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 InformationDolly Towing
To tow the vehicle with the two rear wheels on the ground and the front wheels
on a dolly:
Put the front wheels on a dolly.
Shift the automatic transmission into P (Park) or a manual transmission
into 1 (First) gear.
Set the parking brake.
Clamp the steering wheel in a straight-ah ...
Driving for Better Fuel Economy
Driving habits can affect fuel mileage. Here are some driving tips to get the
best fuel economy possible.
Avoid fast starts and accelerate smoothly.
Brake gradually and avoid abrupt stops.
Avoid idling the engine for long periods of time.
When road and weather conditions are appropriate, ...
Off-Road Recovery
The vehicle's right wheels can drop off the edge of a road onto the shoulder
while driving. Follow these tips:
Ease off the accelerator and then, if there is nothing in the way, steer
the vehicle so that it straddles the edge of the pavement.
Turn the steering wheel about one-eigh ...