Circuit Description
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module (TCM) continually performs a series of processing steps, known as a processing loop, during normal operation. The TCM must complete the processing loop within a specific time limit. The TCM will set if it does not complete two consecutive loops inside a predetermined time interval.
DTC P0613 is a type C DTC.