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Prev Professional Automotive Repair Technical Discussions for November 21, 2012
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Help Request Answers
1997 Chevrolet Monte Carlo LS 3.1L ignition VIN: 2G1WW12M4V
This car stopped here and would not start again. Sometimes it would start and run for about 30 seconds then die. The scanner shows no RPM when cranking except somtimes when it would start. Now it shows the 24X crank sensor as 163480. Both crank sensors are new...
1999 Chevrolet Venture 3.4L Driven Wheels VIN: 1GNDX03E2X
Customer described that the low traction light comes on when making a hard turn that pins the steering wheel. Verified complaint; noticed that the low traction light comes on more for hard left hand turns than right hand turns. No codes for abs/traction contro...
2002 Chevrolet Trailblazer LS 4.2L communication
Ok i need help from my fellow techs. I have a 02 trailblazer ls that is turning out to be a real pain. Came in last week on the hook no start no crank. I diagnosed the problem to be a bad ignition switch. Vehicle started and customer picked it up. Today the ve...
2004 Chevrolet Tahoe LS 5.3L 4wd VIN: 1GNEK13Z84
This is driving me nuts. The customer says the truck shifts itself into 4 low on its own, and he can't shift it out until the truck is shut off and restarted. We have replaced pretty much everything. We also cleaned the ground by the frame under the driver doo...
2004 Chevrolet Trailblazer EXT LS 4.2L Fuel Tank VIN: 1GNES16S94
When trying to put gas in the fuel tank it will take maybe 1/2 gal. Then stop as though the tank is full. The fuel gauge seems to be accurate as far as we can tell. We have replaced the evap valve on top of the tank but that didn't help. Any suggestions?
2005 Chevrolet Aveo LS 1.6L Poor Idle Quality, Surge, Misfire VIN: KL1TD52675
Mil lamp inoperative, random misfire code, cannot get data from ECU but can pull codes. ECU defective???
2006 Chevrolet Tahoe Z71 5.3L Fuel Gauge Fuel Sender VIN: 1GNEK13Z66
Hello im stuck on this one. I installed a oem sending unit today and found the fuel guage wasnt working after reassembling. I dropped the tank down and tested the sending unit and found the level sensor was not changing the voltage when i move the arm. So i re...
2007 Chevrolet Impala LS 3.5L tcc VIN: 2G1WB58KX7
I need a gm trany techs help here. vehicle has no codes or other problems. as cruise speeds the tcc slip speed goes from 0 to 65-105 rpms. tcc duty goes up to compinsate bringing it back down to 0. This happens at regular intervals of about every second. I hav...
2009 Chevrolet Suburban 1500 LT 5.3L park assist VIN: 1GNFK26319
I found a procedure for Disabling Rear Park Assist. This is for trucks. It would not work for me. On 2007-2011 Silverado and Sierra models, owners or aftermarket upfitters that remove the rear bumper, install a different rear bumper, add a different box/flat ...

Fixes & Summaries for GM
Fix/Summary Answers
2008 Buick LaCrosse CXL 3.8L steering VIN: 2G4WD58218
I will close this for now as customer was in a wreck with car. Seems like the consensus is a bad pump. I was going to flush the system first then install a pum is the noise was still there. Have to wait and see what happens now.
2004 Chevrolet Silverado 1500 LS 5.3L cruise control VIN: 2GCEK13T14
thanks for all the help. It turned out to be 4 broken wires on the brake light switch, odd thing is that all the brake lights worked fine. installed a new harness and cruise works. No abs codes but it did show brake switch "on" so i checked the switch and foun...
2008 Chevrolet Impala LS 3.5L MIL Lamp on VIN: 2G1WB55KX8
Well guys, I took a shot at replacing the canister and reset all fuel trim data and reset fuel composition. Its been about 3 weeks now and customer said the CEL has not come on yet. Thanks for the replys. Trouble codes: P1174.
2008 GMC Acadia SLE 3.6L Wipers VIN: 1GKEV13788
@#$%@#&%$#*&^%$... .. REMANNED PART.. The issue was as per my original diagnoses the fault was the wiper motor after 2 remanned units went with new OEM and problem solved. thanks to all who replied
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