2021 GMC Sierra Tire Pressure & Sizes
On this page you can first find a list of the trims for the 2021 GMC Sierra along with the tire sizes you can expect to find on them.
Once you have your correct tire size you can then scroll down to the pressures chart and cross-reference it to find the recommended front and rear pressure rating.
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Trims & Tire Sizes
Tire Pressures
Best Winter Tires
Best Summer Tires
Best Highway Tires
Best All Season Tires
Best All Terrain Tires
2021 GMC Sierra Trims
GMC Sierra models built during 2021 were offered in the following trims with these tire sizes fitted as standard.
| Trim Name | Tire Size/s |
|---|---|
| 1500 AT4 |
|
| 1500 Base Model |
|
| 1500 Denali |
|
| 1500 Elevation |
|
| 1500 SLE |
|
| 1500 SLT |
|
| 2500 HD AT4 |
|
| 2500 HD Base Model |
|
| 2500 HD Denali |
|
| 2500 HD SLE |
|
| 2500 HD SLT |
|
| 3500 HD |
|
| 3500 HD Dually |
|
2021 Sierra Tire Pressures By Size
GMC Sierra models built in 2021 with the following tire sizes are recommended to be kept at the following pressures.
| Tire Size | Front | Rear |
|---|---|---|
| 255/70R17 112S | 35 PSI | 35 PSI |
| 265/65R18 114T | 35 PSI | 35 PSI |
| 265/70R17 115S | 35 PSI | 35 PSI |
| 275/50R22 111T | 36 PSI | 36 PSI |
| 275/60R20 115S | 32 - 35 PSI | 35 PSI |
|
LT265/60R20/C 110/107S "LT" tires are designed for "light-trucks" carrying loads such as pickups |
41 PSI | 41 PSI |
|
LT265/70R17/C 112/109Q "LT" tires are designed for "light-trucks" carrying loads such as pickups |
45 PSI | 45 PSI |
|
LT275/65R18/C 113/110Q "LT" tires are designed for "light-trucks" carrying loads such as pickups |
41 PSI | 41 PSI |
|
LT245/75R17/E 121/118R "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 80 PSI |
|
LT265/70R17/E 121/118Q "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 80 PSI |
|
LT275/65R20/E 126/123S "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 80 PSI |
|
LT275/70R18/E 125/122S "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 80 PSI |
|
LT235/80R17/E 120/117R "LT" tires are designed for "light-trucks" carrying loads such as pickups |
70 - 80 PSI | 65 - 80 PSI |
What Do These Numbers Mean?
When comparing tires you will find that they display various numbers and codes along the edges.
These numbers help you choose the right tire (size and speed rating) for your car and the following image shows you what each of them mean:
