1999 CHEVROLET SILVERADO headlamp

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6-40 Front Turn Signal, Sidemarker and
Daytime Running Lamps
A. Sidemarker Lamp
B. Retainer Clip
C. Front Turn Signal Lamp
D. Daytime Running Lamp1. Remove the headlamp lens assembly as
mentioned previously.
2. Press the retainer clip, located behind the turn signal
housing, towards the outside of the vehicle.
3. Pull the turn signal housing out from the vehicle.
4. Press the locking release lever, turn the bulb socket
counterclockwise and remove it from the turn signal
lens housing.
5. Remove the bulb from the bulb socket.
6. Put the new bulb into the bulb socket.
7. Put the bulb socket into the turn signal housing and
turn it clockwise until it locks.
8. Put the turn signal housing back onto the vehicle
placing the hook and posts on the inner side into the
alignment holes first and then the outer side into the
retainer bracket until you hear a click.
9. Put the headlamp lens assembly back into
the vehicle.

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6-52
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load
-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make
you lose control. You could have a collision in
which you or others could be injured. Always
use the correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause an accident. If you have to replace a
wheel, use a new GM original equipment wheel.

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6-71
Name Usage
STUD #1 Accessory Power/Trailer Wiring
Feed
ABS Anti
-Lock Brakes
IGN A Ignition Switch
AIR A.I.R. System
RAP #1 Retained Accessory Power, Power
Mirrors, Power Door Locks,
Power Seat(s)
IGN B Ignition Switch
RAP #2 Not Used
STUD #2 Accessory Power/Trailer Wiring
Brake Feed
TRL R TRN Right Turn Signal Trailer Wiring
TRL L TRN Left Turn Signal Trailer Wiring
IGN 1 Ignition, Fuel Controls
INJ B Ignition, Fuel Controls (Relay)
STARTER Starter (Relay)
PARK LP Parking Lamps
FRT HVAC Climate Control System
STOP LP Exterior Lamps, Stoplamps
ECM 1 VCM/PCM
CHMSL Center High Mounted Stoplamp
VEH STOP Stoplamps, Cruise ControlName Usage
TRL B/U Backup Lamps Trailer Wiring
INJ A Fuel Controls, Ignition
RR HVAC Not Used
VEH B/U Vehicle Backup Lamps
ENG 1 Engine Controls, Canister Purge,
Fuel System
ETC Electronic Throttle Control
IGN E A/C Compressor Relay, Rear
Window Defogger, Daytime
Running Lamps, A.I.R. System
B/U LP Backup Lamps, BTSI
ATC Automatic Transfer Case
RR DEFOG Rear Window Defogger, Heated
Mirrors (Relay)
RR PRK Right Rear Parking Lamps
ECM B VCM/PCM
F/PMP Fuel Pump (Relay)
O2 A Oxygen Sensors
O2 B Oxygen Sensors
LR PRK Left Rear Parking Lamps
RR DEFOG Rear Window Defogger, Heated
Mirrors
HDLP Headlamps (Relay)

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6-72
Name Usage
TRL PRK Parking Lamps Trailer Wiring
RT HDLP Right Headlamps
DRL Daytime Running Lamps (Relay)
HTD MIR Heated Mirrors
LT HDLP Left Headlamps
A/C Air Conditioning
AUX PWR Cigarette Lighter, Auxiliary
Power Outlets
SEO 2 Special Equipment Option Power,
Power Seats, Aux Roof Mnt Lamp
SEO 1 Special Equipment Option Power,
Aux Roof Mnt Lamp, Cell Phone
DRL Daytime Running Lamps
A/C A/C (Relay)
FOG LP Fog Lamps
FOG LP Fog Lamps (Relay)
RADIO Audio System, Instrument Cluster,
Climate Control System
CIGAR Cigarette Lighter,
Auxiliary Power OutletsName Usage
RT TURN Right Turn Signals
BTSI Brake
-Transmission
Shift Interlock
LT TURN Left Turn Signals
FR PRK Front Parking Lamps,
Sidemarker Lamps
W/W PMP Windshield Washer Pump
HORN Horn (Relay)
IGN C Ignition Switch, Fuel Pump,
PRND321 Display, Crank
RDO AMP Not Used
HAZ LP Exterior Lamps, Hazard Lamps
EXP LPS Not Used
HORN Horn
CTSY LP Interior Lamps
RR WPR Not Used
TBC Body Control Module, Remote
Keyless Entry, Headlamps

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6-73
Replacement Bulbs*
Quantity Number
Low
-Beam Headlamps2 9006
High
-Beam Headlamps2 9005
Daytime Running
Lamps (DRL)2 3157KX
Front Marker Lamp 2 194
Front Parking and
Turn Lamp2 3157NA
Rear Marker Lamp,
Taillamp and Stop Lamp2 3157
Taillamp and
Stop Lamp**2 1157Quantity Number
Rear Turn Lamp 2 3157
Rear Turn Lamp ** 2 1156
Back
-up Lamp2 3157
Back
-up Lamp **2 1156
Center High
-Mounted
Stoplamp2 912
Cargo Lamp 2 912
* For replacement bulbs not listed here, please consult
your dealer.
** Chassis Cab Models

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9-5
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-8 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tank Capacity 6-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-65 . . . . . . . . . . . . . . . . . . . . . . .
Gages
Engine Coolant Temperature 2-75 . . . . . . . . . . . . . . . . . . . .
Engine Oil Pressure 2-79 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speedometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Temperature 2-75 . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garage Door Opener 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transmission 2-20 . . . . . . . . . . . . .
Gear Positions, Manual Transmission 2-24, 2-25 . . . . . . . . . .
Glove Box 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM Mobility Program for Persons with Disabilities 8-5 . . . . .
Gross Axle Weight Rating 4-46 . . . . . . . . . . . . . . . . . . . . . . . .
Gross Vehicle Weight Rating 4-46 . . . . . . . . . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Headlamps 2
-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-46 . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . .
Heated Front Seats 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Outside Rearview Mirrors 2-59, 3-6 . . . . . . . . . . . . . .
Heating 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Roads 4-38 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-8 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hour Meter Display 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Clutch Fluid 6-24, 7-25 . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Clutch System Check 7-20 . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Positions 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Lock Check 7-22 . . . . . . . . . . . . . . . . .
Illuminated Entry 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Day/Night Rearview Mirror 2-56 . . . . . . . . . . . . . . . . .
Inspections 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake System 7-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Axle 7-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling System 7-23 . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Systems 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .