2021 GMC Sierra 2500 HD Tire Sizes
Factory original equipment (OE) tire specifications.
AT4
Tire Size
LT275/70R18/E
Load Index
125
Speed Rating
S
AT4
Tire Size
LT275/70R18/E
Load Index
125
Speed Rating
R
AT4
Tire Size
LT275/65R20/E
Load Index
126
Speed Rating
S
Base
Tire Size
LT245/75R17/E
Load Index
121
Speed Rating
R
Base
Tire Size
LT265/70R17/E
Load Index
121
Speed Rating
Q
Base
Tire Size
LT275/70R18/E
Load Index
125
Speed Rating
S
Denali
Tire Size
LT275/65R20/E
Load Index
126
Speed Rating
S
SLE
Tire Size
LT245/75R17/E
Load Index
121
Speed Rating
R
SLE
Tire Size
LT265/70R17/E
Load Index
121
Speed Rating
Q
SLE
Tire Size
LT275/70R18/E
Load Index
125
Speed Rating
S
SLE
Tire Size
LT275/65R20/E
Load Index
126
Speed Rating
S
SLT
Tire Size
LT275/70R18/E
Load Index
125
Speed Rating
S
SLT
Tire Size
LT275/65R20/E
Load Index
126
Speed Rating
S