power steering GMC YUKON 1999 User Guide

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7-39
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.
Throttle System Inspection
Inspect the throttle system for interference or binding,
and for damaged or missing parts. Replace parts as
needed. Replace any components that have high effort
or excessive wear. Do not lubricate accelerator and
cruise control cables.

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7-41
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 OilEngine 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.
Parking Brake
Cable GuidesChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.
Power Steering
SystemGM Power Steering Fluid (GM
Part No. 1052884
- 1 pint,
1050017
- 1 quart, or equivalent).
Automatic
TransmissionDEXRON
-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Chassis
LubricationChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.

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9-7
Mirrors 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside 2
-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview with
Compass/Temperature Display/Headlamp Delay 2
-51 . . . . .
Electrochromic Heated Outside Rearview 2-54, 3-7 . . . . . .
Inside Rearview 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Remote Control 2-54 . . . . . . . . . . . . . . . . . . . . . . . . .
MMT 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Reference vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mountain Roads 4
-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multifunction Lever 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net, Convenience 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Neutral, Automatic Transmission 2-26 . . . . . . . . . . . . . . . . . .
New Vehicle Break-In 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Night Vision 4-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Maintenance Replacement Parts 6-65 . . . . . . . . . . . . .
Odometer 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer, Trip 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-Road Driving 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-Road Recovery 4-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil, Engine 6-11, 6-65, 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . .
OnStar
System 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overdrive, Automatic Transmission 2-27 . . . . . . . . . . . . . . . .
Overheating Engine 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-35 . . . . . . . . . . . . . . . . . . . . . . .
Owner Publications, Ordering 8-12, 8-13 . . . . . . . . . . . . . . . .
Paint Spotting, Chemical 6-53 . . . . . . . . . . . . . . . . . . . . . . . .
Park
Automatic Transmission 2
-25 . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Out of 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking
At Night 2
-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Mechanism Check 7-38 . . . . . . . . . . . . . . . . . . . . . . .
Lots 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Things That Burn 2-36 . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Position 1-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passing 4-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passlock
2-20, 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-39 . . . . . . . . . . . . . . . . . .
Power
Auxiliary Outlet 2
-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Locks 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Adjustment 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option Fuses 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 2-54 . . . . . . . . . . . . . . . . . . . . . . . .
Seat 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Fluid 6-27, 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Lumbar Adjustment 1-3 . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy, Use of Safety Belts 1-22 . . . . . . . . . . . . . . . . . . . .
Problems on the Road 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protecting Exterior Bright Metal Parts 6-52 . . . . . . . . . . . . . . .
Publications, Service and Owner 8-12, 8-13 . . . . . . . . . . . . . .

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9-10
Servicing Your Air Bag-Equipped Vehicle 1-29 . . . . . . . . . . .
Sheet Metal Damage 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lever 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting
Automatic Transmission 2
-25 . . . . . . . . . . . . . . . . . . . . . . .
Into Park (P) 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Out of Park (P) 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shoulder Belt Height Adjuster 1-16, 1-32 . . . . . . . . . . . . . . . .
Signaling Turns 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skidding 4-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sound Equipment, Adding 3-22 . . . . . . . . . . . . . . . . . . . . . . . .
Specifications and Capacities 6-63 . . . . . . . . . . . . . . . . . . . . . .
Specifications, Engine 6-63 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speech Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . . .
Speedometer 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speed-Sensitive Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains, Cleaning 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch Check 7-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steam 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Emergencies 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speed-Sensitive 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel, Tilt 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage Compartments 2
-55 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Overhead 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Vehicle 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stuck: In Sand, Mud, Ice or Snow 5-32 . . . . . . . . . . . . . . . . . .
Sun Visors 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunglasses Storage 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols, Vehicle v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate 2-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate, Glass Release 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telephone, Cellular 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent System 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Arming 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disarming 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shock Sensor 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turning Off 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Gear, Automatic Transmission 2-27 . . . . . . . . . . . . . . . .
Tilt Steering Wheel 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .