For 1990-2009 cars

# LOCKING WHEEL NUTS / PROPER WHEEL BALANCING

#### MODELS AFFECTED: ALL

Whenever a heavier, solid locking wheel nut is used to replace a standard nut, it should be installed nearest the valve stem, and a 1/2 ounce balance weight should be added 180 DEG opposite the locking nut.

This situation will usually occur on styled wheels. For improved appearance, the balance weight should be installed on the wheel's inboard side.

When rotating tires, always re-install the locking nut nearest the tire valve stem so that it remains opposite the 1/2 ounce balance weight.

This procedure will improve the on-car wheel balance by compensating for the heavy locking wheel nut. This does not apply to the light weight, two piece locking nuts.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.