Starting And Operating; New Vehicle Break-In - GMC 2012 Yukon/Yukon XL Owner's Manual

WARNING (Continued)
When you carry something
inside the vehicle, secure
it whenever you can.
Do not leave a seat folded
down unless you need to.
There is also important loading
information for off-road driving in
this manual. See Loading Your
Vehicle for Off-Road Driving
under
.
Starting and
Operating

New Vehicle Break-In

The vehicle does not
need an elaborate break-in. But it
will perform better in the long run
if you follow these guidelines:
Keep the vehicle speed at
88 km/h (55 mph) or less for
the first 805 km (500 miles).
Do not drive at any one
constant speed, fast or
slow, for the first 805 km
(500 miles). Do not make
full-throttle starts. Avoid
downshifting to brake or
slow the vehicle.
Driving and Operating
Avoid making hard stops for
the first 322 km (200 miles) or
so. During this time the new
brake linings are not yet
broken in. Hard stops with
new linings can mean
premature wear and earlier
replacement. Follow this
breaking-in guideline every
time you get new brake
linings.
Do not tow a trailer during
break-in. See
for the trailer
towing capabilities of the
vehicle and more
information.
Following break in, engine speed
and load can be gradually
increased.
9-21