Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Exhaust Seals

Courtesy of GENERAL MOTORS CORP.

Remove the catalytic converter. Refer to Catalytic Converter Replacement (LY6 with Exhaust Flange) or Catalytic Converter Replacement (L9H with Exhaust Flange) or Catalytic Converter Replacement (Gen IV Engines with Exhaust Clamp) or Catalytic Converter Replacement (LFA with Exhaust Clamp) or Catalytic Converter Replacement (LMM) .
Remove and discard the appropriate exhaust seal (1 or 2). (1500 series shown, 2500 series similar).