Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to all GM passenger cars and trucks (including medium duty), model years 2000 to 2019.

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  All GM Passenger Cars and Trucks (includes Medium Duty) 2000 2019

• Effective February 2017 (May 2017 for Canada), a Generation 3, 4 or 5 Hunter Road Force Balancer is designated as essential dealer equipment.

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  Effective February 2017 (May 2017 for Canada), a Generation 3, 4 or 5 Hunter Road Force Balancer is designated as Essential Dealer Equipment.

Possible causes

• Road Force is a measurement of both sidewall stiffness and how much the assembly is egg shaped.

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  Road Force is a measurement of both sidewall stiffness and how much the assembly is “Egg Shaped.”

• Excessive Road Force can also be produced by incorrect tire mounting or improper bead seating to the rim.

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  Excessive Road Force can also be produced by incorrect tire mounting or improper bead seating to the rim.

Steps to confirm (in the document’s order)

1. Because tires can become temporarily flat-spotted, drive the vehicle at least 24 km (15 mi) at 89 km (55 mph (= 88.5 km/h)) or more before measuring.

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   Because tires can sometimes become temporarily flat-spotted, which will affect force variation, it is important that the vehicle be driven at least 24 km (15 mi) at 89 km (55 mph) or more prior to measuring.

2. Before measuring, adjust tire pressure to the usage pressure on the vehicle's tire placard.

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   Tire pressure must also be adjusted to the usage pressure on the vehicle's tire placard prior to measuring.

Repair

• 180 Matching: use a tire changer to rotate the rim 180 degrees relative to the tire, aligning the V mark with the valve stem, then mount the assembly on the balancer again.

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  Use a tire changer and rotate the rim 180 degrees relative to the tire, aligning the “V” mark with the valve stem. Mount the assembly on the balancer.

Caution

• When mounting a GM wheel on a balancer/force variation machine, always use the wheel's center pilot hole; it is the primary centering mechanism on all GM wheels and the bolt holes are secondary.

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  When mounting a GM wheel to a wheel balancer/ force variation machine, always use the wheel's center pilot hole. This is the primary centering mechanism on all GM wheels; the bolt holes are secondary.

• Service equipment that removes tread rubber by grinding, buffing or trueing is not recommended and may void the tire warranty.

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  Any type of service equipment that removes tread rubber by grinding, buffing or trueing is NOT recommended, and may void the tire warranty.