Special Application Services

• Allison Transmission™ Vehicles Only: Replace external transmission filter at first engine oil change only.
• Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ 1,000 mi and 9 700 km/6,000 mi.
• 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:

    Replacing the Engine Air Cleaner/ Filter
    1. Locate the air cleaner/filter assembly. See Engine Compartment Overview on page 10‑6. 2. Loosen the four screws on the cover of the housing and lift up the cover. 3. Remove the engine a ...

    Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)
    To assist customers who are deaf, hard of hearing, or speech impaired and who use Text Telephones (TTYs), GMC has TTY equipment available at its Customer Assistance Center. Any TTY user can communicat ...

    USB-Supported File and Folder Structure
    The radio supports: • Up to 700 folders • Up to eight folders in depth • Up to 65,535 files. • Folder and file names up to 64 bytes • Files with an .mp3 or .wma file extension • AAC ...