GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2009
🢒
Lucerne
🢒
Engine
🢒
Engine Exhaust
🢒 Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement
Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement LZ9 or LGD
Removal Procedure
Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
Remove the muffler to catalytic converter nuts (1).
Suitably support the exhaust system.
Remove the center exhaust hanger to the rear suspension support bracket bolts.
Remove the rear exhaust hanger bracket to rear compartment rail bolt (1).
With the aid of an assistant, lower and remove the exhaust system (2).
Remove and discard the catalytic converter to muffler gasket.
Remove the rear exhaust hanger to exhaust hanger bracket nut.
Remove the rear exhaust hanger bracket from the rear exhaust hanger.
Installation Procedure
Install the rear exhaust hanger bracket to the rear exhaust hanger.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the rear exhaust hanger to exhaust hanger bracket nut and tighten to
30 N·m (22 lb ft)
.
Install a NEW catalytic converter to muffler gasket over the catalytic converter studs.
With the aid of an assistant, raise and install the exhaust system (2).
Install the muffler to catalytic converter nuts until snug.
Install the rear exhaust hanger bracket to rear compartment rail bolt (1) and tighten to
50 N·m (37 lb ft)
.
Install the center exhaust hangers to rear suspension support bracket bolts and tighten to
30 N·m (22 lb ft)
.
Tighten the muffler to catalytic converter nuts (1) previously installed in step 5 to
25 N·m (18 lb ft)
.
Lower the vehicle.