OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationCharging System Light
This light will come on briefly
when the ignition is turned on, and the engine is not running, as a check to show
it is working.
It should go out when the engine is started. If it stays on, or comes on while
driving, there may be a problem with the electrical charging system. Have it checked ...
TPMS Malfunction Light
The TPMS will not function properly if one or more of the TPMS sensors are missing
or inoperable. When the system detects a malfunction, the low tire warning light
flashes for about one minute and then stays on for the remainder of the ignition
cycle. The malfunction light comes on at each ign ...
Engine Compartment Overview
Windshield Washer Fluid Reservoir. See Washer Fluid on page 10-19.
Engine Coolant Surge Tank and Pressure Cap. See Cooling System on page 10-13.
Engine Oil Dipstick. See Engine Oil on page 10-8.
Engine Oil Fill Cap. See Engine Oil on page 10-8.
Engine Cooling Fan (Out of View). See Co ...