Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
Service and Maintenance
57
.
If equipped with the engine air
filter life system, check the air
filter life percentage.
If necessary, replace the engine
air filter and reset the engine air
filter life system. See
. If the
vehicle is not equipped with the
engine air filter life system,
inspect the engine air cleaner
filter. See
.
Check engine coolant level. See
or
.
.
Visually check for fluid leaks.
.
Visually inspect fuel system for
damage or leaks.
.
Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.