Owner’s Manual

Table Of Contents
Black plate (6,1)
GMC Yukon/Yukon XL Owner Manual - 2011
11-6 Service and Maintenance
First Engine Oil Change After
Every 160 000 km/100,000 Miles
.
Automatic transmission fluid
change (normal service). See
Automatic Transmission Fluid on
page 1012.
.
Fourwheel drive only: Transfer
case fluid change (normal
service). Check vent hose at
transfer case for kinks and
proper installation. Check
to be sure vent hose is
unobstructed, clear, and free of
debris. During any maintenance,
if a power washer is used to
clean mud and dirt from the
underbody, care should be
taken to not directly spray the
transfer case output seals.
High pressure water can
overcome the seals and
contaminate the transfer case
fluid. Contaminated fluid will
decrease the life of the transfer
case and should be replaced.
.
Spark plug replacement and
spark plug wires inspection.
An Emission Control Service.
First Engine Oil Change After
Every 240 000 km/150,000 Miles
.
Engine cooling system drain,
flush, and refill (or every
five years, whichever occurs
first). See Engine Coolant on
page 1017. An Emission
Control Service.
.
Engine drive belts inspection
for fraying, excessive cracks,
or obvious damage (or every
10 years, whichever occurs
first). Replace, if needed.