GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual page 375

374 Service and Maintenance
Warning (Continued)
you could be burned. Never turn
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to cool.
2. Coolant Level: Do not remove
the pressure cap unless the
coolant is cool. Ensure the fluid
level, if cold, is within the
minimum and maximum fluid
level range as marked on the
plastic translucent reservoir.
If hot, the fluid level must be
above the minimum mark, but
below the fill neck.
3. Air Cleaner: Check the air
cleaner housing and hoses for
loose connections or damage.
For element replacement, see
Engine Air Cleaner/Filter 0 299.
4. Radiator and Charge Air
Cooler: Check for loose
mounting and damage. Inspect
the condition of all the hoses
for damage, cracks, and leaks.
Inspect for foreign material on
the face of the cooling
package. Carefully brush away
the collected materials without
bending the cooling fins to
maintain proper airflow through
the cooling package.
5. Drive Belts (Out of View):
Inspect all belts for frays,
cracks, loose fibers, or visible
signs of wear. With the engine
off, press on all belts to test for
proper belt tensioner
performance.
6. Windshield Washer Fluid Level:
Inspect the reservoir and verify
that the fluid level is not empty
and has enough fluid to last
until the next inspection.
If additional fluid is required,
see Lubricant and Sealer
Specifications under
Capacities and Specifications
0 408, for the correct fluid type
before filling. Do not use water
in freezing climates.
Check the electrical wiring for
proper security, damage, and
chafing.
Check for signs of fluid puddles
under the vehicle, or wet
components in the engine
compartment.
Right Side of Cab
1. Cab Structure: Check the body
panels such as doors, fairings,
air shield, and cab extenders
for signs of breaks or damage.
Check the condition of cab
mounting brackets and tilt hood
latches.
2. Diesel Exhaust Fluid (DEF)
Tank: Check to see that the
DEF tank and cap are secured