OEM Tire Size for 2008 GMC Sierra 2500HD Extended Cab
Maintaining the factory-recommended tire dimensions is crucial for the safety, fuel efficiency, and handling of your 2008 GMC Sierra 2500HD Extended Cab 6.0 V8 6AT (360 HP). The standard equipment tire size for this specific trim is 245/75R16.
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Thinking about upgrading your wheels? Before changing your rim diameter from the factory 16-inch size, always use our Tire Size Calculator to ensure your speedometer remains accurate.