Special Application Services

• Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi.
• Have underbody flushing service performed once a year.

    See also:

    TTY Users
    OnStar has the ability to communicate to the deaf, hard&-ofhearing, or speech&-impaired customers while in the vehicle. The available dealer&-installed TTY system can provide in-vehicl ...

    Using the “Digit Store” Command
    If an unwanted number is recognized by the system, say “Clear” at any time to clear the last number. To hear all of the numbers recognized by the system, say “Verify” at any time. 1. Press a ...

    Regular Cab Models
    1. If the child restraint manufacturer recommends that the top tether be attached, attach and tighten the top tether to the top tether anchor, if your vehicle has one. Refer to the child restraint in ...