GM Data wrote:Starter Motor Replacement 4.3L
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the differential carrier shield mounting bolts, if equipped.
Remove the differential carrier shield, if equipped.
Remove the starter mounting bolts.
Disconnect the wires from the solenoid.
Remove the starter from the vehicle.
Note the location of the shims, if equipped.
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.
Connect the wires to the solenoid.
Tighten the battery positive cable nut to 9 N·m (80 lb in).
Tighten the engine wiring harness to starter nut to 1.9 N·m (17 lb in).
Install the starter and the inboard starter mounting bolt. Do not tighten.
Install the starter shims, if equipped.
Install the outboard starter mounting bolt. Tighten
Tighten the starter mounting bolts to 50 N·m (37 lb ft).
Install the differential carrier shield, if equipped.
Install the differential carrier shield mounting bolts, if equipped.
Tighten the differential carrier bolts to 25 N·m (18 lb ft).
Lower the vehicle.
Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
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