turn signal bulb GMC SIERRA 2007 Owner's Manual

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

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

A. Stoplamp/Taillamp/Turn Signal Lamp
B. Back-up Lamp
C. Stoplamp/Taillamp/Turn Signal Lamp
4. Press the tab, if the vehicle has one, and turn
the bulb socket counterclockwise to remove it
from the taillamp assembly.A. Stoplamp/Taillamp/Turn Signal Lamp
B. Stoplamp/Taillamp/Turn Signal Lamp
C. Back-up Lamp
D. Sidemarker Lamp
5. Pull the old bulb straight out from the socket.
6. Press a new bulb into the socket and turn
the socket clockwise into the taillamp
assembly.
7. Reinstall the taillamp assembly.
Dually ModelsAll Other Models
547

Taillamps (Chassis Cab Models)
A. Backup Lamp
B. Stoplamp/Taillamp/Turn Signal Lamp
To replace one of these bulbs, do the following:
1. Remove the four screws.
2. Lift the lens off the lamp assembly.
3. Turn the old bulb counterclockwise and pull
the it straight out from the socket.
4. Install a new bulb into the socket, turn it
clockwise, and press it in until it is tight.
5. Reinstall the lens and the four screws.
License Plate Lamp
To replace one of these bulbs, do the following:
1. Reach under the rear bumper for the bulb
socket.
2. Turn the bulb socket counterclockwise and
pull the bulb socket out of the connector.
3. Pull the old bulb from the bulb socket, keeping
the bulb straight as you pull it out.
4. Install the new bulb.
5. Reverse Steps 1 through 3 to reinstall the
bulb socket.
548

Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 3047
Back-up Lamp* 1156
Cargo Lamp and Center
High-Mounted Stoplamp (CHMSL)912
Daytime Running Lamps (DRL) 4114K
Fender Marker and Front Roof
MarkerW5WLL
Front Parking and Turn Lamp 3457A
License Plate Lamp 168
Rear Marker Lamp, Taillamp and
Stoplamp*3047
Rear Turn Signal Lamp 3047
Sidemarker Lamp 194
Stoplamp/Turn Signal Lam/Taillamp* 1157
* Chassis Cab Models
For replacement bulbs not listed here, contact
your dealer/retailer.
Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for
wear or cracking. SeeScheduled Maintenance
(Gasoline Engine) on page 623.
Replacement blades come in different types and
are removed in different ways. To replace the
wiper blade assembly, do the following:
1. Pull the windshield wiper arm connector away
from the windshield.
2. Squeeze the grooved areas on each side of
the blade, and rotate the blade assembly
away from the arm connector.
549

Appearance Care (cont.)
Washing Your Vehicle.............................. 601
Weatherstrips........................................... 601
Windshield and Wiper Blades................... 603
Ashtray....................................................... 233
Audio System.............................................. 300
AM-FM Radio.......................................... 304
Audio Steering Wheel Controls................. 368
Care of Your CD and DVD Player............ 371
Care of Your CDs and DVDs................... 370
Fixed Mast Antenna................................. 371
Navigation/Radio System, see Navigation
Manual................................................. 355
Radio with CD................................306, 312
Rear Seat Audio (RSA)............................ 366
Setting the Time...................................... 301
Theft-Deterrent Feature............................ 368
Understanding Radio Reception............... 369
XM™ Satellite Radio Antenna System...... 371
Audio System(s)
Radio with CD and DVD.......................... 322
Automatic Headlamp System....................... 223
Automatic Transmission
Fluid........................................................ 508
Operation................................................. 138
Auxiliary Roof Mounted Lamp Switch.......... 225B
Battery........................................................ 531
Electric Power Management..................... 227
Run-Down Protection............................... 228
Before Leaving on a Long Trip.................... 414
Brake
Emergencies............................................ 381
Parking.................................................... 162
Brakes........................................................ 528
System Warning Light.............................. 256
Braking....................................................... 378
Braking in Emergencies............................... 381
Break-In, New Vehicle................................. 132
Bulb Replacement....................................... 543
Center High-Mounted Stoplamp (CHMSL)
and Cargo Lamp.................................. 545
Halogen Bulbs......................................... 544
Headlamps............................................... 544
License Plate Lamps................................ 548
Pickup Box Identication and Fender
Marker Lamps...................................... 546
Replacement Bulbs.................................. 549
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps..................................... 546
Buying New Tires........................................ 568
666