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Prev Professional Automotive Repair Technical Discussions for May 31, 2008
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Open Help Requests for GM
Help Request Answers
2001 Cadillac DeVille 4.6L Cooling Systems VIN: 1G6KD54Y51
Vehicle overheats and boils over and after several miles of driving boils out coolant , I replaced surge tank cap and still had overflow and overheat,I removed and tested t-stat in hot water opens at 190-195 F. , I filled with coolant and purge air out of syst...
1993 Chevrolet Corvette 5.7L system fault flashes every 15 seconds VIN: 1G1YY3PXP5
Vehicle came in shop with ABS and Brake light on. Repaired hydraulic leak. Brake light and ABS light went out. System fault light will not reset - flashes every 15 seconds. No information available in ShopKey or other sources. GM conputer cuts off at 95.
2002 GMC Savana 3500 5.7L Rear brake locking up, wheel speed sensors VIN: 1GDHG31R62
Rear brakes locking up, rear brakes have been checked and adusted multible times, no ABS codes stored. Brake system uses dynamic rear brake perssure control, useing abs module for perssure control, as well as a comination valve. Problem is most noticeable whe...
2002 Pontiac Grand Am SE 2.2L slave cylinder VIN: 1G2NE12F72
Replaced the master slave with OE parts. It comes in one assembly. I replaced it for leaking at the slave cly. and car came back two months latter, dealer warenteed the part and now it's back again one month for the slave leaking again. What is wrong with Me o...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Chevrolet S10 2.5L Hesitation, Surge, Cuts out, Stall VIN: 1GCBS14E75
Thank you to all who responded to my plea for help. Phillip from Illinois and Dave from Ontario were on the right track. We revisited all the vacuum lines and checked the TB base and EGR base gaskets with no apparent concerns. I decided to look again at scanne...
2000 Chevrolet Blazer LS 4.3L Hesitation, Cuts out, Stall VIN: 1GNCT18W0Y
Thanks to all that replied, its finnaly fixed! I found a bad ground from the battery to the frame. The eylet on the ground cable was corroded making a bad contact causing a 3.5 volt drop in the ground circut. I cleand the eylet and the where it contacts the...
2003 Chevrolet Silverado 3500 8.1L Starter relay VIN: 1GCJC33G63
thanks to all who helped. It was the igntion switch. The funny thing is is that I checked the purple wire pin 69 at pcm and it had ignition voltage when cranking and I also replaced the transmission range switch prior to trying the igntion switch. the igni...
1989 Oldsmobile Cutlass Ciera 2.8L Hesitation, Stall VIN: 2G3AJ51W6K
Thanks to all that replied. After chasing all your suggestions down, the following was found. Injectors all ohmed out normal.spray pattern and atomization appeared good with no drips or leaks. Fuel pump produced significantly more volume than was spec...
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