Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Using the Tire Sealant and Compressor Kit to Temporarily Seal and Inflate a
Punctured Tire
Follow the directions closely for correct sealant usage.
When using the tire sealant and compressor kit during cold temperatures, warm the kit in a heated environment for five minutes.
This will h ...
After Off-Road Driving
Remove any brush or debris that has collected on the underbody or chassis, or under the hood. These accumulations can be a fire hazard.
After operation in mud or sand, have the brake linings cleaned ...
Hitches
Use the correct hitch equipment. See your dealer or a hitch dealer for assistance.
○ The rear bumper on the vehicle is not intended for hitches. Do not attach rental
hitches or other bumper-t ...