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Diagnostic Aids

If vehicle is road tested because of a TCC related problem, ensure switch states do not change while in 3rd gear because TCC will disengage. If switches change state, carefully check wire routing and connections.

Fig 1: Chart C-8A, TCC Troubleshooting Chart - 2 of 2 (3.1L PFI A, J & L Bodies)
G92D14822Courtesy of GENERAL MOTORS CORP.
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