2003 Chevrolet Impala Owner's Manual - Page 307
2003 Chevrolet Impala Manual
Page 307 highlights
Headlamp Aiming If your vehicle is damaged in an accident, the headlamp aim may be affected. Aim adjustment to the low beam may be necessary if it is difficult to see lane markers (for horizontal aim), or if oncoming drivers flash their high beams at you (for vertical aim). If you believe your headlamps need to be re-aimed, we recommend that you take your vehicle to the dealer for service. However, it is possible for you to re-aim your headlamps by following the procedure in the service manual for your vehicle. Notice: To make sure your headlamps are aimed properly, read all the instructions before beginning. Failure to follow these instructions could cause damage to headlamp parts. 5-54
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Headlamp
Aiming
If your vehicle is damaged in an accident, the headlamp
aim
may
be affected. Aim adjustment to the low beam
may be necessary
if
it is difficult to see lane markers (for
horizontal aim), or
if
oncoming drivers flash their high
beams at you (for vertical aim).
If
you believe your
headlamps need to
be re-aimed, we
recommend that
you take your vehicle to the dealer for service. However,
it
is possible for
you to re-aim your headlamps by
following the procedure in the service manual
for your
vehicle.
Notice:
To
make
sure
your
headlamps
are
aimed
properly, read all the instructions
before
beginning.
Failure to follow these
instructions
could
cause
damage
to
headlamp parts.
5-54