OnStar Additional Information
IntroductionRear Brake Rotor Replacement
Special Tools
CH 41013 Rotor Resurfacing Kit
CH 42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Warning: Refer to Brake Dust Warning in the Preface section.
Remove rear brake caliper bracket. Refer to Rear Brake Caliper Br ...
Low-Profile Tires
If the vehicle has P225/45R18 size tires, they are classified as low‐profile
tires. These tires are designed for very responsive driving on wet or dry pavement,
however, may produce more road noise and tend to wear faster.
Notice: Low-profile tires are more susceptible to damage from road ...
Ultrasonic Parking Assist
The Ultrasonic Rear Parking Assist (URPA) system assists the driver with parking
and avoiding objects while in R (Reverse). URPA operates at speeds less than 8 km/h
(5 mph). The sensors on the rear bumper detect objects up to 2.5m (8 ft) behind
the vehicle, and at least 20 cm (8 in) off the gr ...