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:

    Back–Up Lamp
    Removal of the lamp assembly is not required to replace the back-up lamp bulb. To replace one of these lamps: 1. Open the liftgate. See Liftgate on page 2‑9. 2. Remove the interior trim acces ...

    Tips and Troubleshooting Chart
    ...

    Range Selection Mode (Allison® Transmission or Hydra-Matic® 6-Speed Transmission)
    The vehicle may have a Range Selection Mode. The Range Selection Mode helps control the vehicle's transmission and vehicle speed while driving down hill or towing a trailer by letting you select a d ...