Tires for the 1981 GMC C20
The 1981 GMC C20 uses 9.5R16.5, depending on trim. Choose your trim’s size to see tires in stock.
Tire sizes by trim
| Trim | Original tire sizes |
|---|---|
| Pick-up 2wd | 9.5R16.5 |
Confirm your size on the driver’s door placard; options and package changes can affect fitment.
Frequently asked questions
What size tires does a 1981 GMC C20 take?
The 1981 GMC C20 came with 9.5R16.5 depending on trim. The exact size is printed on the driver’s door placard.