GM Service Manual Online
For 1990-2009 cars only

The accessory power plug can be used to connect electrical equipment such as a cellular phone or CB radio. It is located behind the carpeting, on the passenger's side toe-board, at the top left corner near the body control module. Be sure to follow the installation instructions included with the equipment.

To use the accessory power plug, do the following:

  1. Remove the toe-board panel by pulling at the top of each corner of the panel.
  2. Locate the black connector at the top left corner of the compartment near the body control module above the two white diagnostic connectors.
  3. Disconnect the connector pigtail by pulling forward on the plastic locking tab and pull the connection apart from the wire harness.

The plug has the following three separate wires:

    • The orange wire connects to battery power.
    • The yellow wire connects to ignition power. (Power is only available when the ignition is in ON.)
    • The black wire connects to ground.

Notice: If you splice wires directly into the vehicle electrical wiring harness incorrectly, you could damage your vehicle's electrical system. The repairs would not be covered by your warranty. Do not splice wires directly into the vehicle electrical wiring harness.