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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 28, 2020
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Open Help Requests for GM
Help Request Answers
2001 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK24161
This truck was towed in for cranks but will not start. Truck would crank and start and die. Scanned for codes and found p1626 anti theft, u1000 class 2 serial codes. At this time all modules were communicating but anti theft was active. We did VTD relearn ... Trouble codes: P1626 (Anti theft), U1000 (class 2 serial data), U1016 (lost ecm communication), P1255 (P0650- MIL control), P0650 (MIL control), P1643 (wait to start circuit)

Fixes & Summaries for GM
Fix/Summary Answers
2004 Chevrolet Tahoe LS 5.3L No Start VIN: 1GNEK13Z84
Thank you Dan from S.Texas for a quick and correct response. For some reason I did not consider the throttle position. When reading sensor data pids, sure enough it was at 78% when should have read 0. Replaced the APP sensors/pedal assembly, relearn throttle p...
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