GMC Sierra 1500 Tire Pressure (Recommended PSI)
TL;DR
GMC Sierra 1500 cold tire pressure ranges from about 32 to 45 PSI depending on generation, trim, and tire size (LT load-range tires need much higher pressure than P-metric tires) - check your driver-door placard for the number that applies to your truck.
Why there is no single number
The GMC Sierra 1500 has been sold with many different factory tire sizes across its 3rd generation (2014-2018) and 4th generation (2019-2026), and GM assigns a different cold inflation pressure to each combination of trim and tire size. A base work-truck riding on P-metric all-season tires needs far less pressure than an AT4 or off-road package riding on LT (Light Truck) load-range tires. Quoting one PSI for the whole model line is inaccurate - the correct figure depends on which tires are actually mounted on your specific truck.
Where to find the correct number for your truck
The authoritative source is always the tire and loading information placard on the driver-side door edge or door jamb (sometimes on the door post itself). It lists the original-equipment tire size and the exact cold front and rear PSI GM specified for your truck. This can also be cross-checked against the owner's manual chapter on tires and loading, and the manufacturer towing guide if you tow trailers, since some manuals list a higher rear pressure for heavy loads. If you changed tire size or brand from factory, use the pressure on the sidewall of your new tire as a maximum-cold-pressure reference and consult a tire professional, since the placard number was calculated for the original-equipment size.
Verified pressures by generation and trim
The table below lists only figures found on trim/tire-size-specific placard data. Where GM has used the same tire size across several trims, we grouped them.
| Generation / years | Trim or tire size | Front (PSI) | Rear (PSI) |
|---|---|---|---|
| 3rd gen (2014-2018) | Base/SLE/SLT - P255/70R17, P265/65R18, P265/70R17 | 35 | 35 |
| 3rd gen (2014-2018) | Base/SLE - LT265/70R17 (load-range tire) | 45 | 45 |
| 3rd gen (2014-2018) | Denali/SLE/SLT - P275/55R20 | 32 | 32 |
| 4th gen (2019-2026) | Base/SLE - 255/70R17, 265/70R17, 265/65R18 | 35 | 35 |
| 4th gen (2019-2026) | Base/SLE - LT265/70R17 (load-range tire) | 45 | 45 |
| 4th gen (2019-2026) | Denali/Elevation/SLT/SLE - 275/60R20 | 32-35 | 35 |
| 4th gen (2019-2026) | Denali/Elevation/SLE - 275/50R22 | 36 | 36 |
| 4th gen (2019-2026) | AT4 - LT275/65R18 (off-road load-range tire) | 41 | 41 |
Why LT-tire trims run so much higher
Trims fitted with LT (Light Truck) load-range tires - the base-trim LT265/70R17 and the AT4 LT275/65R18 - carry a much heavier maximum load rating, so GM specifies 41-45 PSI cold, versus 32-36 PSI for the P-metric and Euro-metric passenger-style tires used on SLE, SLT, Denali, and Elevation trims with standard wheels. Mixing these up (for example inflating an LT-tire truck to 35 PSI) under-inflates the tire relative to its rating and can cause overheating or premature wear under load.
Towing and heavy-load adjustments
Some Sierra 1500 owner's manuals specify a higher rear cold pressure - sometimes up to the tire's maximum sidewall rating - when towing near the truck's maximum trailer weight. Check the towing section of your specific model-year manual before a heavy tow, and reduce back to the placard number for unloaded, everyday driving.
Frequently asked questions
Summary
| 3rd gen base/SLE/SLT (P-metric) | 35 / 35 PSI (F/R) |
|---|---|
| 3rd gen base/SLE (LT265/70R17) | 45 / 45 PSI (F/R) |
| 3rd gen Denali/SLE/SLT (275/55R20) | 32 / 32 PSI (F/R) |
| 4th gen base/SLE (255/70R17, 265/70R17, 265/65R18) | 35 / 35 PSI (F/R) |
| 4th gen base/SLE (LT265/70R17) | 45 / 45 PSI (F/R) |
| 4th gen Denali/Elevation/SLT (275/60R20, 275/50R22) | 32-36 / 35-36 PSI (F/R) |
| 4th gen AT4 (LT275/65R18) | 41 / 41 PSI (F/R) |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see GMC Sierra 1500: Common Problems, Fault Codes & Repairs.
Frequently asked questions
What is the correct tire pressure for my GMC Sierra 1500?
It depends on your generation, trim, and factory tire size - there is no single figure for the whole model line. Verified placard data shows 32-36 PSI for most P-metric and Euro-metric tire setups (SLE, SLT, Denali, Elevation) and 41-45 PSI for LT load-range tires (base-trim LT265/70R17 and AT4 LT275/65R18). Check your driver-door placard for the number specific to your truck.
Why is my AT4 tire pressure so much higher than my neighbor's SLT?
The AT4 uses an LT275/65R18 load-range off-road tire rated for higher pressure (41 PSI on verified 2022 placards), while a typical SLT rides on a passenger-style 275/60R20 or 265/65R18 tire rated around 35 PSI. Both are correct for their own tire - the LT tire's stronger sidewall construction needs the extra pressure to carry its rated load and resist sidewall damage off-road.
Should I use the pressure printed on the tire sidewall instead of the door placard?
No. The sidewall number is the tire's maximum cold pressure, not GM's recommended pressure for your vehicle. Always use the door placard or owner's manual figure for daily driving, and only approach the sidewall maximum when your manual specifically calls for it under heavy load or towing conditions.
Does towing change my recommended tire pressure?
On many Sierra 1500 model years, yes - the owner's manual towing section may call for a higher rear cold pressure when hauling near maximum trailer weight. Check the specific towing guide for your model year rather than assuming, since this adjustment is not shown on the standard door placard.