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Prev Professional Automotive Repair Technical Discussions for May 18, 2013
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Open Help Requests for GM
Help Request Answers
2000 Chevrolet S10 4.3L No Start VIN: 1GCDT19W9Y
customer complaines that truck will not start intermittently and security light will come on while driving. will eventually start.every time i get there it will start right up.i noticed after no start code b2960 will be set.checked freeze frame data,passlock v... Trouble codes: B2960
2002 Chevrolet Silverado 3500 6.6L Excessive Emissions VIN: 1GCJK33102
Hi Guys Got A duramax that is smoking at idle I have ran the FUEL INJECTOR BALANCE TEST and got 4.1 mm at idle out of gear on number 1 and 6 i did a injector cut out and all changed rpm and it smoked still were do i go from here
2006 Chevrolet Trailblazer LT 4.2L Coolant Loss VIN: 1GNDT13S06
Have a customer complaining of coolant loss, says he has to keep adding coolant. I have pressure tested this truck 2 times both times it's held 15 psi for more than 2 hours. No drips or leakage anywhere. Wondering if these 4.2's have headgasket issues, doesn't...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac DeVille Concours 4.6L high idle VIN: 1G6KF5295V
it was a bad PCM .. the main point was with the TPS unplugged you should have seem a stable voltage...installed used pcm and everything is fine now.
2004 Chevrolet Corvette 5.7L Electronic VIN: 1G1YY22G14
This corvette transmission is located in front of rear differential housing join together and torque convertor is also at the back. Drive shaft is between engine and torque convertor. Oil drain plug is on the lower left corner of the tranny oil pan. There is n...
2005 GMC Canyon Z85 SLE 3.5L Hesitation, Surge, Loss of Power VIN: 1GTDS13675
I was hoping customer would bring the truck back to do more tests, but hasn't so I will have to close this without a fix. The evening before he took the truck I reinstalled the old BCM. When I drove it I thought the symptoms remained the same, but the custome...
2005 Pontiac Grand Prix 3.8L air system VIN: 2G2WP52215
cradk in housing above air pump motor. replaced pump asy. with new top.
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