2008 GMC Sierra Owner Manual - Introduction - Seats and Restraint Systems

Oct 23, 2026

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Owner manual content for a 2008 GMC Sierra focuses on vehicle safety, seating, and restraint systems, then expands into comprehensive guidance for controls, starting and driving, storage and convenience features, and maintenance. It includes structured navigation elements such as an index and clear safety warning explanations (CAUTION and related symbols), plus references to available supplements for specific engine configurations. It also covers general usage notes for keeping and referencing the manual, and provides publication and ownership information.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages578

Reading Time24 h 17 min

AccessFree to download

Seats and Restraint Systems

Front Seats

Rear Seats

Safety Belts

Child Restraints

Airbag System

Restraint System Check

Features and Controls

Keys

Doors and Locks

Windows

Theft-Deterrent Systems

Starting and Operating Your Vehicle

Starting and Operating

Service and Appearance Care

Service

Fuel

Checking Things Under the Hood

Tires

Maintenance Schedule

Customer Assistance Information

Customer Assistance and Information

Reporting Safety Defects

Vehicle Data Recording and Privacy

Index

2008 GMC Sierra Owner Manual M Seats and Restraint Systems ........................... 1-1 Front Seats ............................................... 1-3 Rear Seats .............................................. 1-12 Safety Belts ............................................. 1-14 Child Restraints ....................................... 1-35 Airbag System ......................................... 1-68 Restraint System Check ............................ 1-87 Features and Controls ..................................... 2-1 Keys ........................................................ 2-3 Doors and Locks ...................................... 2-10 Windows ................................................. 2-15 Theft-Deterrent Systems ............................ 2-18 Starting and Operating Your Vehicle ........... 2-22 Mirrors .................................................... 2-55 Object Detection Systems .......................... 2-63 OnStar® System ...................................... 2-65 Universal Home Remote System ................ 2-68 Storage Areas ......................................... 2-74 Sunroof .................................................. 2-79 Instrument Panel ............................................. 3-1 Instrument Panel Overview .......................... 3-4 Climate Controls ...................................... 3-25 Warning Lights, Gages, and Indicators ........ 3-34 Driver Information Center (DIC) .................. 3-54 Audio System(s) ....................................... 3-80 Driving Your Vehicle ....................................... 4-1 Your Driving, the Road, and Your Vehicle ..... 4-2 Towing ................................................... 4-50 Service and Appearance Care .......................... 5-1 Service ..................................................... 5-4 Fuel ......................................................... 5-6 Checking Things Under the Hood ............... 5-12 Rear Axle ............................................... 5-51 Four-Wheel Drive ..................................... 5-52 Front Axle ............................................... 5-54 Noise Control System ............................... 5-56 Headlamp Aiming ..................................... 5-56 Bulb Replacement .................................... 5-59 Windshield Wiper Blade Replacement ......... 5-65 Tires ...................................................... 5-66 Appearance Care ................................... 5-112 Vehicle Identiﬁcation ............................... 5-121 Electrical System .................................... 5-122 Capacities and Speciﬁcations ................... 5-130 Maintenance Schedule ..................................... 6-1 Maintenance Schedule ................................ 6-2 Customer Assistance Information .................... 7-1 Customer Assistance and Information ........... 7-2 Reporting Safety Defects ........................... 7-14 Vehicle Data Recording and Privacy ........... 7-16 Index ................................................................ 1 GENERAL MOTORS, GM, the GM Emblem, GMC, the GMC Truck Emblem, and the name SIERRA are registered trademarks of General Motors Corporation. This manual includes the latest information at the time it was printed. We reserve the right to make changes after that time without further notice. For vehicles ﬁrst sold in Canada, substitute the name “General Motors of Canada Limited” for GMC whenever it appears in this manual. This manual describes features that may be available in this model, but your vehicle may not have all of them. For example, more than one entertainment system maybe offered or your vehicle may have been ordered without a front passenger or rear seats. Keep this manual in the vehicle for quick reference. Canadian Owners A French language copy of this manual can be obtained fr

FAQs

What safety warning types are explained in the manual?

The manual explains CAUTION boxes for hazards that could hurt people and provides guidance on reading these cautions. It also describes safety symbols such as a circle with a slash indicating “Do Not” actions and separate vehicle damage notices.

Which topics are covered in the Seats and Restraint Systems section?

The manual lists front and rear seats, safety belts, child restraints, the airbag system, and a restraint system check. It also introduces related safety information at the beginning of that section.

What should owners do regarding using and keeping the manual?

The manual instructs owners to keep it in the vehicle for quick reference. It also notes that many people read the manual from beginning to end when they first receive a new vehicle to learn about features and controls.

Oct 23, 2026

Upload by Logic