Powertrain Control Module: Removal
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Disconnect negative battery cable. Locate PCM at left front corner of engine compartment. See Fig 1. Release PCM cover from mounting tabs on PCM bracket.
- Remove PCM cover from PCM. Loosen PCM harness connector bolts. See Fig 2. Disconnect PCM harness connectors. Release the PCM spring latch. Release PCM mounting tabs. Remove PCM.