2005 GMC Envoy XL 5.3L V8 LH6 VIN: M. Notes: Exhaust Muffler Gasket -- New. GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.