Is it OK to put different size tires on a car?
Once you choose a tire size for your vehicle, you’ll want to stick with that size when you buy replacements. The reason for this is that a differently sized tire can confuse your speedometer and even cause damage to your vehicle’s anti-lock braking systems and stability system calibrations.
How much difference in tire size is acceptable?
As a general rule, you want replacement tires that are within 3 percent of the diameter (height) measurement of your existing tires’ diameter — assuming your current tires are what your owner’s manual recommends.
What all terrain tires does GMC use?
GMC Sierra base and SLE trucks have 17-inch wheels and come with General Grabber HTS tires as a general all-season, multi-terrain tire.