GMC Sierra Denali 2008 Factory Workshop Service Repair Manual

GMC Sierra Denali 2008 Factory Workshop Service Repair Manual

These are the same manuals used by professionals to diagnose and repair these models.

Loaded with illustrations, instructions, photos, and diagrams, complete to service and repair your vehicle. Read and print pages directly or copy the entire manual to your hard drive.

CD COVER:

GMC Sierra Denali 4.3L 4.8L 5.3L 6.0L 6.2L 7.0L 6.6L 2008 Service Manual

SERVICE MANUAL COVER:

Engine

12 V Starting and Charging

Engine Controls and Fuel

Engine Heating and Cooling

Engine Mechanical

Exhaust

Body Hardware and Trim

Exterior Trim

Floor Coverings and Headlinings

Instrument Panel and Console Trim

Interior Trim and Paneling

Body Repair

Bolted Exterior Body Panels and Closures

Bumpers and Fascias

Collision Repair

Frame and Underbody

Paint and Coatings

Body Systems

Horns and Pedestrian Alerts

Lighting

Mirrors

Vehicle Access

Wipers and Washers

Brakes

Antilock Brake System

Disc Brakes

Hydraulic Brakes

Park Brake

Diagnostic Overview, Starting Point, and Programming

Driveline and Axle

Wheel Drive Shafts

Driver Information and Entertainment

Active Noise Cancellation

Cellular, Entertainment, and Navigation

Displays and Gauges

Image Display Cameras

General Information

Air|Wind Noise

Maintenance and Lubrication

Vibration Diagnosis and Correction

Waterleaks

HVAC

Heating, Ventilation, and Air Conditioning

Preface

Dangers, Warnings, and Cautions

Roof

Removable Top

Safety and Security

Driver Assistance Systems

Immobilizer

Parking Assistance Systems

Remote Functions

Seat Belts

Supplemental Restraints

Theft Deterrent

Seats

Seat Hardware, Trim, and Upholstery

Seat Heating and Cooling

Steering

Power Steering

Steering Wheel and Column

Suspension

Front Suspension

Rear Suspension

Suspension General Diagnosis

Tire Pressure Monitoring

Tires and Wheels

Wheel Alignment

Transmission

Automatic Transmission

Electronic Transmission Range Select

Transmission Cooling

This manual is the same as the manual used by workshops. Service Manual contains detailed instructions and step by step diagrams for all workshop procedures.

Language: English 
Format: PDF

COMPATIBLE WITH ALL WINDOWS & MAC COMPUTERS 
(WINDOWS 11, WINDOWS 10, WINDOWS 8 ETC.)

Windows/Mac/Tablet/Phone Friendly

• Engine: The Denali featured a high-output 6.2-liter aluminum-block Vortec V8 engine with variable valve timing. It produced 403 horsepower and 417 lb-ft of torque.
• Transmission: A heavy-duty 6-speed automatic transmission was standard. This was a significant upgrade over the 4-speed automatic in the previous generation, improving both performance and fuel efficiency.
• Drivetrain: All-wheel-drive was standard.
• Towing and payload:
  • Maximum towing capacity: 8,400 lbs.
  • Maximum payload capacity: 1,617 lbs.
• Fuel economy: EPA-estimated ratings were 12 mpg city and 18 mpg highway. 

• Comfort: Standard features included leather upholstery, heated 12-way power front seats, a heated leather-wrapped steering wheel with wood-grain inserts, and dual-zone climate control.
• Technology: A Bose premium sound system with a 6-disc CD changer and XM Satellite Radio was standard. An optional navigation system and a rear-seat DVD entertainment system were also available.
• Convenience: The Denali came with power-adjustable pedals, remote start, rain-sensing wipers, heated windshield washer fluid, and rear parking sensors. 

• Signature Styling: A unique chrome grille, body-color bumpers, chrome trim, and 18-inch polished aluminum wheels were standard. 20-inch wheels were an available option.
• Features: Standard features included fog lights, auto-delay off headlamps, and an EZ-lift tailgate. 

• Active Fuel Management (AFM): This system, designed to improve fuel economy by deactivating cylinders, is a known source of problems in some GM engines from this era. It can lead to excessive oil consumption and can cause issues with engine lifters, leading to expensive repairs.
• Interior quality: While considered luxurious for its time, some reviewers noted that some interior plastics could feel cheap compared to the premium price tag. Some owners also report rattling and cracking dashboards.
• Electrical problems: Malfunctions in the electrical system, often attributed to a failing Body Control Module (BCM), have been reported.
• Transmission issues: Some drivers reported that the new 6-speed transmission could feel clunky or “hunt” for gears.