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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 12, 2015
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Open Help Requests for GM
Help Request Answers
2006 Chevrolet Impala LS 3.5L Misfire VIN: 2G1WB58K46
A test drive confirmed an intermittent random misfire (no codes). As the car traveled uphill in high gear loading the engine (misfire only occurs on the climb- and before the normal downshift occurs. The misfire will stop as pedal is depressed and TQ unlocks a...
2006 Chevrolet Monte Carlo LT 3.9L Surge, Stall VIN: 2G1WK15156
first off thanks for takeing the time. This monte carlo we got from a auction with this surge. we have swapped out many parts and even took it to the dealer and they couldn't find anything. just sold us a BPP sensor. I have scaned it has no codes in her. every...
2007 Chevrolet Silverado 1500 LTZ 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19087
Truck came in yesterday with 3 history codes: P0300 Random missfire, P0521 Engine oil pressure performance and P0573 brake switch circuit high. Check engine light was off. We checked oil pressure and replaced the sensor and replaced the brake light switch. Mon... Trouble codes: P0300 (Random Missfire)
2003 GMC Sierra 2500 SLE 6.0L Cuts out VIN: 1GTHK29U73
when we accelerate slowly the truck runs fine but when we accelerate at fast rate the truck back fires... we checked map sensor, o2 sensors, mass flow sensor, checked coils, check spark all is good. Took cats of exhaust and problem still occurred. what could b...
2005 GMC Sierra 2500 HD SLE 6.0L 2ND Gear Starts VIN: 1GTHK29U45
This truck came in with no reverse. The Direct clutches were smoked and the cooler was plugged solid. I replaced the cooler, flushed the lines, and did a complete overhaul including all new solenoids, pwm, mlps, speed sensors, shift kit, bands, clutches, and s...
2007 GMC Yukon XL 1500 Denali 6.2L wipers&washers VIN: 1GKFK66847
Gentleman, Any help would be greatly appreciated. I have a 2007 Yukon Denali 1500XL that has a Wiper/Washer problem. While driving on a dry day the wipers will come on with the washers and you can not shut them off. The washer pump will continue to run with th...
2011 GMC Terrain SLT 3.0L shake at idle VIN: 2CTFLXE50B
thanks in advance. I have a 2011 gmc terrain that has a bad shake at idle. customer thinks its misfiring, when i scan the pcm its not picking up a miss and there are no trouble codes. i dont think its a misfire problem either. seem more like the engine is out ...
2007 Hummer H3 3.7L Starting VIN: 5GTDN13E17
Vehicle will cold start every time however, if driver parks vehicle after warm-up drive and returns in less then 10 minutes time vehicle will not start. Driver then kills 10 minutes time,.attempts restart and is successfull. Suspect PASS-LOCK issue as patterm ...
1991 Pontiac Firebird 3.1L No Start VIN: 1G2FS23T4M
Thanks in advance for this, I can't believe one this old is kicking my butt. Car was towed in for a no start. Customer stated that it started skipping and running real bad prior to dying on the road. Tested spark, good at plugs and coil. Tested fuel pressure 4...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5415Y
Thanks for everyone who replied with something other than what I had posted that was already checked, this vehicle is fixed, during one of the test drives I found that the PCM commanded the supercharger boost control solenoid to 0% (closed) during EGR flow on ... Trouble codes: P0401 (Insuffecient EGR flow).
1982 Chevrolet Monte Carlo 3.8L Hesitation, Cuts out, Misfire VIN: 1G1AZ377XD
Thanks for all the great responses. After taking both valve covers off I found there were several valves that were either too tight or too loose. I readjusted the valves and then reset the timing and tuned the new carb. Car runs great now Thanks for all the gr...
2009 Chevrolet Colorado WT 2.9L ABS and skid control light is on VIN: 1GCCS19939
checked wiring between yaw sensor and ebcm. Wiring was good. Replaced ebcm and programmed and problem was fixed. Thanks for your response.
2010 Chevrolet Suburban 1500 LT 5.3L abs VIN: 1GNUKJE30A
rechecked all the wiring and all looked good, i still believe that it is the controller but customer would not let me buy a new correct one. gave the truck back to customer and waiting to see if they call back. if i find any new info i will add it here.
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