key GMC SIERRA 1999 Owner's Guide

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.

yellowblue
7-43
Hydraulic Clutch System Check
Check the fluid level in the clutch reservoir. See
ªHydraulic Clutch Fluidº in the Index. A fluid loss in
this system could indicate a problem. Have the system
inspected and repaired at once.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part D.
Body Lubrication Service
Lubricate all fuel doors, body hood and body door
hinges, tailgate and tailgate handle pivot points, latches,
locks and folding seat hardware. Part D tells you what to
use. More frequent lubrication may be required when
exposed to a corrosive environment.Starter Switch Check
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake (see ªParking
Brakeº in the Index if necessary) and the regular
brake.
NOTE: Do not use the accelerator pedal, and be
ready to turn off the engine immediately if it starts.
3. On automatic transmission vehicles, try to start the
engine in each gear. The starter should work only in
PARK (P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service.
On manual transmission vehicles, put the shift lever
in NEUTRAL (N), push the clutch down halfway
and try to start the engine. The starter should work
only when the clutch is pushed down all the way to
the floor. If the starter works when the clutch isn't
pushed all the way down, your vehicle needs service.

yellowblue
7-44
Brake-Transmission Shift Interlock (BTSI) Check
(Automatic Transmission)
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake (see ªParking Brakeº
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, but don't start the engine. Without applying
the regular brake, try to move the shift lever out of
PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle's BTSI
needs service.Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.

With an automatic transmission, the key should turn
to LOCK only when the shift lever is in PARK (P).

With a manual transmission, the key should turn to
LOCK only when you press the key release button.
On all vehicles, the key should come out only in LOCK.

yellowblue
7-49
USAGEFLUID/LUBRICANT
Manual
Transmission
(5
-Speed without
Low Gear, RPO
MG5)
Synchromesh Transmission Fluid
(GM Part No. 12345349
or equivalent).
Automatic
TransmissionDEXRON
-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Floor Shift
LinkageLubriplate
Lubricant Aerosol
(GM Part No. 12346293 or
equivalent) or lubricant meeting
requirements of NLGI # 2
Category LB or GC
-LB.
Chassis
LubricationChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements of
NLGI # 2, Category LB or
GC
-LB.
USAGEFLUID/LUBRICANT
Front Wheel
BearingsWheel Bearing Lubricant meeting
requirements of NLGI # 2,
Category GC or GC
-LB (GM Part
No. 1051344 or equivalent).
Front and Rear
Axle (Standard
Differential)SAE 80W-90 Axle Lubricant
(GM Part No. 1052271
or equivalent).
Rear Axle
(Locking
Differential)SAE 80W-90 Axle Lubricant; use
only GM Part No. 1052271. Do
not add friction modifier.
Differential, C3
(HD3500)
Trucks With
Dana Rear AxleSAE 75W-140 Synthetic Axle
Lubricant (GM Part
No. 12346140) or equivalent.
Transfer CaseDEXRON
-III Automatic
Transmission Fluid.
Automatic
Transfer CaseAutomatic Transfer Case Fluid
(GM Part No. 12378396).

yellowblue
8-6
Roadside Assistance
GMC's Roadside Assistance provides stranded owners
with over
-the-phone roadside repairs, location of the
nearest GMC dealer or the following special services:
Flat Tire Change: Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement of tire).Fuel Delivery: Delivery of enough fuel for the customer
to get to the nearest service station (up to $4.00) will
be covered.
Jump Start: No
-start situations which require a battery
jump start will be covered at no charge.
Lock Out: Replacement keys or locksmith service will
be covered at no charge if you are unable to gain entry
into your vehicle. Delivery of the replacement key will
be covered at no charge within 10 miles (16 km).
Emergency Towing Service: Towing to the nearest
GMC dealer for warranty related disablements will
be covered.
Deluxe Trip Routing: Custom
-made, computerized
highlighted maps using the most direct or scenic route
are provided free of charge. Maps include points of
interest and a list of GMC dealers along the route. Also
included is a list of hotels along the route that are
discounted through affiliation with ªQuest
International.º Trip Routing is available through
Roadside Assistance by calling 1
-800-GMC-8782
(462-8782). Please be prepared to provide your Vehicle
Identification Number (VIN). Allow five working days
for fulfillment.

9-yellowblue
9-1
Section 9 Index
A
ccessory Power Outlet 2-59 . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment to the Outside of Your Vehicle 6-3 . . . . . .
Air Bag 1-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment 1-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-28 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Light 2-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Switch 1-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-25, 2-65 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-28 . . . . . . . . . . . . . . .
When Should it Inflate 1-27 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner 6-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter Restriction Indicator Check 7-42 . . . . . . . .
Air Conditioning 3-3, 3-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-78 . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-58 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-66 . . . . . . . . . . . . . . . . . . . . . .
Antenna 3-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-28, 6-76, 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock
Brake System Warning Light 2-68, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appearance Care 6
-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Materials, GM Vehicle Care/ 6-68 . . . . . . . . . . . .
Arbitration Program 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Armrest Storage Compartment 2-56 . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Equipment, Adding 3-25 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transmission
Check 7
-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-20, 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-45 . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Front 6-27, 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Locking Rear 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Rear 6-25, 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Keyless Entry 2-8 . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Better Business Bureau Mediation 8-4 . . . . . . . . . . . . . . . . . . .
Blizzard, Driving In 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

yellowblue
9-6
Jack, Tire 5-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-43 . . . . . . . . . . . . . . . . . . . . .
Key Release Button 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry System 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-69 . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-69 . . . . . . . . . . . . . . . . . . .
Lamps 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cargo 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-28 . . . . . . .
Lighter 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Bag Off 2
-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag Readiness 1-25, 2-65 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-69, 4-7 . . . . . . . . . . . .
Brake System Warning 2-68 . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Check Gages 2
-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps Indicator 2-74 . . . . . . . . . . . . . . .
Safety Belt Reminder 1-9, 2-64 . . . . . . . . . . . . . . . . . . . . . .
Security 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-70 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift 2-21, 2-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Information, Truck-Camper 4-45 . . . . . . . . . . . . . . .
Loading Your Vehicle 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle for Off-Road Driving 4-14 . . . . . . . . . .
Lockout Switch 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks
Cylinders 7
-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Check 7-44 . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-43 . . . . . . . . . . . . . . . . . . . .
Power Door 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication, Weatherstrips 6-64, 7-42 . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-43 . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Normal Replacement Parts 6-78 . . . . . . . . . . .
Maintenance Record 7-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Schedule 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Definition 7-6 . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Intervals 7-7 . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-41 . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-46 . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-48 . . . . . . . . . . . . .
Scheduled Maintenance Services 7-4 . . . . . . . . . . . . . . . . . .
Short Trip/City Definition 7-5 . . . . . . . . . . . . . . . . . . . . . . .
Short Trip/City Intervals 7-6 . . . . . . . . . . . . . . . . . . . . . . . .

yellowblue
9-11
Traction 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-56 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-54 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-28, 6-77 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing a Trailer 4-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing, Recreational Vehicle 4-41 . . . . . . . . . . . . . . . . . . . . .
Towing Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Brakes 4
-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches 4-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-59 . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-55 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness 4-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer Case, Electronic 2
-24 . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case Lubricant 6-25, 7-49 . . . . . . . . . . . . . . . . . . . . .
Transfer Case, Manual 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Fluid
Automatic 6
-20, 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual 6-23, 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters, Keyless Entry 2-6 . . . . . . . . . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Lane Change Signals 2-36 . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-35 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-57 . . . . . . . . . . . . . . . .
Underbody Maintenance 6-67 . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Fuse/Relay Center 6-73 . . . . . . . . . . . . . . . . . . . . .
Vehicle
Care/Appearance Materials 6-68 . . . . . . . . . . . . . . . . . . . . .
Control 4-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6
-69 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .