Description: For Exhaust Muffler. 6.0L, rear floor, regular cab. 5.3 & 6.2L. rear regular cab. 6.6L DIESEL. rear floor std cab. 6.6L diesel, rear floor, regular cab. 4.3L, rear floor, std cab. 3/4 & 1 TON 6.0L. rear floor std cab. 4.3L. rear regular cab. 1/2 TON 4.8, 5.3, 6.0 & 6.2L. rear floor std cab. Can help prevent exhaust heat from damaging your vehicle's undercarriage and engine compartment components This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors