2021 GMC Sierra 2500 HD equipped with 6.6L V8 Gas OHV, 6.6L V8 Flex OHV, 6.6L V8 Diesel OHV Turbo
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2-SPD ELEC SHIFT TRANSFER CASE(NQF),SWITCH ACTIVATED 2-SPEED TRANSFER CASE(NQH) 4WD
2021 GMC Sierra 2500 HD equipped with 6.6L V8 Gas OHV, 6.6L V8 Flex OHV, 6.6L V8 Diesel OHV Turbo
2-SPD ELEC SHIFT TRANSFER CASE(NQF),SWITCH ACTIVATED 2-SPEED TRANSFER CASE(NQH) 4WD