See also:

Power Steering Fluid
See Engine Compartment Overview for reservoir location. When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless a leak is suspected in the syst ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...

What to Use
WARNING Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before the proper coolant mixture will. The coolant warni ...