Headlamp aiming, Bulb replacement, Taillamps, turn signal, sidemarker, and stoplamps – GMC 2012 Acadia User Manual
Page 333: Headlamp aiming -27 bulb replacement -27, Services, Aiming -27, Replacement -27 taillamps, turn signal, Sidemarker, and stoplamps -27

Black plate (27,1)
GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care
10-27
Headlamp Aiming
Headlamp aim has been preset at
the factory and should need no
further adjustment.
However, if your vehicle is damaged
in a crash, the headlamp aim may
be affected. Aim adjustment to the
low-beam headlamps may be
necessary if oncoming drivers flash
their high-beam headlamps at you
(for vertical aim).
If the headlamps need to be
re-aimed, it is recommended that
you take the vehicle to your dealer
for service.
Bulb Replacement
For the proper type of replacement
bulbs, see Replacement Bulbs on
page 10‑29.
For any bulb‐changing procedure
not listed in this section, contact
your dealer.
Taillamps, Turn Signal,
Sidemarker, and
Stoplamps
A. Sidemarker Lamp
B. Taillamp
To replace one of these bulbs:
1. Open the liftgate. See Liftgate
2. Remove the convenience net,
if the vehicle has one.
3. Remove the two taillamp nut
covers.