Headlamp Aiming; Front Headlamp Aiming; Wheels And Tires; Tires - GMC Sierra 2023 Manual

116 Vehicle Care
3. Turn the ignition on.
For vehicles not equipped with the Stop/
Start system:
1. Install the negative battery cable clamp
to the negative battery post.
2. Tighten the negative battery cable nut.
3. Turn the ignition on.

Headlamp Aiming

Front Headlamp Aiming

Headlamp aim has been preset and should
need no further adjustment.
If the vehicle is damaged in a crash, the
headlamp aim may be affected.
If adjustment to the headlamps is necessary,
see your dealer.

Wheels and Tires

Tires

Every new GM vehicle has high-quality
tires made by a leading tire
manufacturer. See the warranty manual
for information regarding the tire
warranty and where to get service. For
additional information refer to the tire
manufacturer.
Warning
Poorly maintained and improperly
used tires are dangerous.
Overloading the tires can cause
overheating as a result of too
much flexing. There could be a
blowout and a serious crash. See
Vehicle Load Limits 0 75.
Underinflated tires pose the same
danger as overloaded tires. The
resulting crash could cause serious
injury. Check all tires frequently to
maintain the recommended
pressure. Tire pressure should be
checked when the tires are cold.
Overinflated tires are more likely
to be cut, punctured, or broken by
a sudden impact such as when
hitting a pothole. Keep tires at the
recommended pressure.
Warning (Continued)
Worn or old tires can cause a
crash. If the tread is badly worn,
replace them.
Replace any tires that have been
damaged by impacts with
potholes, curbs, etc.
Improperly repaired tires can cause
a crash. Only your dealer or an
authorized tire service center
should repair, replace, dismount,
and mount the tires.
Do not spin the tires in excess of
56 km/h (35 mph) on slippery
surfaces such as snow, mud, ice,
etc. Excessive spinning may cause
the tires to explode.

Tire Sidewall Labeling

Useful information about a tire is
molded into its sidewall. The examples
show a typical passenger vehicle tire/
full size spare tire, and light truck tire
(Continued)
sidewall.