lock GMC SIERRA 1999 Manual Online

yellowblue
6-23 How to Add Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. See ªRecommended
Fluids and Lubricantsº in the Index.
Add fluid only after checking the transmission fluid
while it is hot. (A cold check is used only as a
reference.) If the fluid level is low, add only enough of
the proper fluid to bring the level up to the HOT area for
a hot check. It doesn't take much fluid, generally less
than one pint (0.5 L). Don't overfill.
NOTICE:
We recommend you use only fluid labeled
DEXRON-III, because fluid with that label is
made especially for your automatic transmission.
Damage caused by fluid other than DEXRON
-III
is not covered by your new vehicle warranty.

After adding fluid, recheck the fluid level as
described under ªHow to Check.º

When the correct fluid level is obtained, push the
dipstick back in all the way; then flip the handle
down to lock the dipstick in place.
Manual Transmission Fluid
When to Check
A good time to have it checked is when the engine oil
is changed. However, the fluid in your manual
transmission doesn't require changing.
How to Check
Because this operation can be a little difficult, you may
choose to have this done at your GM dealership
Service Department.
If you do it yourself, be sure to follow all the
instructions here, or you could get a false reading.
NOTICE:
Too much or too little fluid can damage your
transmission. Too much can mean that some of
the fluid could come out and fall on hot engine
parts or exhaust system parts, starting a fire. Be
sure to get an accurate reading if you check your
transmission fluid.

yellowblue
6-41
4. Turn the bulb
counterclockwise
and remove it.
5. Put the new bulb into the assembly and turn it
clockwise until it is tight.
6. Plug in the electrical connector.
7. Put the headlamp lens assembly back into the
vehicle. Install and tighten the two hex head pins.Front Turn Signal Lamps
(Sealed Beam Headlamps)
1. Remove the two screws
at the inside edge of
the parking/turn signal
lamp assembly.
2. Remove the lamp assembly by swinging it out from
the inside edge and sliding it out at the outside edge.
3. Squeeze the tab on the side of the lamp socket while
turning the socket counterclockwise.

yellowblue
6-42
4. Pull the socket out of the
lamp assembly.
5. Push in gently on
the bulb, turn it
counterclockwise
and remove it from
the socket.
6. Put the new bulb into the socket, gently press in on
the bulb and turn it clockwise until it is tight.
7. Put the socket back into the lamp assembly and turn
it clockwise until it locks.
8. Put the parking/turn signal lamp assembly back into
the vehicle and tighten the screws.Front Turn Signal Lamps
(Composite Headlamps)
1. Remove the four screws
and take out the
parking/turn signal
lamp assembly.
2. Squeeze the tab on the side of the lamp socket while
turning the socket counterclockwise.

yellowblue
6-43
3. Pull the socket out of
the lamp assembly.
4. Push in gently on the bulb, turn it counterclockwise
and remove it from the socket.
5. Put the new bulb into the socket, gently press in on
the bulb and turn it clockwise until it is tight.
6. Put the socket back into the lamp assembly and turn
it clockwise until it locks.
7. Put the parking/turn signal lamp assembly back into
the vehicle and tighten the four screws.Front Sidemarker Lamps
(Composite Headlamps)
1. Remove the four screws
and pull out the
parking/turn signal
lamp assembly.
2. Reach through the opening and turn the sidemarker
bulb socket counterclockwise and remove it.

yellowblue
6-44
3. Pull the bulb straight out
of the socket.
4. Put a new bulb into the socket and push it in until it
is tight.
5. Put the socket back into the sidemarker assembly
and turn it clockwise to tighten it.
6. Replace the parking/turn signal lamp assembly and
tighten the screws.Fender Marker Lamps
(Dual Rear Wheel Pickup Models)
1. Remove the screws and
take the fender marker
assembly out of
the fender.

yellowblue
6-45
2. Turn the bulb socket
counterclockwise and
remove it from the
lens assembly.
3. Pull the bulb straight out of the socket.
4. Put a new bulb into the socket and push it in until it
is tight.
5. Put the socket back into the lens assembly and turn it
clockwise to tighten it.
6. Replace the lens and tighten the screws.Center High-Mounted Stoplamp (CHMSL)
1. Remove the screws and
lift off the lens.
2. Pull the old bulb straight out of the socket.

yellowblue
6-48
5. Put in a new bulb and push it straight in until it
is tight.
6. Replace the bulb retainer.
7. Replace the rear lamp assembly and tighten
the screws.
8. Close the tailgate.
Taillamps (Chassis Cab Models)
1. Using your hands, peel the rubber seal away from
the lens.
2. Lift the lens off the
lamp assembly.
3. Slide the socket out of the lamp assembly.
4. Push in gently on
the bulb, turn it
counterclockwise
and remove it from
the socket.
5. Put in a new bulb and, pushing in gently, turn it
clockwise until it is tight.
6. Put the socket back in the lamp assembly and replace
the lens and lens seal.

yellowblue
6-71
Instrument Panel Fuse Block
The fuse block access door
is on the driver's side edge
of the instrument panel. Pull
off the cover to access the
fuse block.
You can remove fuses with a fuse extractor. The fuse
extractor is mounted to the fuse block access door. To
remove fuses if you don't have a fuse extractor, hold the
end of the fuse between your thumb and index finger
and pull straight out.
You may have spare fuses located behind the fuse block
access door. These can be used to replace a bad fuse.
However, make sure it is of the correct amperage.
Fuse/Circuit
Breaker Usage
1 Stop/TCC Switch, Buzzer,
CHMSL, Hazard Lamps,
Stoplamps
2 Transfer Case

yellowblue
6-72
Fuse/Circuit
Breaker Usage
3 Courtesy Lamps, Cargo Lamp,
Glove Box Lamp, Dome/Reading
Lamps, Vanity Mirrors,
Power Mirrors
4 Instrument Cluster, DRL Relay,
Lamp Switch, Keyless Entry,
Low Coolant Module, Illuminated
Entry Module,
DRAC (Diesel Engine)
5 Not Used
6 Cruise Control
7 Auxiliary Power Outlet
8 Crank
9 License Lamp, Parking Lamps,
Taillamps, Roof Marker Lamps,
Tailgate Lamps, Front
Sidemarkers, Fog Lamp Relay,
Door Switch Illumination,
Fender Lamps, Headlamp
Switch IlluminationFuse/Circuit
Breaker Usage
10 Not Used
11 Wiper Motor, Washer Pump
12 A/C, A/C Blower,
High Blower Relay
13 Power Amp, Cigarette Lighter,
Door Lock Relay,
Power Lumbar Seat
14 4WD Indicator, Cluster, Comfort
Controls, Instrument Switches,
Radio Illumination,
Chime Module
15 DRL Relay, Fog Lamp Relay
16 Front and Rear Turn Signals,
Back
-Up Lamps, BTSI Solenoid
17 Radio (Ignition)
18 4WAL/VCM, ABS,
Cruise Control
19 Radio (Battery)

yellowblue
6-73
Fuse/Circuit
Breaker Usage
20 PRNDL, Automatic Transmission,
Speedometer, Check Gages
Warning Light
21 Security/Steering
22 Not Used
23 Not Used
24 Front Axle, 4WD Indicator Lamp,
TP2 Relay (Gasoline Engine)
A Power Door Lock, Six
-Way Power
Seat, Keyless Entry Module
B Power WindowsUnderhood Fuse/Relay Center
The underhood fuse/relay center is located in the rear of
the engine compartment near the brake fluid reservoir.
Move the retainer clips for the cover to access the
fuse block.
You can remove fuses with a fuse extractor. The fuse
extractor is mounted to the interior fuse block. To
remove fuses if you don't have a fuse extractor, hold the
end of the fuse between your thumb and index finger
and pull straight out.