GMC Duramax Diesel 2015 Owner's Manual page 110

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.
For Pickups
Replace the fuel filter when the
CHANGE FUEL FILTER message in
the Driver Information Center (DIC)
comes on. See Fuel System
Messages on page 5-13. If the fuel
filter has not been replaced, or if the
vehicle has been driven 36 000 km/
22,500 mi or more since the fuel
filter was last replaced, replace
the filter and reset the message.
The diesel fuel filter may need to be
replaced more frequently, based on
biodiesel usage, driving in climates
with severe dust, off-road driving,
or towing a trailer for extended
periods. The fuel filter should be
replaced at least every 2 years.
For Vans
Replace the fuel filter when the
CHANGE FUEL FILTER message in
the Driver Information Center (DIC)
comes on. See Fuel System
Messages on page 5-13. If the fuel
filter has not been replaced, or if the
vehicle has been driven 36 000 km/
22,500 mi or more since the fuel
filter was last replaced, replace the
filter and reset the message. The
diesel fuel filter may need to be
replaced more frequently, based on
biodiesel usage, driving in climates
with severe dust, off-road driving,
Service and Maintenance
or towing a trailer for extended
periods. The fuel filter should be
replaced at least every 2 years.
Also, inspect and clean the fuel
pump screen, if necessary, at each
fuel filter inspection or replacement.
11-7