This should help you.
Front Disc Brake Pads Replacement
GM replacement brake or equivalent lining material is recommended for all GM vehicles in order to maintain the balance between front and rear brake performance. GM replacement brake parts have been carefully selected in order to provide the proper brake balance for purposes of both stopping distance and control over the full range of operation conditions. Installation of front or rear brake pad material with performance different than that of the GM replacement parts recommended for this vehicle can change the intended brake balance of this vehicle.
Use a screwdriver to lift up the outboard pad retaining spring (2) so that it will clear the caliper center lug (3).
Important: Lift the inner edge of the caliper boots next to the pistons. Press out any trapped air. The boots must lay flat below the level of the piston faces.
Do not lubricate the threads.
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.
Using a screwdriver, push the pin boot over the shoulder of the pin bolt. The pin boot must be securely in the grove of the pin bolt.
Tighten Tighten the slide pin bolts to 108 N·m (80 lb ft).