GM 15220678
Muffler W/Tpipe

To replace the Muffler first remove that right rear tire and wheel. Then you'll have remove the stabilizing link and that rear axle brace. Apply the correct jack stand behind rear axle, and then unscrew the lower shock absorber mounting bolt. Lower the rear axle to remove the rear coil spring, to record the markings of coil spring to ensure proper installation. Then, take out the retaining nuts from the Catalytic Converter flange and separate the Exhaust Pipe from the hangers at the Muffler and Catalytic Converter. Remove the rear retaining nuts of the exhaust hangers, and with help slide the Muffler collection to the rear and lower the rear axle if needed for clearance. Start with turning the Muffler assembly around to release it from the rear axle housing and lower it to release it from the rear valance as you take it off from the vehicle. For installation, lift the Muffler assembly with the help to position it on the rear axle housing, slide it to pass through the rear valance and forward to pass through the rear axle housing. Put the retaining nuts to the Catalytic Converter and finger tighten them then install the Muffler assembly and Catalytic Converter in the hangers. Screw in finger the retaining nuts of the rear hangers and install into the Catalytic Converter flange retaining nuts, finger tightening them to the 45 nm (33ft. Lbs.). Tighten the rear Exhaust Hanger retain nut to 25 nm (18 ft. Lbs.) and make sure that all reference markings are in their proper location before installing the rear coil spring. Raise the rear axle to install the lower shock absorber bolt and nut. Tighten the shock absorber bolt to 80 Nm (59 ft-lbs). Replace the rear axle brace, stabilizer link and nut, tighten the stabilizer link to 35 nm (25 ft. Lbs.), and lastly replace the right rear tire and wheel.

Tighten it to 80 Nm (59 ft. lbs.).