I have disc brakes front and rear and I need the rear replaced first then the front
Here you go. Rears then fronts.
Rear Disc Brake Pads Replacement
Notice: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
Important: Use a small flat-bladed tool and lift the inner edge caliper boot next to the piston to release any trapped air.
Important: Ensure that the wear sensor is positioned at the leading edge, upward, of the inner pad during forward wheel rotation.
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 2 caliper guide pin bolts to 42 N·m (31 lb ft).