Jeep grand cherokee 2015 Owner's Manual page 682

M
680 MAINTENANCE SCHEDULES
A
I
Mileage or time passed
N
(whichever comes first)
T
E
N
Or Years:
A
Or Kilometers:
N
C
E
Change transfer case fluid.
S
C
Inspect and replace PCV valve if
H
necessary.
E
** The spark plug change interval is mileage based only,
D
U yearly intervals do not apply.
L
E
S
8
2 3 4 5 6 7 8 9 10 11
X
12 13 14 15
X