Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
390
Service and Maintenance
indicator are located on the
reservoir. Do not add fluid above the
MAX line.
Check and refill the brake fluid
reservoir:
1. Clean the reservoir caps before
removal to prevent dirt or water
from entering the reservoir.
2. Visually inspect the fluid level.
3. If necessary, add brake fluid
from a clean unopened
container.
4. Use only DOT 3 brake fluid
certified to meet manufacturer
specifications.
5. Fill the brake fluid reservoir to
the MAX line, but do not
exceed the MAX fill
specifications.
If brake fluid must be added
frequently to maintain the proper
level in the master cylinder, there is
either rapid pad wear or a fluid
system leak. A more frequent and
thorough brake inspection is
required.
Electrical
Batteries
Battery life and performance varies
greatly depending on duty cycle.
Conditions such as short runs
between starts, low ambient
operating temperatures, use of
battery current without the engine
running, and vibration will reduce
battery life. Battery life is also
affected by the condition of
interrelated components, such as
alternators, battery cables,
connections, engine startability, and
starter. To maximize battery life, it is
important to keep electrical
components, battery boxes, and the
engine in top condition and to
minimize or eliminate electrical
loads when the engine is not
running.
Battery life can be extended by
keeping the batteries fully charged
at all times. Periodically charging
the batteries with a battery charger
may be able to charge the batteries
more completely than the vehicle
’
s
alternator in certain severe
applications. Use a battery charger
(float charger) that automatically
reduces amperage or shuts off
when the batteries are fully charged.
Use of a Midtronics 55-Amp Power
Supply/Smart (Battery) Charger,
Model Number PCX550,
Part Number PSC550CCKIT (or
equivalent), available through your
GM dealer, is recommended.
Cold batteries resist charging.
Battery performance can be
improved by regularly or even
periodically storing vehicles and
charging batteries with an automatic
float charger for 8 to 24 hours in a
warm garage during the cold winter
months.