Exhaust Muffler Replacement (L94 with MWN)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exhaust Muffler Replacement (L94 with MWN)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
WARNING: Refer to Exhaust Service Warning . WARNING: Refer to Eye Protection Warning . Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1	Exhaust Clamp Fastener CAUTION: Refer to Fastener Caution . Tighten 28 (21 lb ft)
2	Exhaust Isolators NOTE: Lubricate for ease of installation.
3	Exhaust Resonator Clamp Fastener Tighten 55 (40 lb ft)
4	Exhaust Muffler Procedure Loosen the exhaust muffler clamp fastener (1) and detach the muffler from the 3-way catalytic converter. Loosen the exhaust resonator clamp fastener (3) and detach the exhaust muffler (4) from the exhaust resonator. Remove the exhaust muffler (4) from the exhaust isolators (2). NOTE: Remove/cut-off alignment pin on resonator and align exhaust system by hand if parts are replaced as NEW.