K 2500 Suburban 4WD V8-5.7L VIN R (1999)
5. Remove the Y-pipe and the catalytic converter assembly.
6. Remove the muffler and the catalytic converter assembly.
INSTALLATION PROCEDURE
NOTICE: Refer to Fastener Notice in Service Precautions.
1. Install the flange seals, the studs and the nuts connecting the Y-pipe, catalytic converter assembly to the exhaust manifold.
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Tighten the studs to 22 Nm (16 ft. lbs.).
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Tighten the nuts to 64 Nm (47 ft. lbs.).
2. Install the muffler and the catalytic converter assembly.
3. Position the Y-pipe and the catalytic converter assembly to the flat flange.
4. Install the nuts to the flat flange studs.
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Tighten the nuts to 64 Nm (47 ft. lbs.).