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Prev Professional Automotive Repair Technical Discussions for April 13, 2015
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Blazer 4.3L Bcm
Customers complaint, vehicle's battery will die overnight unless disconnected from vehicle. Battery tests fine, alternator fine, starter OK. .25A draw, remains steady after 15 minutes. Remove the TBC fuse, draw drops to .02A The TBC fuse supplies B+ to keyles...
2001 Chevrolet Silverado 2500 6.0L Abs VIN: 1GCGK29U01
Truck will not communicate with Dorman or used EBCM installed. All systems will not communicate and vehicle will not start at times. Unplugged EBCM and communication restored on other systems. Code U1300 serial data code now stored in PCM. Cleaned up ground un...
2004 Chevrolet Aveo 1.6L MIL Lamp on VIN: KL1TD52654
these 3 codes p0300 p0700 91781 keep coming back as soon as you get to 20 mph we did the valve bulliten 05-06-01-030d and all where replaced with new seals. runs fine also speedo only reads half of speed going installed new speed sensor and did not change than... Trouble codes: P0300, P0700, P1781
2011 Chevrolet HHR LS 2.2L MIL Lamp on VIN: 3GNBAAFW9B
my tech is posting this for better translation of info.vehicle failed ill state emission odb test for codes listed.found no description for b2aaa/b2a00 codes in mod or elsewhere.tested and repaired evap system(purge solenoid)faulty.tested vvt,replaced intake c... Trouble codes: P0442, P0455, P0496, P2138, P0010, B2AAA
1999 GMC C7500 Topkick C7H042 7.4L No Start VIN: 1GDJ7H1D6X
Hello all, this problem vehicle came in running but missing due to a damaged cam lobe and ruined roller lifter. Replaced cam and lifters and installed new timing chain and gears. everything went together as it should, but engine does not start. The starter cra...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet K2500 7.4L Timing VIN: 1GCGK24J5X
I Had Pcm Flashed & Still No Start Checked Spark Again Found No Spark Whent To Coil Sparking Great Removed Cap Found Mini Crack So Replaced And Was Fine Problem Was Solved Cause Was A Faulty Distributor Cap!!!
2007 Chevrolet Express 1500 LT 5.3L No Start, Stall VIN: 1GNFH15T37
With MAF sensor it will do the same thing and set a MAF code. Coolant tempture sensor rises steady and matches tempture gun. Fuel trims are within [...]. Bypassed fuel system wih injector cleaner. No change. Scanner shows injectors are workings. Was towed ...
2005 Pontiac Vibe 1.8L Axle VIN: 5Y2SM63885
Well after exhausting all possible options we decided to get a junkyard front differential, which also came with the axle stuck inside. we ended up leaving the coupler in the diff and putting the new axle joint / boot into that coupler
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