2020 GMC Sierra 1500 Base — 255/70R17
2020 GMC Sierra 1500 Base
- Factory size
- 255/70R17
- Load / speed
- 112S
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What size tires does the 2020 GMC Sierra 1500 Base take?
The factory tire size for the 2020 GMC Sierra 1500 Base is 255/70R17.
The catalog lists it at load index 112, speed rating S (up to 112 mph).
This trim is also listed with 265/70R17. Check which one your vehicle has.
| Wheels | Size | Load index | Speed rating |
|---|---|---|---|
| All wheels | 255/70R17 | 112 | S |
| All wheels | 265/70R17 | 115 | S |
Confirm the size printed on the sidewall of your current tire or on the tire placard in the driver's door jamb before you buy. Replacement tires should meet or exceed the vehicle's load index and speed rating.