GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed
6.6 Duramax TD V8 (445 hp) SRW Automatic
2020 — 2023
Diesel
Duramax L5P
Oil capacity: 9.5 l
Recommended Engine Oils
High mileage (>150 000 km)
Priority to 40-viscosity oils for enhanced protection of worn components
Recommended Additives & Treatments
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Select year of manufacture GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 hp) SRW Automatic
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2020
GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 hp) SRW Automatic2021
GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 hp) SRW Automatic2022
GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 hp) SRW Automatic2023
GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 hp) SRW Automatic