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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 12, 2013
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Open Help Requests for GM
Help Request Answers
1978 Chevrolet K10 Cheyenne 5.7L Cuts out, Stall VIN: CCZ1481165
Ok I've checked wiring in the dizzy, the pickup is good, the overall wiring looks like its not shorting out, but what I can't figure out is why the fuse and the module keep blowing together. I'll admit I understand the basics on 1 wire HEI systems, but that's...
1982 Chevrolet Corvette 5.7L Cuts out VIN: 1G1AY0708C
This car will flood the front throttle body after a WOT acceleration. The injector pulse stays at full ground even after the throttle pedal is released. The rear TB injector pulse goes back to normal every time. The ECM has two seperate injector driver curcits...

Fixes & Summaries for GM
Fix/Summary Answers
2007 GMC Yukon XL 1500 Denali 6.2L MIL Lamp on VIN: 1GKFK66857
Fellow techs. Many thanks for the replies. I realize I pulled the trigger too quickly on replacing the modules. I took an ohms reading at the aldl and had 120 ohms. I now know this means an open in the communication circuit. I finally found the junction block ... Trouble codes: U0073 (no communication with ecm), U0121 (no communication with trans).
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