GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C Pickup - 2WD (CNG) 🢒 Engine 🢒 Engine Controls - 5.0L and 5.7L 🢒 Engine Control Unit Adapter Replacement

Removal Procedure

    Object Number: 322575 Size: SH
  1. Open the engine control unit (ECU) adapter clip.
  2. Remove the ECU with the connectors still connected.
  3. Remove the bolts and the adapter from the bracket.

Installation Procedure

    Object Number: 322575 Size: SH

    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.

  1. Install the ECU adapter and the ECU adapter bolts.

    2. Tighten
    Tighten the bolts to 12 N·m (108 lb in).

  2. Install the ECU with the connectors still connected.
  3. Close the ECU adapter clip.