GMC Yukon Owner's Manual page 344

I
Short TripKity Maintenance Schedule
--
Gasoline Engines
I
48,000 Miles (80 000 km)
0
Change engine oil and filter (or every
3
months, whichever occurs first).
An Enxission Control Service.
0
Lubricate chassis components; see footnote
##
(or every
3
months, whichever occurs first).
Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
**
DATE SERVICED B Y ACTUAL MILEAGE
50,000 Miles (83 000 km)
0
Change automatic transmission fluid and
filter if the vehicle is mainly driven under
one or more of these conditions:
-
In heavy city traffic where the outside
temperature regularly reaches 90°F
(32°C) or higher.
-
In hilly or mountainous terrain.
-
When doing frequent trailer towing.
-
Uses such as found in taxi, police or
delivery service.
I f you do 1wt use yowr velzicle under any
o f
tlwse corzditiorzs, the fluid and>filter do
not
require changing.
DATE ACTUAL MILEAGE SERVICED B Y
7-16