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Bulb Number
Center High Mounted
Stop Lamp (CHMSL) 921
Rear Cargo Lamp 921
Cab Roof Marker Lamps 194NA
Base Rear Tail/Turn and
Stop Lamp 3157K
Premium Rear Tail/Turn
and Stop Lamp LED (Serviced at Autho-
rized Dealer)
Premium Backup Lamp T20
Rear Lamp Bar ID
Marker Lamp 194
Side Marker Lamps
(Dual Rear Wheels) 194
Backup Lamp 921
Rear License Plate Lamp 194BULB REPLACEMENT
NOTE:Lens fogging can occur under certain atmo-
spheric conditions. This will usually clear as atmospheric
conditions change to allow the condensation to change
back into a vapor. Turning the lamps on will usually
accelerate the clearing process.
Base Quad / Premium Bi-Halogen: Low Beam
Headlamp, High Beam Headlamp, Front Park And
Turn – If Equipped
1. Open the hood.
2. Disconnect and isolate the negative battery cable.
3. Remove the four plastic push-in fasteners that secure the upper radiator seal to the grille support and both
fender ledges.
4. Remove the two plastic push-in rivets that secure the upper radiator seal to the radiator.7
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5. Remove the upper radiator seal from the vehicle.
6. Remove the two headlamp assembly attachmentscrews.
7. Reach into the front wheel house ahead of the front wheel, remove the fastener, and lift the cover over the access hole in the front of the wheel house splash
shield. Access to the rear of the lamp can be gained
through this access hole.
8. Reach through the access hole of the wheel house splash shield and lift the slide lock upward far enough
to disengage it from the lock post on the back of the
front lamp unit housing.
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9. Remove the headlamp assembly. Grasp the outboardedge of the lamp and pull it straight forward to
disengage the ball stud from the plastic grommet.
10. Disconnect the wiring harness connectors from the bulb socket.
11. Replace bulb(s) as necessary.
CAUTION!
• Do not contaminate the bulb glass by touching it
with your fingers or by allowing it to contact other
oily surfaces. Shortened bulb life will result.
• Always use the correct bulb size and type for
replacement. An incorrect bulb size or type may
overheat and cause damage to the lamp, the bulb
socket, or the lamp wiring. NOTE:
There are access covers over both headlamp bulb
access holes in the quad front lamp unit housing (if
equipped). These covers MUST be reinstalled after the
bulb has been replaced.
Fog Lamps – If Equipped
1. Reach under and behind the front bumper to access the back of the front fog lamp housing.
2. Disconnect the fog lamp wiring harness connector from the fog lamp bulb.
3. Rotate the bulb counterclockwise ¼ turn to unlock the bulb from the housing.
4. Pull the bulb straight out from the housing.
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CAUTION!
Do not contaminate the bulb glass by touching it
with your fingers or by allowing it to contact other
oily surfaces. Shortened bulb life will result.
Rear Tail/Stop, Turn Signal And Backup Lamps
1. Remove the two screws that pass through the bedsheetmetal.
2. Pull the outboard side of the lamp rearward farenough to unsnap the two receptacles on the outboard
side of the lamp housing from the two plastic snap
post retainers in the outer box side panel.
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3. Disconnect the wiring harness connectors from thebulb socket. 4. Rotate the bulb socket counterclockwise 1/4 turn to
unlock it from the housing.
5. Pull the bulb straight out of the socket.
CAUTION!
Do not contaminate the bulb glass by touching it
with your fingers or by allowing it to contact other
oily surfaces. Shortened bulb life will result.
6. Reverse the procedure to install the bulb and housing.
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Center High-Mounted Stoplamp (CHMSL) With
Cargo Lamp
1. Remove the two screws holding the housing/lens tothe body as shown.
2. Separate the connector holding the housing and wir- ing harness to the body. 3. Turn the desired bulb socket ¼ turn and remove the
socket and bulb from housing.
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4. Pull the desired bulb straight from the socket.
CAUTION!
Do not contaminate the bulb glass by touching it
with your fingers or by allowing it to contact other
oily surfaces. Shortened bulb life will result.•
Outside Bulbs: Cargo Lamps
• Inside Bulb: Center High-Mounted Stop Lamp
5. Reverse the procedure for installation of bulbs and housing.
Cab Top Clearance Lamps – If Equipped
1. Remove the two screws from the top of the lamp.
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2. Rotate the socket ¼ turn and pull it from the lampassembly.
3. Pull the bulb straight from it’s socket and replace.
Rear Lamp Bar ID Marker (Dual Rear Wheels) — If
Equipped
1. Loosen the two screws and the housing to gain access to the bulb sockets.
694 MAINTAINING YOUR VEHICLE