{
"lazyNodes": false,
"abFitnotesFlag": false,
"abCrawlReviews": false,
"productOptionsCookie": false,
"orderDelayFlag": false,
"skipSessionCookie": false,
"covidMessage": false,
"fullTitleCookie": false,
"nrLoggerCookie": false,
"checkoutReviewCookie": false,
"productOptionSeqCookie": false,
"maintenanceFlag": false,
"bufferETACookie": false,
"multiShippingDiscountFlag": false,
"newFitmentFlag": false,
"surveyOptInFlag": false,
"crossSellFlag": false,
"skuMappingFlag": false,
"paySplitCookie": false,
"callDisableFlag": false,
"zipPaymentFlag": "u",
"hassleFreeReturn": false,
"lifetimeReplacement": false,
"cpn_off": false
}2021 GMC Sierra 3500 HD Exhaust Systems
Shop Catalog
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed, Extended Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Rear Wheel Drive
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed, Extended Cab Pickup, Rear Wheel Drive
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Rear Wheel Drive
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed, Extended Cab Pickup, Rear Wheel Drive
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L Will not fit vehicles equipped with a 5th wheel hitch
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L Will not fit vehicles equipped with a 5th wheel hitch
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L Will not fit vehicles equipped with a 5th wheel hitch
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L Will not fit vehicles equipped with a 5th wheel hitch
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L Will not fit vehicles equipped with a 5th wheel hitch
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L Crew Cab Pickup, 172.0 in. Wheelbase, Short Bed
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L Crew Cab Pickup, 172.0 in. Wheelbase, Short Bed
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L Crew Cab Pickup, 172.0 in. Wheelbase, Short Bed
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L Crew Cab Pickup, 172.0 in. Wheelbase, Short Bed
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L Standard Cab Pickup, 141.5 in. Wheelbase, Long Bed
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L Crew Cab Pickup, RWD
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L Crew Cab Pickup, RWD
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L Crew Cab Pickup, 4WD
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L Crew Cab Pickup, 4WD
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L Standard Cab Pickup, RWD
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L Rear Wheel Drive, DIESEL, Crew Cab Pickup; Installation Hardware Included; Replacement System
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L Four Wheel Drive, DIESEL, Crew Cab Pickup; Installation Hardware Included; Replacement System
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L Four Wheel Drive, DIESEL, Extended Cab Pickup; Installation Hardware Included; Replacement System
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L Four Wheel Drive, DIESEL, Crew Cab Pickup; Installation Hardware Included; Replacement System
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L Four Wheel Drive, DIESEL, Crew Cab Pickup; Installation Hardware Included; Replacement System
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L Crew Cab Pickup, RWD
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L Crew Cab Pickup, RWD
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L Crew Cab Pickup, 4WD
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L Crew Cab Pickup, 4WD
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L Standard Cab Pickup, RWD
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L DIESEL, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 172.0 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 172.0 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L GAS, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L GAS, Extended Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L GAS, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L GAS, Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L GAS, Extended Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 172.0 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 172.0 in. Wheelbase; Except Vehicles With Dual Rear Wheels
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed; Crew Cab Pickup; 158.9 in. Wheelbase; Except Vehicles With Dual Rear Wheels
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed, Extended Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 82.2 in. Bed, Extended Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
- 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 82.2 in. Bed, Crew Cab Pickup, Four Wheel Drive, Excludes Dual Rear Wheel Configurations
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Popular Products
MBRP ARMOR LITE EXHAUST SYSTEM
This MBRP Armor Lite exhaust system delivers unique sound with an MBRP Touring Profile. It offers performance exhaust note without the aggressive volume and provides better exhaust flow for optimum performance.
- Good d...
MAGNAFLOW EXHAUST SYSTEMS
Equip your ride with the straight-through flow design of MagnaFlow’s exhaust systems for smooth, satisfying acoustics along with improved torque, horsepower and gas mileage. MagnaFlow, a leading manufacturer of high performa...
BORLA S-TYPE EXHAUST SYSTEM
Rev up your ride with the “Aggressive Plus” acoustics and advanced technologies offered by Borla’s S-Type exhaust system. This exhaust features mandrel-bent tubing and the evolved straight-through design of Bor...
FLOWMASTER OUTLAW EXTREME CAT-BACK EXHAUST SYSTEM
Flowmaster’s Outlaw Extreme cat-back exhaust system is dyno-proven to dramatically increase the power band, giving you more horsepower, fuel economy and torque, plus the most aggressive sound you can ge...
AFE POWER LARGE BORE HD EXHAUST SYSTEM
aFe’s LARGE Bore HD exhaust system allows you to squeeze even more power out of your diesel with a free-flowing mandrel-bent stainless steel exhaust that encourages maximum exhaust velocity and noticeable performance...
Helpful Automotive Resources
