Programming TDC Offset (Cab & Chassis, Chevy Express, Cutaway, RV Cutaway, Savana, Savana Camper Special & Savana Special - 6.5L)

The PCM will automatically activate the TDC offset program when the engine coolant is more than 170°F (77°C). If the PCM is not programmed with a TDC offset, a DTC P1214 will set.