2018 GMC Sierra Tire Pressure & Sizes
On this page you can first find a list of the trims for the 2018 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.
Jump To:
Trims & Tire Sizes
Tire Pressures
Best Winter Tires
Best Summer Tires
Best Highway Tires
Best All Season Tires
Best All Terrain Tires
2018 GMC Sierra Trims
GMC Sierra models built during 2018 were offered in the following trims with these tire sizes fitted as standard.
| Trim Name | Tire Size/s |
|---|---|
| 1500 2wd Crew Cab |
|
| 1500 2wd Crew Cab w/Performance Brake |
|
| 1500 2wd Double Cab |
|
| 1500 2wd Double Cab w/Performance Brake |
|
| 1500 2wd Reg Cab w/Performance Brake |
|
| 1500 2wd Regular Cab |
|
| 1500 4wd Crew Cab |
|
| 1500 4wd Crew Cab w/Performance Brake |
|
| 1500 4wd Double Cab |
|
| 1500 4wd Double Cab w/Performance Brake |
|
| 1500 4wd Reg Cab w/Performance Brake |
|
| 1500 4wd Regualar Cab |
|
| 2500 HD 2wd Crew Cab |
|
| 2500 HD 2wd Double Cab |
|
| 2500 HD 2wd Regular Cab |
|
| 2500 HD 4wd Crew Cab |
|
| 2500 HD 4wd Crew Cab All Terrain X |
|
| 2500 HD 4wd Double Cab |
|
| 2500 HD 4wd Regular Cab |
|
| 3500 HD 2wd |
|
| 3500 HD 2wd Dually |
|
| 3500 HD 4wd |
|
| 3500 HD 4wd Dually |
|
2018 Sierra Tire Pressures By Size
GMC Sierra models built in 2018 with the following tire sizes are recommended to be kept at the following pressures.
| Tire Size | Front | Rear |
|---|---|---|
| 265/65R18 114S | 35 PSI | 35 PSI |
|
LT265/70R17/C 112Q "LT" tires are designed for "light-trucks" carrying loads such as pickups |
45 PSI | 45 PSI |
|
P255/70R17 110S "P" tires are designed for carrying "passengers" only |
35 PSI | 35 PSI |
|
P265/65R18 112T "P" tires are designed for carrying "passengers" only |
35 PSI | 35 PSI |
|
P265/70R17 113S "P" tires are designed for carrying "passengers" only |
35 PSI | 35 PSI |
|
P275/55R20 111S "P" tires are designed for carrying "passengers" only |
32 PSI | 32 - 35 PSI |
|
P285/45R22 110H "P" tires are designed for carrying "passengers" only |
35 PSI | 35 PSI |
|
LT245/75R17/E 121R "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 80 PSI |
|
LT265/60R20/E 121S "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 PSI | 75 PSI |
|
LT265/70R18/E 124S "LT" tires are designed for "light-trucks" carrying loads such as pickups |
60 - 65 PSI | 80 PSI |
|
LT235/80R17/E 117R "LT" tires are designed for "light-trucks" carrying loads such as pickups |
70 - 80 PSI | 65 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:
