Colorado 4WD L5-3.7L (2007)
weights could result in improper fit, and such weights may fall off the wheel.
Balancing of the tire and wheel assembly must be performed on a computerized balancer, capable of static and dynamic wheel balance modes.
Assemblies should be balanced to within 1/4 ounce on either rim flange. Proper cones and adapters should be used free of nicks and burrs to ensure
proper balancing.
Wheels
Center Cap
Install the center cap onto the wheel after the tire has been mounted and balanced but BEFORE the assembly is installed onto the vehicle. The preferred
method for center cap installation is to push in by hand. As an alternate use a nonmetallic object to push the center cap into place. Attempting to
"hammer-on" the caps may result in damage to the cap.
Wheel (Lug) Nuts
ALUMINUM WHEELS REQUIRE SPECIAL WHEEL NUTS. Each wheel nut should be torqued in the appropriate torque sequence (refer to graphic)
and to 140 N.m (103 lb ft). The torque should be re-checked after the first 160 km (100 mi). To help protect the wheels from theft, a wheel lock kit is
also available.
Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to an accident. Be sure
to use the correct wheel nuts.
Care/Cleaning
Use soap, hot water and a 100% cotton cloth to clean and polish the new wheels. If using a wheel cleaner, be sure to select one that will not harm the
wheel surface, such as GM Chrome and Wire Wheel Cleaner, P/N 1052929 (in Canada, use 10953202). Avoid car washes that use carbide tipped
brushes, as these may damage the wheel's finish. Periodically clean the backside of the wheel to remove road grime, brake dust and grease.
Vehicle Modifications
Tire Label:
After installing the recommended P245/60R18 tires, place the provided tire label on the vehicle. The new tire label should be located within the red box,
over the top of the original tire label found on the door jamb. To locate the label within the red box use the upper left hand edge of the red line as a
guide. When properly placed, the new tire label will obscure the original tire information. Be sure that the surface is clean and dry. The surface
temperature should not be less than 21°C (65°F). The label is provided as a guide for tire inflation pressures and information relevant to occupant/cargo
capacities.
Tire Type/pressure Selection (2007-2008 Model Year Only)
To provide a more accurate function of the Tire Pressure Monitoring System, it is necessary to update the Body Control Module (BCM) with the correct
tire type and pressure information. Using the Tech 2(R), follow the steps listed below to select the appropriate tire type/pressure:
Install the scan tool.
Turn ignition ON with the engine OFF.
