GMC Sierra Denali 2012 Factory Workshop Service Repair Manual

GMC Sierra Denali 2012 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 6.0L(Hybrid) 2012 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 was powered by a 6.2-liter aluminum-block Vortec V8 with variable valve timing that was also E85-compatible.
  • Horsepower: 403 hp @ 5,700 rpm.
  • Torque: 417 lb-ft @ 4,300 rpm.
• Transmission: A heavy-duty 6-speed automatic transmission with a manual shifting mode was standard.
• Drivetrain: It came with a choice of full-time AWD or RWD.
• Towing and payload:
  • Maximum towing capacity: Up to 9,400 lbs.
  • Payload capacity: Up to 1,623 lbs.
• Fuel economy: EPA-estimated fuel economy was 12 mpg city and 18 mpg highway for the AWD model. 

• Comfort: Standard features included heated and cooled perforated leather front seats, a heated leather-wrapped steering wheel, and dual-zone climate control.
• Technology: A Bose premium audio system with a USB port was standard. A new hard-drive-based navigation system with real-time traffic and a rearview camera were also standard. A rear-seat DVD entertainment system was optional.
• Convenience: Other standard features included remote start, power-adjustable pedals, rear parking sensors, and a universal garage door opener.
• Styling: The cabin featured wood-grain and metallic trim accents. 

• Styling: A signature chrome grille, body-color bumpers, chrome body-side moldings, and chrome trim were standard.
• Wheels: Standard 20-inch chrome-clad aluminum alloy wheels set the Denali apart.
• Features: It came with a power tilting and sliding sunroof, fog lights, and tubular side steps. 

• Engine problems: The Active Fuel Management (AFM) system on the 6.2L V8 can lead to excessive oil consumption and potential lifter failure, which can be expensive to repair.
• Electrical system: Some owners reported various electrical issues, including flickering dash lights, faulty 4WD sensors, and HVAC problems, which are sometimes linked to a failing Body Control Module (BCM).
• Interior quality: While luxurious, some interior plastics were known to rattle or crack over time.
• Headlight issues: The Denali’s headlights and corner marker light assemblies were susceptible to burning out due to heat damage, leading to frustrating recurring problems.
• Transmission issues: Some drivers reported that the 6-speed transmission could feel clunky or “hunt” for gears.