For GM 2500/3500 HD trucks equipped with the 6.6L L5P Duramax Diesel engine.

- OEM for GM Part #: 84564686 (Please confirm the part number before ordering)
- Replaces previous GM part numbers: 84368753, 84744850, 84789749

Fitment:
for Chevrolet Silverado 2500 HD & 3500 HD:
Models: Custom, High Country, LT, LTZ, WT, ZR2
Body Styles: Crew Cab, Extended Cab, Standard Cab
Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025
Engines: 6.6L V8 Diesel OHV Turbocharged
Trim Levels: Custom Crew Cab, Custom Extended Cab, High Country Crew Cab, LT Crew Cab, LT Extended Cab, LT Standard Cab, LTZ Crew Cab, LTZ Extended Cab, WT Crew Cab, WT Extended Cab, ZR2 Crew Cab

for GMC Sierra 2500 HD & 3500 HD:
Models: AT4, Denali, Denali Ultimate, Pro, SLE, SLT
Body Styles: Crew Cab, Extended Cab, Standard Cab, Cab & Chassis
Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025
Engines: 6.6L V8 Diesel OHV Turbocharged
Trim Levels: AT4 Crew Cab, Denali Crew Cab, Denali Ultimate Crew Cab, Pro Crew Cab, Pro Extended Cab, Pro Standard Cab, SLE Crew Cab, SLE Extended Cab, SLT Crew Cab, SLT Extended Cab

for Chevrolet Silverado 1500 (2019):
Models: Custom, High Country, LT, LTZ, WT, RST
Body Styles: Crew Cab, Extended Cab, Standard Cab
Engines: 2.7L 4-cylinder, 3.0L 6-cylinder Diesel, 5.3L V8 Gas OHV, 6.2L V8 Gas OHV
Trim Levels: Custom Crew Cab, High Country Crew Cab, LT Crew Cab, LT Extended Cab, LT Trail Boss Crew Cab, LTZ Crew Cab, RST Crew Cab, WT Crew Cab

for GMC Sierra 1500 (2019):
Models: AT4, Denali, SLE, SLT
Body Styles: Crew Cab, Extended Cab, Standard Cab
Engines: 2.7L 4-cylinder, 3.0L 6-cylinder Diesel, 5.3L V8 Gas OHV, 6.2L V8 Gas OHV
Trim Levels: AT4 Crew Cab, Denali Crew Cab, SLE Crew Cab, SLT Crew Cab