TPM System Enable

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The service replacement PDM/Switch assembly comes with the TPM system disabled to allow the same part number PDM to be used in both TPM and non TPM equipped vehicles. Once the TPM option is enabled in the PDM, it can not be disabled. Before proceeding with the steps below ensure the vehicle is TPM equipped (UJ6), refer to Label - Service Parts ID in General Information.

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With the scan tool select Chassis.
Select Tire Pressure Monitor.
Select Special Functions.
Select TPM Option Enable.
Press the exit key to escape.