Action Taken When the DTC Sets

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The PCM stores the DTC information into memory when the diagnostic runs and fails.
The PCM will store conditions which were present when the DTC set as Failure Records data only.
The PCM disables most outputs.
The transmission defaults to a predetermined gear.
The torque converter clutch (TCC) operation is inhibited.
The instrument panel cluster (IPC) displays a message.
The malfunction indicator lamp (MIL) will not illuminate.