chevrolet Malibu LT 2.4L No Start, Hesitation, MIL Lamp on, sluggish VIN: 1G1ZH57B08
sorry for taking so long to post,still have vehicle put over 60 miles with no issues!!! Most people were thinking ground problems. We scoped the grd signals while driving(dual scope)at common grds under console,rechecked all connections,but again for this typ... Trouble codes: U7300, C0000, B1000.
2010 Chevrolet Cobalt 2.2L heater controls VIN: 1G2AD5F54A
thanks to all who replied. The problem was with the bcm, it wasn't seeing a repose when the ac was being requested, we installed a new bcm and programmed it and all worked great,
2012 Chevrolet Equinox LT 2.4L No Start VIN: 2GNALDEK0C
So I found a green wire broken...perhaps a low speed LAN...after that I had all of the authorizations and even had a starter relay "ON" PID...unfortunately it still wouldn't crank with the key. Powered the wire from the ECM to the starter relay and it cranked... Trouble codes: P0615 (Starter relay control circuit).
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