clock GMC SIERRA CLASSIC 2007 User Guide

When replacing the fuel cap, turn it clockwise until it
clicks. It will require more effort to turn the fuel cap
on the last turn as you tighten it. Make sure the
cap is fully installed. The diagnostic system can
determine if the fuel cap has been left off or
improperly installed. This would allow fuel to
evaporate into the atmosphere. SeeMalfunction
Indicator Lamp on page 258.
The TIGHTEN FUEL CAP message will be
displayed on the Driver Information Center (DIC) if
the fuel cap is not properly installed. SeeDIC
Warnings and Messages on page 270for more
information.
{CAUTION:
If a re starts while you are refueling, do
not remove the nozzle. Shut off the ow
of fuel by shutting off the pump or by
notifying the station attendant. Leave the
area immediately.
Notice:If you need a new fuel cap, be sure to
get the right type. Your dealer can get one
for you. If you get the wrong type, it may not
t properly. This may cause your malfunction
indicator lamp to light and may damage
your fuel tank and emissions system. See
Malfunction Indicator Lamp on page 258.
476

{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can
boil before the proper coolant mixture will.
Your vehicle’s coolant warning system is
set for the proper coolant mixture. With
plain water or the wrong mixture, your
engine could get too hot but you would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and a proper coolant.
Notice:In cold weather, water can freeze and
crack the engine, radiator, heater core and
other parts. Use the recommended coolant and
the proper coolant mixture.
{CAUTION:
You can be burned if you spill coolant
on hot engine parts. Coolant contains
ethylene glycol and it will burn if the
engine parts are hot enough. Do not spill
coolant on a hot engine.
1. You can remove the
coolant surge tank
pressure cap when
the cooling system,
including the coolant
surge tank pressure
cap and upper
radiator hose, is no
longer hot.
Turn the pressure cap slowly counterclockwise
about one full turn. If you hear a hiss, wait
for that to stop. A hiss means there is
still some pressure left.
512

Headlamps
To replace a headlamp bulb, do the following:
1. Open the hood. SeeHood Release on
page 479for more information.
2. Remove the two pins on the top of the
headlamp assembly. To remove the pins, turn
the outer pin outward and pull it straight up.
To remove the inner pin, turn it in and
pull it straight up.A. Low-Beam Headlamp
B. High-Beam Headlamp
3. Pull the headlamp assembly out.
4. Unplug the electrical connector.
5. Turn the old bulb counterclockwise and
remove it from the headlamp assembly.
6. Install the new bulb into the assembly and
turn it clockwise until it is tight.
7. Plug in the electrical connector.
8. Reinstall the headlamp assembly.
9. Reinstall and tighten the two pins.
533

5. Press the locking release lever, turn the bulb
socket counterclockwise and remove it from
the turn signal assembly.
6. Remove the old bulb from the bulb socket.
7. Install a new bulb into the bulb socket.
8. Insert the bulb socket into the turn signal
assembly and turn it clockwise until it locks.
9. Reinstall the turn signal assembly back into
the vehicle placing the hook and posts on
the inner side into the alignment holes
rst, then the outer side into the retainer
bracket until you hear a click.
10. Reinstall the headlamp assembly.Roof Marker Lamps
To replace a roof marker lamp bulb, do the
following:
1. Remove the
two screws and
lift off the lens.
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2. Install a new bulb
into the socket and
turn it clockwise
until it locks
into place.
3. Reinstall the lens and tighten the screws.To replace a center roof marker lamp bulb, do the
following:
1. Remove the six screws from the center roof
marker lamp assembly.
2. Turn the old bulb counterclockwise to remove
it from the socket.
3. Reinstall the lens and tighten the screws.
536

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 back plate from the assembly by
pressing the release tabs.
3. Remove the CHMSL bulb by pulling the bulb
straight out from the holder back plate.
Remove a cargo bulb by turning the socket
counterclockwise and pulling the bulb
straight out.
537

4. If a CHMSL bulb is replaced, put the new bulb
into the socket and press it in until it is tight.
If a cargo lamp is replaced, put a new
cargo lamp bulb into the socket and press
it in until it is tight before turning the socket
counterclockwise.
5. Reinstall the back plate into the lamp
assembly.
6. Reinstall the lamp assembly and tighten
the screws.Pickup Box Identication and
Fender Marker Lamps
To replace a pickup box identication or fender
marker lamp bulb, do the following:
1. Remove the screws and lamp assembly.
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.
538

Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
To replace one of these bulbs, do the following:
1. Open the tailgate.Tailgate on page 127
for more information.
2. Remove the two
rear lamp assembly
screws near the
tailgate latch
and pull out the
lamp assembly.
3. Determine which of the following taillamp
assembly applies to your vehicle.4. Press the release tab, if the vehicle has one,
and turn the bulb socket counterclockwise to
remove it from the taillamp assembly.
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.
A. Stoplamp/Taillamp
B. Turn Signal
C. Back-up Lamp
539

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.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 3157
Back-up Lamp* 1156
Cargo Lamp and Center
High-Mounted Stoplamp (CHMSL)912
Daytime Running Lamp (DRL) 4114K
Fender Marker, Front Roof Marker,
and Sidemarker Lamp (If Equipped)194
Front Parking and Turn Lamp 3457A
Headlamps
High-Beam 9005
Low-Beam 9006
License Plate Lamp 168
Rear Marker Lamp, Taillamp and
Stoplamp*3157
Rear Turn Signal Lamp 3157
Rear Turn Signal Lamp* 1156
Stoplamp and Taillamp* 1157
* Chassis Cab Models
For replacement bulbs not listed here, contact
your dealer.
541

For regular cab models, the equipment you will
need is behind the passenger’s seat. For extended
and crew cab models, the equipment is on the shelf
behind the passenger’s side second row seat.
1. If there is a cover, move the seats forward
and turn the wing nut on the cover
counterclockwise to remove it. For crew cab
models, pull up the second row seat with
the loop at the base of the seat cushion to
access the tools.
2. Turn the knob on the jack counterclockwise to
lower the jack head to release the jack from
its holder.
3. Remove the wheel blocks and the wheel
block retainer by turning the wing nut
counterclockwise.
4. Remove the wing nut used to retain the
storage bag and tools by turning it
counterclockwise.
You will use the jack handle extensions and the
wheel wrench to remove the underbody-mounted
spare tire.A. Spare Tire (Valve
Stem Pointed Down)
B. Hoist Assembly
C. Hoist Cable
D. Tire/Wheel Retainer
E. Hoist Shaft
F. Hoist End of
Extension ToolG. Hoist Shaft
Access Hole
H. Wheel Wrench
I. Jack Handle
Extensions
J. Spare Tire Lock
(If Equipped)
568