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Prev Professional Automotive Repair Technical Discussions for January 27, 2007
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Open Help Requests for GM
Help Request Answers
2000 Chevrolet Blazer LS 4.3L heater VIN: 1GNCS13W61
have a low heat situation. vehicle in for low heat. filled coolant system, replace pressure cap. engine temp shows 190-200. Using infared scanner, shows 135-150/90/110 degrees at heater core inlet/outlet at firewall. with blower on low speed there is some warm...
2002 Chevrolet Express 2500 LS 5.7L abs module, ebcm VIN: 1GAGG29R12
van has 6 different codes w/genysis scanner, 3 codes only w/ modis, 1 code only w/ solus. all codes relate to ebcm failure. has good power going in, all fuses good, all grounds tested ok even added extra ground to ebcm. you can clear codes but will come back w...
2001 Oldsmobile Bravada 4.3L engine VIN: 1GHDT13W61
Hey all, cold start engine sounds just fine, but as it warms up, slight ticking to all out knock occurs as it heats up. Still sounds like it's coming from front of engine near timing cover. I beleive someone has had this before. Maybe balance shaft problem? Dr...
1983 Other GM semi truck 700CID Shift Valve
Hello, I have a question for anyone that is fairly familliar with Allison transmissions. We have an 83 "white" brand truck with an allison mt654 ser# 105741T that it did not originally come with {had a standard tranny}. The original complaint was that you coul...
1999 Saturn SC2 1.9L no reverse VIN: 1G8ZY1276X
Hello everyone, Iím hoping someone can help me with this problem. We got this Saturn in with no reverse and very hard 1-2 shift with a code P0732. After contacting Saturn we discovered that the wrong transmission was installed in the car. We have a 2100-3342. ...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Hesitation, Surge, Stall, Misfire VIN: 1GCDC14K6K
Dancing all round the fuel injector were bad but they scope very good and the low voltage ramping did not help in this case we took a chance and overhauled the TBI w/ new injectors well just a gut felling. Thanks to all and to all have great weekend. Trouble codes: 45 (Rich Exhaust), 44 (Lean Exhaust).
1992 Chevrolet C3500 Cheyenne 7.4L Stuck in 2nd gear VIN: 1GCHC33N8N
I said that I replaced the trans connector that came with the trans, I also replaced the input and output speed sensor connectors, repaired bad wiring around intake. Yesterday we found the truck had no knock sensor and the wiring was melted to the exhaust mani...
1996 Chevrolet Monte Carlo LS 3.1L High Idle VIN: 2G1WW12M3T
Thanks to all who replied, sorry it took so long to post this--had to wait for customer to get through saying 'HOW MUCH??'. Then he finally calmed do and agreed to let us do the repair, I am happy to report that a nice shiney new PCM did the trick, and cleared...
2001 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GCEC14W91
thanks for all the replys, lots of helpful hint like cam retard, dist. cap. i decided to replaced the dist. and found the dist. was defective. the truck know runs great. once agin would like to thank everyone who resopned. also thank iATN for the great work th... Trouble codes: P0300.
2001 Oldsmobile Alero GL 3.4L service engine soon light, anti lock light, and tr VIN: 1G3NL52EO1
Hi guys, just want to thank everyone for their time. James and Steve were right I let my eyes play tricks on me, and I confused the service vehicle light for the service engine light, duh, causing wasted time for a different concern. Customer states he never n...
1999 Saturn SL1 1.9L Surge, CODE P0401A VIN: 1G8ZH528XX
Hi...First, for those did not remark, since we can update a post only once, I replied to myself, so read more then the open/update/fix if you want complete repair progress information... I waited a couple weeks before closing to make sure the problem was fix... Trouble codes: P0401 (EGR insufficient flow).
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