1999 CHEVROLET SILVERADO power steering

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6-32
Power Steering Fluid
When to Check Power Steering Fluid
It is not necessary to regularly check power steering
fluid unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid loss in this system
could indicate a problem. Have the system inspected
and repaired.
How to Check Power Steering Fluid
When the engine compartment is cool, wipe the cap and
the top of the reservoir clean, then unscrew the cap and
wipe the dipstick with a clean rag. Replace the cap and
completely tighten it. Then remove the cap again and
look at the fluid level on the dipstick.
The level should be at the FULL COLD mark. If
necessary, add only enough fluid to bring the level up to
the mark.
What to Use
To determine what kind of fluid to use, see
ªRecommended Fluids and Lubricantsº in the Index.
Always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.

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6-68
Center Instrument Panel Utility Block
The center instrument panel utility block is located
underneath the instrument panel, to the left of the
steering column.Relay Name Usage
SEO Special Equipment Option
HTD ST Heated Seats
SPARE 4 Not Used
VANITY Headliner Wiring
TRAILER Trailer Brake Wiring
PWR ST Power Seats
SPARE 5 Not Used
CLUTCH Manual Transmission
Clutch Switch
UPF Upfitter
PARK LAMP Parking Lamps
FRT PRK EXPT Not Used
SL RIDE Manual Selectable Ride Switch
SPARE 2 Not Used
RR PRK LP Not Used
RR FOG LP Not Used
SPARE 3 Not Used
INAV PWR Interior Lights Feed
CTSY LP Courtesy Lamps
CEL PHONE Cellular Telephone Wiring

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7-23
Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall). You should let your dealer's
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found in a service manual. See ªService and Owner
Publicationsº in the Index.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook
-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out
-of-position parts as well as open seams,
holes, loose connections or other conditions which could
cause a heat build
-up in the floor pan or could let
exhaust fumes into the vehicle. See ªEngine Exhaustº in
the Index.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the outside
of the radiator and air conditioning condenser. To help
ensure proper operation, a pressure test of the cooling
system and pressure cap is recommended at least
once a year.

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7-25
Part D: Recommended Fluids
and Lubricants
NOTE: Fluids and lubricants identified below by
name, part number or specification may be obtained
from your dealer.
USAGE
FLUID/LUBRICANT
Engine Oil
(Gasoline
Engine)Engine Oil with the American
Petroleum Institute Certified For
Gasoline Engines ªStarburstº
symbol of the proper viscosity. To
determine the preferred viscosity
for your vehicle's engine, see
ªEngine Oilº in the Index.
Engine Coolant50/50 mixture of clean, drinkable
water and use only GM
Goodwrench

DEX-COOL
or
Havoline
DEX-COOL

Coolant. See ªEngine Coolantº in
the Index.
Hydraulic Brake
SystemDelco Supreme 11
Brake Fluid
(GM Part No. 12377967 or
equivalent DOT
-3 Brake Fluid).
USAGEFLUID/LUBRICANT
Windshield
Washer SolventGM Optikleen
Washer Solvent
(GM Part No. 1051515)
or equivalent.
Hydraulic Clutch
SystemHydraulic Clutch Fluid (GM Part
No. 12345347 or equivalent
DOT
-3 Brake Fluid).
Power Steering
SystemGM Power Steering Fluid (GM
Part No. 1052884
- 1 pint,
1050017
- 1 quart, or equivalent).
Manual
Transmission
(5
-Speed with
Low Gear, RPO
MW3)
GM Goodwrench Synthetic
Manual Transmission Fluid (GM
Part No. 12346190
- 1 qt.) or
equivalent SAE 75W
-85 GL-4
Gear Oil.
Manual
Transmission
(5
-Speed without
Low Gear, RPO
MG5)
Synchromesh Transmission Fluid
(GM Part No. 12345349
or equivalent).
Automatic
TransmissionDEXRON
-III Automatic
Transmission Fluid.

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9-6
Inspections (Continued)
Steering 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle System 7-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case (Four-Wheel Drive) 7-24 . . . . . . . . . . . . . . .
Instrument Panel 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intensity Control 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jumper Wiring Harness 4-69 . . . . . . . . . . . . . . . . . . . . . . . .
Interior Lamps 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack, Tire 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-20 . . . . . . . . . . . . . . . . . . . . .
Key Release Button 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry System 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-63 . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-63 . . . . . . . . . . . . . . . . . . .
Lamps 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cargo 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interior 2
-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-36 . . . . . . .
Lighter 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
4WD 2
-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag Off 1-33, 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag Readiness 1-27, 2-71 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-74, 4-7 . . . . . . . . . . . .
Brake System Warning 2-74 . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-12, 2-70 . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift 2-27, 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tow/Haul 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Information, Truck-Camper 4-50 . . . . . . . . . . . . . . .
Loading Your Vehicle 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle for Off-Road Driving 4-17 . . . . . . . . . .
Lockout Prevention 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks
Cylinders 7
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Check 7-22 . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-20 . . . . . . . . . . . . . . . . . . . .
Power Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Coolant Message 2-84, 6-31 . . . . . . . . . . . . . . . . . . . . . .
Low Fuel Message 2-87 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Washer Fluid Message 2-87 . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-20 . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls, Manual 1-3 . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls, Power 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-8
Overheated Engine Protection 5-9 . . . . . . . . . . . . . . . . . . . . . .
Overheating Engine 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-18 . . . . . . . . . . . . . . . . . . . . . . .
Owner Publications, Ordering 8-11, 8-12 . . . . . . . . . . . . . . . .
Paint Spotting, Chemical 6-61 . . . . . . . . . . . . . . . . . . . . . . . .
Park, Shifting Into 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park, Shifting Out of 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking
At Night 2
-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Mechanism Check 7-22 . . . . . . . . . . . . . . . . . . . . . . .
Lots 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Things That Burn 2-38 . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle, Manual Transmission 2-38 . . . . . . . . . . . . . .
Passenger Compartment Air Filter 3-5, 6-18, 6-77 . . . . . . . . .
Passenger Position 1-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passing 4-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passlock
2-12, 2-86 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-23 . . . . . . . . . . . . . . . . . .
Pickup Conversion to Chassis Cab 4-53 . . . . . . . . . . . . . . . . .
Power
Accessory Outlet 2
-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option Fuses 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 2-59 . . . . . . . . . . . . . . . . . . . . . . . .
Seats 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Fluid 6-32, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winches 4-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pregnancy, Use of Safety Belts 1
-24 . . . . . . . . . . . . . . . . . . . .
Problems on the Road 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protecting Exterior Bright Metal Parts 6-59 . . . . . . . . . . . . . . .
Publications, Service and Owner 8-11, 8-12 . . . . . . . . . . . . . .
Radio Reception 3-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radios 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rain, Driving In 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear
Axle 6
-25, 7-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside Seat Position 1-38 . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Comfort Guides 1-41 . . . . . . . . . . . . . . . . . . . . .
Seat Passengers 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window Defogger 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Access Door 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat 1-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rearview Mirror 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night 2-56 . . . . . . . . . . . . . . . . . . . . . .
Inside Day/Night 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reclining Seatbacks 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-25 . . . . . . . . . . . . . . .
Recovery Hooks 5-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle Towing 4-44 . . . . . . . . . . . . . . . . . . . . . .
Reduced Engine Power Message 2-85 . . . . . . . . . . . . . . . . . . .
Refrigerants, Air Conditioning 6-76 . . . . . . . . . . . . . . . . . . . .
Replacement
Bulbs 6
-38, 6-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 6-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Safety Belts 1-66 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reporting Safety Defects 8-10 . . . . . . . . . . . . . . . . . . . . . . . . .

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9-10
Servicing Your Air Bag-Equipped Vehicle 1-34 . . . . . . . . . . .
Sheet Metal Damage 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lever 2-20, 2-24, 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Light 2-27, 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Speeds 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into Park (P) 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting, Manual Transmission 2-24, 2-25 . . . . . . . . . . . . . . .
Shifting Out of Park (P) 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . .
Signaling Turns 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skidding 4-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Snow Plow Prep Package 1-35, 2-54, 4-46, 4-49, 6-72 . . . . .
Sound Equipment, Adding 3-26 . . . . . . . . . . . . . . . . . . . . . . . .
Specifications and Capacities 6-74 . . . . . . . . . . . . . . . . . . . . . .
Specifications, Engine 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speech Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . . .
Speedometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains, Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch Check 7-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-16, 2-18 . . . . . . . . . . . . . . . . . . . . . . .
Steam 5-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Emergencies 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel, Tilt 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step-Bumper Pad 4-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Areas 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Overhead 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Vehicle 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stuck: In Sand, Mud, Ice or Snow 5-33 . . . . . . . . . . . . . . . . . .
Sun Visors 2-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunglasses Storage 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surge Tank, Coolant 5
-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch, Auxiliary Roof Mounted Lamp 2-54 . . . . . . . . . . . . .
Symbols, Vehicle v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate 2-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Removal 2-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamp Bulb Replacement 6-42, 6-44 . . . . . . . . . . . . . . . . . .
Tape Player Care 3-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Control, Climate Control System 3-2, 3-3 . . . . .
Theft 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent Feature 3-23 . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Door 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt Steering Wheel 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-51 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-47 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .