GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the protective cover from the underhood junction block.
  3. Remove the compressor relay from the underhood junction block.

Installation Procedure

  1. Install the compressor relay to the underhood junction block.
  2. Install the protective hood to the underhood junction block.
  3. Connect the negative battery cable.
  4. Test the circuit operation.