1999 GMC YUKON Service engine soon

Scheduled Maintenance
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7-5
Short Trip/City Definition
Follow the Short Trip/City Maintenance Schedule if any
one of these conditions is true for your vehicle:

Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.

Most trips include extensive idling (such as frequent
driving in stop
-and-go traffic).

You operate your vehicle in dusty areas or
off
-road frequently.

You frequently tow a trailer or use a carrier on top of
your vehicle.

If the vehicle is used for delivery service, police, taxi
or other commercial application.
One of the reasons you should follow this schedule if
you operate your vehicle under any of these conditions
is that these conditions cause engine oil to break
down sooner.
Short Trip/City Intervals
Every 3,000 Miles (5 000 km): Engine Oil and Filter
Change (or 3 months, whichever occurs first). Chassis
Lubrication (or 3 months, whichever occurs first). Drive
Axle Service (or 3 months, whichever occurs first).
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 30,000 Miles (50 000 km): Fuel Filter Replacement.
Every 50,000 Miles (83 000 km): Automatic
Transmission Service (severe conditions only).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and Lines
Inspection. Exhaust Gas Recirculation System
Inspection. Evaporative Control System Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transmission Service (normal conditions). Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.

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9-6
Labels
Certification/Tire 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-55 . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information 4-43 . . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-55 . . . . . . . . . . . . . . . . . . .
Lamps 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Exterior 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delay 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog 2-48, 6-36, 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-34 . . . . . . .
Lighter 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Bag Readiness 1
-25, 2-73 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-75, 4-7 . . . . . . . . . . . .
Brake System Warning 2-74 . . . . . . . . . . . . . . . . . . . . . . . . .
Charging Warning System 2-73 . . . . . . . . . . . . . . . . . . . . . .
Check Gages 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps Indicator 2-81 . . . . . . . . . . . . . . .
Headlamp High-Beam Indicator 2-81 . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-10, 2-72 . . . . . . . . . . . . . . . . . . . . .
Security 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-76 . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Four-Wheel Drive 2-80 . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Lane Change Indicator 2-81 . . . . . . . . . . .
Loading Your Vehicle 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . Loading Your Vehicle for Off
-Road Driving 4-15 . . . . . . . . . .
Lockout Prevention 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Security 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder 7-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Check 7-38 . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinder Service 7-36 . . . . . . . . . . . . . . . . . . . . .
Power Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication, Weatherstrips 6-50, 7-36 . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-36 . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Carrier 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Normal Replacement Parts 6-65 . . . . . . . . . . .
Maintenance Record 7-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Schedule 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Definition 7-6 . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Intervals 7-6 . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-35 . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-39 . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-41 . . . . . . . . . . . . .
Scheduled Maintenance Services 7-4 . . . . . . . . . . . . . . . . . .
Short Trip/City Definition 7-5 . . . . . . . . . . . . . . . . . . . . . . .
Short Trip/City Intervals 7-5 . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Underbody 6-53 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Trailer Towing 4-53 . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp 2-76 . . . . . . . . . . . . . . . . . . . . . .
Methanol 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-9
Driver Position 1-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extender 1-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Wear Properly 1-14 . . . . . . . . . . . . . . . . . . . . . . . . .
Incorrect Usage 1-17, 1-55, 1-56 . . . . . . . . . . . . . . . . . . . .
Lap Belt 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lap-Shoulder 1-14, 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Larger Children 1-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Position 1-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Questions and Answers 1-13 . . . . . . . . . . . . . . . . . . . . . . . .
Rear Comfort Guides 1-34 . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat Outside Passenger Positions 1-30 . . . . . . . . . . . .
Rear Seat Passengers 1-30 . . . . . . . . . . . . . . . . . . . . . . . . . .
Reminder Light 1-10, 2-72 . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing After a Crash 1-57 . . . . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-23 . . . . . . . . . . . . . . . . . .
Shoulder Belt Height Adjuster 1-16, 1-32 . . . . . . . . . . . . . .
Smaller Children and Babies 1-38 . . . . . . . . . . . . . . . . . . . .
Use During Pregnancy 1-22 . . . . . . . . . . . . . . . . . . . . . . . . .
Why They Work 1-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Defects, Reporting 8-10 . . . . . . . . . . . . . . . . . . . . . . . .
Safety Warnings and Symbols iii. . . . . . . . . . . . . . . . . . . . . . .
Scheduled Maintenance Services 7
-4 . . . . . . . . . . . . . . . . . . . .
Seatback, Reclining Front 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . Seats
Folding the Rear 1
-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Front 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Rear 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Adjustment 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraint Systems 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Controls 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing a Child Restraint 1-48, 1-50, 1-52 . . . . . . . . . . . .
Second Gear, Automatic Transmission 2-27 . . . . . . . . . . . . . .
Security Light 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Shade 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulletins, Ordering 8-12, 8-13 . . . . . . . . . . . . . . . . . . . . . . .
Engine Soon Light 2-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manuals, Ordering 8-12, 8-13 . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification Label 6-55 . . . . . . . . . . . . . . . . . . . . . . .
Publications, Ordering 8-12, 8-13 . . . . . . . . . . . . . . . . . . . .
Work, Doing Your Own 6-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Service and Appearance Care 6-1 . . . . . . . . . . . . . . . . . . . . . .
Service and Owner Publications 8-12, 8-13 . . . . . . . . . . . . . .
Service Four-Wheel Drive Warning Light 2-80 . . . . . . . . . . . .
Service Publications 8-12, 8-13 . . . . . . . . . . . . . . . . . . . . . . . .