Confirm Tire SizeWhere can I find my tire size?
Shopping for tires? Select tire size to proceed.
1990 GMC C2500 Sierra
GMC equips your vehicle with more than one possible size during production.
Please select the size installed on your vehicle from the choices below.
Original Equipment Wheel Diameter: 16"
LT245/75R16/EOriginal Equipment Wheel Diameter: 16"
LT225/75R16/D