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Prev Professional Automotive Repair Technical Discussions for November 13, 2004
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet S10 4.3L 3-2 shift selenoid
Hi all, got a real head scratcher here, veh came in a few days ago with the complaint; after driving a few minutes veh takes off in second gear, trans was built at another shop for this problem, also ecm has been replaced 3 times with no effect on the problem...
2000 Chevrolet Silverado 1500 5.3L hvac VIN: 1GCEK19T6Y
Hi guys need help. The complaint is always hot no tempature control. initial check found it worked to cold once then it stop working stuck on hot. Followed the trouble three and ended needing to replace hvac controller. found the new controller wouldn't work a...
2003 Chevrolet Express 3500 6.0L instrument cluster VIN: 1GCHG39U43
Hi all. Customer says that when he is driving along the istrument cluster guages etc, all go out then they come back on sometimes one at a time. Ammeter may start to read then speedo starts to work then everything. He also says the radio goes off, sound and di...
1997 Pontiac Grand Am SE 2.4L ebcm? VIN: 1G2NE52T7V
Isn't always your best customers that wind up with the hardest problems? Customer called me at home last sunday morning, panicking because her abs light and brake light came on when she started her car. I told her to check her fluid and if it was braking ok, t...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet K1500 Cheyenne 5.7L engine noise VIN: 1GCEK19R5V
Thanks for all our help, Rich from Indiana, Dennis from Iowa, Greg from Ontario pointed me in the right direction with a TSB on piston skirts that are to short. #3 had 8 thou of piston clearance. probalbly the noisy one. I didn,t measure every one but you coul...
2000 Chevrolet Prizm 1.8L Poor Idle Quality, Stall VIN: 1Y1SK5288Y
Thanks for the info. My other shop has the vehicle at the moment but they said they scanned the vehicle and got a code for the IAC system. I think when I get it back I'll try cleaning the idle passages. I will get a chance to fix this vehicle eventually since ...
2002 GMC Envoy SLE 4.2L Starting VIN: 1GKDS13S72
I sent the truck to the dealer for security system programming.
1995 Pontiac Firebird Formula 5.7L Light Motor VIN: 2G2FV22PXS
My student has not brought their car back for me to look at again, we will disconect the alarm system first and try the head lights. I will post message later on the fix, thank you all for your help. Daniel
1999 Pontiac Bonneville SE 3.8L Hesitation, -20 FUEL TRIM VIN: 1G2HX52K5X
Hello Fellow Techs, I am closing this post for now, with a semi-fix. I received many replies about how to interpret the negative fuel trim values. I removed the throttle body and did a thorough cleaning of the throttle plates and throttle body itself. This d...
2001 Pontiac Montana 3.4L brakes VIN: 1GMDXBE61D
well the problem was that the pistons in the calipers were traveling in to you felt more pedal travel.thanks to all who gave suggestions. down the road she goes.
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