Chevrolet Silverado: Wheels and Tires / Tire Designations

Chevrolet Silverado 2019-2025 Owners Manual / Vehicle Care / Wheels and Tires / Tire Designations

Tire Size

The examples show a typical passenger vehicle and light truck tire size.

Passenger (P-Metric) Tire

(1) Passenger (P-Metric) Tire : The United States version of a metric tire sizing system. The letter P as the first character in the tire size means a passenger vehicle tire engineered to standards set by the U.S. Tire and Rim Association.

(2) Tire Width : The three-digit number indicates the tire section width in millimeters from sidewall to sidewall.

(3) Aspect Ratio : A two-digit number that indicates the tire height-to-width measurements. For example, if the tire size aspect ratio is 75, as shown in item C of the tire illustration, it would mean that the tire's sidewall is 75 percent as high as it is wide.

(4) Construction Code : A letter code is used to indicate the type of ply construction in the tire. The letter R means radial ply construction; the letter D means diagonal or bias ply construction.

(5) Rim Diameter : Diameter of the wheel in inches.

(6) Service Description : These characters represent the load index and speed rating of the tire. The load index represents the load carrying capacity a tire is certified to carry. The speed rating is the maximum speed a tire is certified to carry a load.

Light Truck (LT-Metric) Tire

(1) Light Truck (LT-Metric) Tire : The United States version of a metric tire sizing system. The letters LT as the first two characters in the tire size mean a light truck tire engineered to standards set by the U.S. Tire and Rim Association.

(2) Tire Width : The three-digit number indicates the tire section width in millimeters from sidewall to sidewall.

(3) Aspect Ratio : A two-digit number that indicates the tire height-to-width measurements. For example, if the tire size aspect ratio is 75, as shown in item 3 of the light truck (LT-Metric) tire illustration, it would mean that the tire's sidewall is 75 percent as high as it is wide.

(5) Rim Diameter : Diameter of the wheel in inches.

(6) Load Range : Load Range.

(7) Service Description : The service description indicates the load index and speed rating of a tire. If two numbers are given as in the example, 120/116, then this represents the load index for single versus dual wheel usage (single/dual). The speed rating is the maximum speed a tire is certified to carry a load.

Tire Sidewall Labeling

Useful information about a tire is molded into the sidewall. The examples show a typical passenger and light truck tire sidewall. Passenger (P-Metric)/Spare Tire (1) Tire Size : The tire size code is a combination of letters and numbers used to define a particular tire's width, height, aspect ratio, construction type, and service description...

Tire Terminology and Definitions

Air Pressure : The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch)...

Other information:

Chevrolet Silverado 2019-2025 Owners Manual: Securing Child Restraints (With the Seat Belt in the Rear Seat)

When securing a child restraint with the seat belts in a rear seat position, study the instructions that came with the child restraint to make sure it is compatible with this vehicle. If the child restraint has the LATCH system, see Lower Anchors and Tethers for Children (LATCH System) for how and where to install the child restraint using LATCH...

Chevrolet Silverado 2019-2025 Owners Manual: Exterior Cargo Lamps

The cargo lamps provide more light in the cargo area or on the sides of the vehicle, if needed. The lamps inside the pickup box, in the tailgate handle, for the hitch, and/or the cargo mirror lamps also turn on, if equipped. If the vehicle is in P (Park), R (Reverse), or N (Neutral) the Cargo Lamp Switch causes the lights to cycle through the following states for each button press: - Initial Press: - CHMSL/Cargo Bed Lights - On - Cargo Mirror Lights - On - Cargo Switch Indicator (if equipped) - On - Next Press: (if with in 5 seconds of the previous button press): - CHMSL/Cargo Bed Lights - On - Cargo Mirror Lights - Off - Cargo Switch Indicator (if equipped) - On - Next Press: - CHMSL/Cargo Bed Lights - Off - Cargo Mirror Lights - Off - Cargo Switch Indicator (if equipped) - Off Become familiar with and follow all state and local laws that apply to cargo lamp operation...