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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1468 (Engine Exhaust System) >> Diagnostic Information and Procedures >> Exhaust Noise

Exhaust Noise

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. 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
  1. Compare to a known good vehicle.
  2. Inspect for a damaged or failed muffler or resonator.
  3. Replace the faulty muffler or resonator. Refer to Muffler Replacement  .
External rattle or vibration noise
  1. Inspect for a bent or loose hanger, loose heat shield, or loose clamp.
  2. Inspect for a exhaust pipe causing interference.
  3. Repair or replace the affected component. Refer to the affected component's service procedure.
Internal rattle
  1. Test the components by tapping with a rubber mallet to confirm a rattle.
  2. Replace the faulty catalytic converter, resonator, or muffler. Refer to one of the following procedures:
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