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 InformationReduced Engine Power Light
The reduced engine power light should
come on briefly as the engine is started. If it does not come on, have the vehicle
serviced by your dealer.
This light, along with the malfunction indicator lamp, displays when a noticeable
reduction in the vehicle's performance occurs.
The vehicle c ...
Lap-Shoulder Belt
All seating positions in the vehicle have a lap-shoulder belt.
The following instructions explain how to wear a lap-shoulder belt properly.
Adjust the seat, if the seat is adjustable, so you can sit up straight.
To see how, see “Seats” in the Index.
Pick up the latch plate and pull ...
Engine Exhaust
Warning
Engine exhaust contains carbon monoxide (CO) which cannot be seen
or smelled. Exposure to CO can cause unconsciousness and even death.
Exhaust may enter the vehicle if:
The vehicle idles in areas with poor ventilation (parking
garages, tunnels, deep snow that may block underbody a ...