RAM 1500 2019 User Manual page 209

Mileage or time passed
(whichever comes first)
Or Years:
Or Kilometers:
Flush and replace the
coolant at 10 years
150,000 miles (240,000 km)
whichever comes first.
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent trailer
towing.
Change the transfer case fluid.
Inspect and replace PCV valve if
necessary.
1. The spark plug change interval is mileage based only, yearly intervals do not apply.
2 3 4 5
engine
or
6 7 8 9 10
X
X
X
11 12 13 14
X
15
X
X
207