2015 GMC Sierra 2500 HD Tire Sizes
Factory original equipment (OE) tire specifications.
Base
Tire Size
LT245/75R17/E
Load Index
121
Speed Rating
R
Base
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
S
Base
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
R
Denali
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
S
Denali
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
R
Denali
Tire Size
LT265/60R20/E
Load Index
121
Speed Rating
S
SLE
Tire Size
LT245/75R17/E
Load Index
121
Speed Rating
R
SLE
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
S
SLE
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
R
SLE
Tire Size
LT265/60R20/E
Load Index
121
Speed Rating
S
SLT
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
S
SLT
Tire Size
LT265/70R18/E
Load Index
124
Speed Rating
R
SLT
Tire Size
LT265/60R20/E
Load Index
121
Speed Rating
S