Starting And Operating; New Vehicle Break-In - GMC Yukon XL 2015 Owner's Manual

There is also important loading
information for off-road driving in
this manual. See Loading Your
Vehicle for Off-Road Driving
under Off-Road Driving on
page 9-5.
Starting and
Operating

New Vehicle Break-In

Caution
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 mi).
Do not drive at any one
constant speed, fast or slow,
for the first 805 km (500 mi).
Do not make full-throttle
starts. Avoid downshifting to
brake or slow the vehicle.
Avoid making hard stops for
the first 322 km (200 mi) or
so. During this time the new
brake linings are not yet
Driving and Operating
Caution (Continued)
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 Trailer Towing
on page 9-77 for the trailer
towing capabilities of the
vehicle and more information.
Following break-in, engine speed
and load can be gradually
increased.
(Continued)
9-19