Sierra Classic 2500 4WD V8-6.0L (2007)
Remove the nuts securing the muffler to the catalytic converter.
On 6.0L and 8.1L equipped vehicles only, loosen the exhaust pipe clamp.
Do not use oil base lubricants on the rubber exhaust hangers.
Apply a soapy solution to the exhaust pipe hanger rods in order to ease the removal of the exhaust hangers.
Pry the exhaust hangers free from the exhaust pipe hanger rods.
It is not necessary to remove the muffler from the vehicle to replace the muffler heat shield.
Reposition the muffler to gain access to the muffler heat shield.
Use extreme caution not to damage the muffler when removing the heat shield from the muffler.
Using an air-powered hack saw blade, or equivalent, cut off the existing muffler heat shield just as the heat shield rises off of the muffler. See the
illustration above.
Remove the heat shield from the muffler.
Hammer flush the remaining heat shield to the muffler.
The new heat shield should not come in contact with the remaining muffler heat shield. The new heat shield should not come in contact with the
horizontal lock seam on the muffler.
