Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
Technical Data
409
Application
Capacities
Metric
English
*Cooling system refill capacities vary considerably due to differences in engine models and optional equipment, in
addition to the amount of coolant remaining in the system after draining. Total capacity is approximately
30 L (8 gal).
If the system has been flushed with water or cleaner, a significant amount of the rinse water will remain in the
system. In this case, refilling with a mixture with a higher percentage (60
–
66%) of coolant concentrate is advised in
order to achieve a final mixture closer to 50/50. Fill the system and run the vehicle until the thermostat opens.
Before adding any fluid, check the coolant concentration and add additional water or concentrated undiluted
coolant to adjust the concentration. Run the vehicle and retest for coolant volume level (set to MAX line) and
concentration level.
**Do not overfill the DEF tank. See
.
A variety of transmissions are available for your vehicle. Refer to the Allison Automatic Transmission Manual for
the most up-to-date specific service instructions, required capacities, and transmission fluids.
All quantities are approximate. When adding, be sure to fill to the appropriate level, as recommended in this
manual. Recheck fluid level after filling.
Engine Specifications
Engine
VIN Code
Type
6.6L 8-Cylinder Turbo Diesel (L5D Engine)
PV
V8