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. Tilt the cab.
  3. Refer to Cab Tilting in General Information.

  4. Disconnect the electrical connectors to the starter relay.

  5. Object Number: 624406  Size: SH
  6. Remove the starter relay mounting bolts.
  7. Remove the starter relay from the frame.

Installation Procedure


    Object Number: 624406  Size: SH
  1. Connect the starter relay to the frame.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the starter relay mounting bolts.
  4. Tighten
    Tighten the starter relay mounting bolts to 23 N·m (17 lb ft).

  5. Connect the electrical connectors to the starter relay.
  6. Connect the negative battery cable.
  7. Lower the cab.