Yukon/Denali 4WD V8-4.8L VIN V (2005)
Install the new heat shield (see parts list below) onto the muffler as shown above.
Install three straps, P/N 10391259, so that the strap screw head will be located on top of the muffler.
Tighten
Tighten the strap screw to 4 N.m (35 lb in).
Cut off the excess strap material and bend the strap over the strap screw head as indicated above. Remove the exhaust pipe clamp.
ONLY 6.0L and 8.1L equipped vehicles require a new exhaust pipe clamp, P/N 15103174.
On 6.0L and 8.1L equipped vehicles only, install a new exhaust pipe clamp, P/N 15103174, on the exhaust pipe.
Reposition the muffler in the correct position.
Slide the muffler forward into position, aligning the studs with the rear of the catalytic converter.
Install the nuts securing the muffler to the catalytic converter, but DO NOT tighten at this time.
Apply a soapy solution to the following areas in order to ease the installation of the hangers. The inner diameter of the exhaust pipe hanger
The exhaust pipe hanger rod
Press the exhaust pipe hangers over the exhaust pipe hanger rods.
Tighten
Tighten the muffler nuts by hand until each contacts the metal flange.
Tighten the muffler nuts to 45 N.m (33 lb ft).
On 6.0L and 8.1L equipped vehicles only, tighten the exhaust clamp to 50 N.m (36 lb ft).
