2007 GMC SIERRA bulb

Noise Control System
........................... 542
Bulb Replacement
................................ 543
Windshield Wiper Blade
Replacement
..................................... 549
Tires
..................................................... 550
Appearance Care
.................................. 597
Vehicle Identication
............................. 607
Electrical System
.................................. 608
Capacities and Specications
................ 616Maintenance Schedule
.............................. 619
Maintenance Schedule
.......................... 620
Customer Assistance Information
............. 643
Customer Assistance and
Information
........................................ 644
Reporting Safety Defects
...................... 662
Index
.......................................................... 665
2

Turn and Lane-Change Signals
The turn signal has two upward (for right) and
two downward (for left) positions. These positions
allow you to signal a turn or a lane change.
To signal a turn, move the lever all the way up or
down. When the turn is nished, the lever will
return automatically.
To signal a lane change, raise or lower the lever for
less than one second until the arrow starts to ash.
This will cause the turn signals to automatically
ash three times. It will ash six times if tow-haul
mode is active. Holding the turn signal lever for
more than one second will cause the turn signals to
ash until you release the lever. The lever will
return by itself when it is released.An arrow on the
instrument panel cluster
will ash in the
direction of the turn or
lane change.
As you signal a turn or a lane change, if the
arrows ash more quickly than normal, a signal
bulb may be burned out and other drivers will not
see your turn signal.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows do not go on at all when you
signal a turn, check for burned-out bulbs and a
blown fuse. SeeFuses and Circuit Breakers on
page 608.
213

Turn Signals When Towing a Trailer
The arrows on your instrument panel will
ash whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also
ash, telling other drivers you’re about to
turn, change lanes or stop.
When towing a trailer, the arrows on your
instrument panel will ash for turns even if the
bulbs on the trailer are burned out. Thus, you may
think drivers behind you are seeing your signal
when they are not. It’s important to check
occasionally to be sure the trailer bulbs are still
working.
Driving On Grades
Reduce speed and shift to a lower gearbefore
you start down a long or steep downgrade. If you
don’t shift down, you might have to use your
brakes so much that they would get hot and no
longer work well.You can tow in DRIVE (D). You may want to shift
the transmission to lower gear selection if the
transmission shifts too often (e.g., under heavy
loads and/or hilly conditions).
You may also want to activate the tow/haul mode
if the transmission shifts too often. SeeTow/Haul
Mode Light on page 266.
When towing at high elevation on steep uphill
grades, consider the following: Engine coolant at
higher elevations will boil at a lower temperature
than at or near sea level. If you turn your
engine off immediately after towing at high
elevation on steep uphill grades, your vehicle may
show signs similar to engine overheating. To
avoid this, let the engine run while parked,
preferably on level ground, with the transmission
in PARK (P) at least ve minutes before turning the
engine off. If you do get the overheat warning,
seeEngine Overheating on page 516.
475

Bulb Replacement....................................... 543
Halogen Bulbs........................................... 544
Headlamps................................................ 544
Center High-Mounted Stoplamp (CHMSL)
and Cargo Lamp.................................... 545
Pickup Box Identication and Fender
Marker Lamps........................................ 546
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps...................................... 546
License Plate Lamp................................... 548
Replacement Bulbs................................... 549
Windshield Wiper Blade Replacement....... 549
Tires............................................................ 550
Tire Sidewall Labeling............................... 551
Tire Terminology and Denitions............... 556
Ination - Tire Pressure............................. 559
Dual Tire Operation................................... 560
Tire Pressure Monitor System................... 561
Tire Inspection and Rotation...................... 565
When It Is Time for New Tires.................. 568Buying New Tires...................................... 568
Different Size Tires and Wheels................ 570
Uniform Tire Quality Grading..................... 571
Wheel Alignment and Tire Balance............ 572
Wheel Replacement.................................. 573
Tire Chains............................................... 574
If a Tire Goes Flat.................................... 576
Changing a Flat Tire................................. 576
Removing the Spare Tire and Tools.......... 578
Removing the Flat Tire and Installing
the Spare Tire....................................... 582
Secondary Latch System........................... 589
Storing a Flat or Spare Tire and Tools...... 592
Spare Tire................................................. 596
Appearance Care........................................ 597
Cleaning the Inside of Your Vehicle.......... 597
Fabric/Carpet............................................. 599
Leather...................................................... 600
Instrument Panel, Vinyl, and Other
Plastic Surfaces..................................... 600
Section 5 Service and Appearance Care
484

Federal law prohibits the following acts or the
causing thereof:
1. The removal or rendering inoperative by any
person, other than for purposes of
maintenance, repair or replacement, of any
device or element of design incorporated into
any new vehicle for the purpose of noise
control, prior to its sale or delivery to
the ultimate purchaser or while it is in use; or
2. The use of the vehicle after such device or
element of design has been removed or
rendered inoperative by any person.
Among those acts presumed to constitute
tampering are the acts listed below.
Insulation:

Removal of the noise shields or any
underhood insulation.
Engine:

Removal or rendering engine speed governor,
if the vehicle has one, inoperative so as to
allow engine speed to exceed manufacturer
specications.
Fan and Drive:

Removal of fan clutch, if the vehicle has one,
or rendering clutch inoperative.
Removal of the fan shroud, if the vehicle
has one.
Air Intake:

Removal of the air cleaner silencer.
Modication of the air cleaner.
Exhaust:

Removal of the muffler and/or resonator.
Removal of the exhaust pipes and exhaust
pipe clamps.
Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 549.
For any bulb changing procedure not listed in this
section, contact your dealer.
543

Halogen Bulbs
{CAUTION:
Halogen bulbs have pressurized gas
inside and can burst if you drop or
scratch the bulb. You or others could be
injured. Be sure to read and follow the
instructions on the bulb package.
Headlamps
To replace one of these bulbs, do the following:
1. Open the hood. SeeHood Release on
page 497for more information.
2. If you are replacing the bulb on the passenger
side remove the Engine Air Cleaner cover.
SeeEngine Air Cleaner/Filter (Gasoline
Engines) on page 505for more information.
3. Reach in and access the bulb sockets from
inside the engine compartment.4. Turn the bulb socket counterclockwise to
remove it from the headlamp assembly
and pull it straight out.
5. Unplug the electrical connector from the old
bulb by releasing the clips on the bulb socket.
6. Replace it with a new bulb socket.
7. Plug in the electrical connector to the new
bulb socket.
8. Reinstall the new bulb socket into the
headlamp assembly and turn it clockwise
to secure.
9. Close the hood.
544

Center High-Mounted Stoplamp
(CHMSL) and Cargo Lamp
To replace one of these bulbs, do the following:
1. Remove the screws and lift off the lamp
assembly.A. Cargo Lamp
B. Center High-Mounted Stoplamp Bulb
2. Remove the CHMSL and Cargo bulbs by
turning socket counterclockwise and pulling
the bulb straight out.
3. Install the CHMSL and Cargo bulbs by
pushing the bulb straight in and turning
clockwise.
4. Reinstall the lamp assembly and tighten the
screws.
545

Pickup Box Identication and
Fender Marker Lamps
To replace a pickup box identication or fender
marker lamp bulb, do the following:
1. Press the tab from the back to remove
the lamp.
2. Unplug the lamp assembly harness.
3. Gently pry the individual lamp from the lamp
assembly.
4. Unplug the lamp.
5. Plug in a new lamp and snap it into the
assembly.
6. Reinstall the lamp assembly.
Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
To replace one of these bulbs, do the following:
1. Open the tailgate.Tailgate on page 122
for more information.
2. Remove the two
rear lamp assembly
screws near the
tailgate latch
strikerpost and pull
out the lamp
assembly.
3. Determine which of the following taillamp
assemblies applies to your vehicle.
546