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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 6, 2021
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2002 Chevrolet Tahoe LS 5.3L 1-2 shift VIN: 1GNEC13Z62
Customer swapped a 2002 5.3 (Gen II) to a 2006 5.3 (Gen III) prior to bringing it to me. He used original Gen II Throttle Body. Transmission now has a hard shift from 1st to 2nd gear. It shifted smooth prior to motor swap. Does the PCM need to be rep...

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