Exhaust Noise

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Exhaust Noise

Condition	Action
CAUTION: While engine is operating, the exhaust system will become extremely hot. To prevent burns avoid contacting a hot exhaust system. DEFINITION: An audible or physical noise due to a faulty component or damaged components causing a loose or misaligned exhaust system resulting in a rattle or vibration noise (buzz, groan, hum).Refer to Symptoms - Engine Exhaust prior to beginning this table.
Popping or hissing noise	Exhaust leak. Refer to Exhaust Leakage .
Loud exhaust	Compare to a known good vehicle. Inspect for a damaged or failed muffler or resonator. Replace the faulty muffler. Refer to Muffler Replacement (4.8L and 5.3L Engines) or Muffler Replacement (6.0L and 8.1L Engines) .
External rattle or vibration noise	Inspect for a bent or loose hanger, loose heat shield, or loose clamp. Inspect for a exhaust pipe causing interference. Repair or replace the affected component. Refer to the affected component's service procedure.
Internal rattle	Test the components by tapping with a rubber mallet to confirm a rattle. Replace the faulty catalytic converter, or muffler. Refer to one of the following procedures: Catalytic Converter Replacement (4.8L and 5.3L Engines) Catalytic Converter Replacement (6.0L and 8.1L Engines) Muffler Replacement (4.8L and 5.3L Engines) Muffler Replacement (6.0L and 8.1L Engines)