LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1994 >> Yukon 6.5 S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Electronic Transmission >> Trouble Code Charts >> Code 39, TCC Stuck Off >> Notes
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Code 39, TCC Stuck Off: Notes

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Checks the mechanical status of the TCC. When PCM commands the TCC solenoid off, TCC slip speed should increase.