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Prev Professional Automotive Repair Technical Discussions for August 23, 2009
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Open Help Requests for GM
Help Request Answers
1993 Chevrolet K3500 Silverado 6.5L Harsh Upshift ( DTC 22) VIN: 1GCHK34F2P
Hello Everyone, I have a real problem child here. I recently took in a 1993 Chevy K3500 with a 4L80E with some transmission shifting issues. This truck was previously taken to a Transmission Shop to have transmission Rebuilt due to "NO OVERDIVE". I have Troubl...
2004 Chevrolet Monte Carlo LS 3.4L Misfire VIN: 2G1WW12E94
started having a hard start cranks won't fire then started bucking like a dead miss upon inspection found #2 cylinder had dead miss other cylinders show some history of misfire but #2 was more pronounced. checked spark at coil to wire ok, switched coils around... Trouble codes: 0300 (multiple missfire)

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac DeVille 4.5L No Start, Stall VIN: 1G6CD53321
Thanks to all your help. Even though the security light was not lit up the wire in to the ign. switch was broken, and was not reading the key. A new ign. switch and the customer was happy. Thanks Again
1995 Cadillac DeVille 4.9L a/c fan fan motor VIN: 1G6KD52BS4
well guys the caddy is waiting for me and will have to start from scratch,info recieved was good but did not pan out,middle wire no voltage as per test for fan allways ran,fan motor R&R twice,same problem.waiting for good used fan module[not sold at cad dealer...
1988 Chevrolet Corvette 5.7L Cuts out
After reading about how the electronic spark control system works in this vehicle I came up with my own test, 5 minute test. I disconnected the bypass circuit, [ [...] wire with a black stripe] or another way you can ground the ALDL 5 volt to ground, or you can...
1994 Chevrolet S10 Blazer 4.3L No Start VIN: 1JSBDLEH12
I want to thank everyone who replied. I used everyones info to help fix the vehicle. Giving me the wire colors really helped. The haynes manual was telling me that the relay was the one closest to the engine one the firewall. Which was wrong! It turned out to ...
1999 Pontiac Grand Am SE 3.4L alternator VIN: FKKLSDHAA1
Unfortunately I haven't fixed this car. I need to get a larger amp probe, as this alt is putting out more than 40 amps at all times. I did leave another 4 gauge wire from batt to alt so it doesn't cause a melt down. I'm sure it will be back to the shop with a ...
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