Sierra 1500 4WD V8-5.3L VIN T (2004)
Exhaust Pipe Gasket: Service and Repair
Exhaust Seal Replacement
Removal Procedure
1. Raise and suitably support the vehicle.
2. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Remove the clip from around the engine harness and the oxygen sensor pigtail.
2. Disconnect the connector position assurance (CPA) retainer.
3. Disconnect the forward oxygen sensor electrical connector.
3. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Unclip the oxygen sensor electrical connector from the hose clip.
2. Disconnect the CPA retainer.
3. Disconnect the oxygen sensor electrical connector (1).
4. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Disconnect the CPA retainer.
2. Disconnect the oxygen sensor electrical connector (1).
5. Support the catalytic converter or exhaust manifold pipe with adjustable jackstands.
