GMC Yukon XL Denali Owner's Manual page 387

WARNING
Getting under a vehicle when it is
lifted on a jack is dangerous.
If the vehicle slips off the jack,
you could be badly injured or
killed. Never get under a vehicle
when it is supported only by
a jack.
WARNING
Raising the vehicle with the jack
improperly positioned can
damage the vehicle and even
make the vehicle fall. To help
avoid personal injury and vehicle
damage, be sure to fit the jack lift
head into the proper location
before raising the vehicle.
4. Position the jack under the
vehicle as shown.
Front Position
Front Tire Flat: If the flat tire is
on a front tire of the vehicle, you
will need to use the jack handle
and only one jack handle
extension. Attach the wheel
wrench to the jack handle
extension. Attach the jack
handle to the jack (A). Position
the jack on the frame behind the
flat tire where the frame sections
overlap. Turn the wheel wrench
clockwise to raise the vehicle.
Vehicle Care
Raise the vehicle far enough off
the ground so there is enough
room for the spare tire to clear
the ground.
Rear Position
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