# 2003 GMC Sonoma Tire Size

There are multiple tire sizes for your 2003 GMC Sonoma that depend upon the trim level. Look for your trim level below to get a color-coded explanation of your tire size. Then pick the best tire size for your 2003 GMC Sonoma.

Trim Options:

### SL 4x4 Ext. Cab

## P235/70R15 102

### Simplified Size: 235-70-15

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 GMC Sonoma is **P235/70R15 102S**. A color-coded explanation of the 2003 GMC Sonoma's tire size is shown below.

P | This letter denotes the intended use of the tire.
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235 | This number indicates that your tire has a width of 235 millimeters. | ||||||

15 | The tire size was designed to fit rims or wheels that are 15 inches in diameter. | ||||||

102 | This tire has a load index of 102, which means it's capable of carrying a load of 1870 pounds (850 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

70 | This number means that your tire has an aspect ratio of 70%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width. In this case, the sidewall height works out to be 164 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
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This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### SLS 4x4 Crew CabSLS 4x4 Ext. Cab

## P235/75R15 105

### Simplified Size: 235-75-15

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 GMC Sonoma is **P235/75R15 105S**. A color-coded explanation of the 2003 GMC Sonoma's tire size is shown below.

P | This letter denotes the intended use of the tire.
| ||||||

235 | This number indicates that your tire has a width of 235 millimeters. | ||||||

15 | The tire size was designed to fit rims or wheels that are 15 inches in diameter. | ||||||

105 | This tire has a load index of 105, which means it's capable of carrying a load of 2035 pounds (925 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

75 | This number means that your tire has an aspect ratio of 75%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 75% of the width. In this case, the sidewall height works out to be 176 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |