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.

Trim Size Icon 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

  • 265/65R18 Pressure Icon Cart Icon
  • 275/65R18 Pressure Icon Cart Icon
  • 265/60R20 Pressure Icon Cart Icon
  • 275/60R20 Pressure Icon Cart Icon
1500 Base Model

  • 255/70R17 Pressure Icon Cart Icon
  • 265/70R17 Pressure Icon Cart Icon
1500 Denali

  • 275/60R20 Pressure Icon Cart Icon
  • 275/50R22 Pressure Icon Cart Icon
1500 Elevation

  • 275/60R20 Pressure Icon Cart Icon
1500 SLE

  • 255/70R17 Pressure Icon Cart Icon
  • 265/70R17 Pressure Icon Cart Icon
  • 265/65R18 Pressure Icon Cart Icon
  • 275/60R20 Pressure Icon Cart Icon
1500 SLT

  • 265/65R18 Pressure Icon Cart Icon
  • 275/60R20 Pressure Icon Cart Icon
  • 275/50R22 Pressure Icon Cart Icon
2500 HD AT4

  • 275/70R18 Pressure Icon Cart Icon
  • 275/65R20 Pressure Icon Cart Icon
2500 HD Base Model

  • 245/75R17 Pressure Icon Cart Icon
  • 265/70R17 Pressure Icon Cart Icon
  • 275/70R18 Pressure Icon Cart Icon
2500 HD Denali

  • 275/65R20 Pressure Icon Cart Icon
2500 HD SLE

  • 245/75R17 Pressure Icon Cart Icon
  • 265/70R17 Pressure Icon Cart Icon
  • 275/70R18 Pressure Icon Cart Icon
  • 275/65R20 Pressure Icon Cart Icon
2500 HD SLT

  • 275/70R18 Pressure Icon Cart Icon
  • 275/65R20 Pressure Icon Cart Icon
3500 HD

  • 275/70R18 Pressure Icon Cart Icon
  • 275/65R20 Pressure Icon Cart Icon
3500 HD Dually

  • 235/80R17 Pressure Icon Cart Icon

Tire Pressure Icon 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:

Tire codes guide

GMC Sierra

GMC Sierra Image

We have found 13 different tire sizes for the 2021 GMC Sierra as well as the correct pressure to inflate them to.