Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsRecommended Fluids and
Lubricants
Usage
Fluid/Lubricant
Automatic Transmission
DEXRON-VI Automatic Transmission Fluid
Diesel Exhaust Aftertreatment System
Diesel Exhaust Fluid (GM Part No. 19286291, in Canada 88862660) or
diesel exhaust fluid that meets ISO 22241-1 or displays the API Die ...