Important: Lubricate the brake support plate on the six surfaces that contact the brakes shoes with a thin coat of GM P/N 1051344 or the equivalent. Do not allow the lubricant to contact the brake linings.
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.
Tighten
Tighten the bolts to 121 N·m (89 lb ft).
Tighten
Tighten the bolt with washer to 152 N·m (112 lb ft).