| Part | Manufacturer | OEM Part # | Price | Notes |
| Muffler |
| 5 3/4 Box |
| 134" Wheelbase |
| Without Luxury Edition | GMO | 15798941 | 953.18 | |
| With Luxury Edition | GMO | 15798942 | 1018.47 | |
| 153" Wheelbase | GMO | 15798962 | 1431.47 | |
| 6 1/2 Box |
| 1/2 Ton |
| Extended Cab |
| 143" Wheelbase | GMO | 15798940 | 1146.68 | |
| 3/4 Ton |
| Extended Cab |
| 143" Wheelbase |
| Federal | GMO | 15798954 | 1423.71 | |
| California |
| Option 1 | GMO | 15798947 | 1567.88 | |
| Option 2 | GMO | 15798947 | 1567.88 | |
| Crew Cab |
| 153" Wheelbase |
| Without 9, 200 GVWR | GMO | 15798954 | 1423.71 | |
| With 9, 200 GVWR |
| Federal | GMO | 15798955 | 1325.61 | |
| California | GMO | 15798946 | 1286.32 | |
| 8 Box |
| Without Extended Cab |
| Without Rear Exit Exhaust |
| All |
| 3/4 Ton |
| Standard Cab |
| Option 1 |
| Without CNG |
| Federal |
| Emission Code NT8 | GMO | 15798958 | 1263.25 | |
| Emission Code NT9 | GMO | 15798960 | 1317.53 | |
| California |
| Emission Code NC1 | GMO | 15798950 | 1284.04 | |
| Emission Code NC8 |
| Emission Code NT8 | GMO | 15798958 | 1263.25 | |
| Emission Code NT9 | GMO | 15798960 | 1317.53 | |
| With CNG |
| 8500 GVWR | GMO | 15798950 | 1284.04 | |
| 9200 GVWR | GMO | 15798960 | 1317.53 | |
| Fleetside Box | GMO | 15798950 | 1284.04 | |
| Option 2 | GMO | 15798960 | 1317.53 | |
| Crew Cab |
| Without CNG |
| Federal | GMO | 15798958 | 1263.25 | |
| California |
| Emission Code NC8 | GMO | 15798958 | 1263.25 | |
| With CNG |
| Fleetside Box | GMO | 15798948 | 1301.45 | |
| Base Body/Chassis | GMO | 15798958 | 1263.25 | |
| 1 Ton |
| Standard Cab |
| Option 1 |
| Without 9,900 GVWR |
| Federal | GMO | 15798961 | 1218.03 | |
| California |
| Emission Code NC1 | GMO | 15798951 | 1190.15 | |
| Emission Code NC8 | GMO | 15798961 | 1218.03 | |
| With 9,900 GVWR |
| Federal | GMO | 15798960 | 1317.53 | |
| California |
| Emission Code NC1 | GMO | 15798950 | 1284.04 | |
| Emission Code NC8 | GMO | 15798960 | 1317.53 | |
| Option 2 | GMO | 15798960 | 1317.53 | |
| Option 3 | GMO | 15798961 | 1218.03 | |
| Crew Cab |
| Without 9,900 GVWR |
| Option 1 |
| Federal | GMO | 15798959 | 1276.33 | |
| California |
| Emission Code NC1 | GMO | 15798953 | 1332.27 | |
| Emission Code NC8 | GMO | 15798959 | 1276.33 | |
| Option 2 | GMO | 15798953 | 1332.27 | |
| With 9,900 GVWR |
| California | GMO | 15798948 | 1301.45 | |
| With Extended Cab |
| Without Rear Exit Exhaust |
| 3/4 Ton |
| Without Base Body/Chassis |
| Federal | GMO | 15798956 | 1259.33 | |
| California |
| Emission Code NC1 | GMO | 15798949 | 1289.35 | |
| Emission Code NC8 | GMO | 15798956 | 1259.33 | |
| With Base Body/Chassis | GMO | 15798956 | 1259.33 | |
| 1 Ton |
| Without Base Body Chassis |
| Without 9, 900 GVWR |
| Option 1 |
| Federal | GMO | 15798957 | 1246.85 | |
| California |
| Emission Code NC1 | GMO | 15113070 | 1019.35 | |
| Emission Code NC8 | GMO | 15798957 | 1246.85 | |
| Option 2 | GMO | 15798957 | 1246.85 | |
| With 9, 900 GVWR |
| Federal | GMO | 15798956 | 1259.33 | |
| California |
| Emission Code NC1 | GMO | 15798949 | 1289.35 | |
| Emission Code NC8 | GMO | 15798956 | 1259.33 | |
| With Base Body/Chassis | GMO | 15798956 | 1259.33 | |