GMC Sierra Denali 2008 Owner's Manual

GMC Sierra Denali 2008 manual cover
Pages 478
Year 2008
Language(s)
English en

GMC Sierra Denali 2008 Specification

The GMC Sierra Denali 2008 is a premium full-size pickup truck that combines power, luxury, and advanced technological features. Under the hood, it is equipped with a 6.2-liter V8 engine, capable of producing 403 horsepower and 417 lb-ft of torque. This engine is paired with a six-speed automatic transmission, providing smooth and responsive gear shifts. The vehicle boasts an all-wheel-drive system which enhances its capability in various driving conditions.

The Sierra Denali 2008 features a robust exterior design with chrome detailing, a distinctive Denali grille, and 18-inch polished aluminum wheels. Inside, the cabin is designed for comfort and convenience, offering leather-appointed seating, wood grain accents, and dual-zone automatic climate control. The truck also includes a Bose premium sound system, a navigation system, and a rear-seat DVD entertainment system, ensuring an enjoyable driving experience.

Safety is a priority in the GMC Sierra Denali 2008, with standard features such as anti-lock brakes, stability control, and front and side-impact airbags. Additionally, the truck is equipped with OnStar, providing services like automatic crash response and turn-by-turn navigation.

The truck's towing capacity is notable, rated at up to 9,600 pounds, making it suitable for heavy-duty tasks. Fuel efficiency stands at an estimated 12 mpg in the city and 18 mpg on the highway. The GMC Sierra Denali 2008 is designed to deliver a blend of performance, luxury, and utility, catering to drivers who require both power and refinement in a pickup truck.

GMC Sierra Denali 2008 F.A.Q.

How do I reset the oil life monitor on my 2008 GMC Sierra Denali?

To reset the oil life monitor, turn the ignition to the "ON" position without starting the engine. Press the accelerator pedal three times within five seconds. The oil life will reset to 100%, and the "Change Engine Oil Soon" message will disappear.

What type of engine oil is recommended for the 2008 GMC Sierra Denali?

The 2008 GMC Sierra Denali typically requires SAE 5W-30 engine oil. It is recommended to use oil that meets GM Standard GM6094M for optimal performance.

How can I troubleshoot the check engine light on my 2008 GMC Sierra Denali?

To troubleshoot the check engine light, use an OBD-II scanner to read the diagnostic trouble codes (DTCs). These codes will help identify the specific issue. Common causes include a loose gas cap, faulty oxygen sensors, or spark plug problems.

What is the recommended tire pressure for a 2008 GMC Sierra Denali?

The recommended tire pressure for the 2008 GMC Sierra Denali is typically 35 PSI for both front and rear tires. Always check the owner’s manual or the tire placard located on the driver's side door jamb for exact specifications.

How do I replace a headlight bulb in the 2008 GMC Sierra Denali?

To replace a headlight bulb, open the hood and locate the back of the headlight assembly. Remove the dust cover, disconnect the wiring harness, and twist the bulb counterclockwise to remove it. Insert the new bulb, reconnect the harness, and replace the dust cover.

What is the towing capacity of the 2008 GMC Sierra Denali?

The 2008 GMC Sierra Denali has a towing capacity of up to 8,700 pounds, depending on the specific configuration and equipment. Always refer to the owner’s manual for precise towing guidelines.

How do I perform a transmission fluid check on my 2008 GMC Sierra Denali?

To check the transmission fluid, start the engine and let it reach normal operating temperature. Park on a level surface, shift through each gear, then place in Park. With the engine running, remove the dipstick, wipe it clean, reinsert it, then check the fluid level.

Why is my 2008 GMC Sierra Denali making a squeaking noise when I brake?

A squeaking noise during braking can be caused by worn brake pads, glazed pads or rotors, or debris caught between the pad and rotor. Inspect the brake components and replace or service as necessary.

How can I improve the fuel efficiency of my 2008 GMC Sierra Denali?

Improve fuel efficiency by maintaining proper tire pressure, using recommended engine oil, keeping up with regular maintenance, and avoiding excessive idling. Reducing unnecessary weight and using cruise control on highways can also help.

What should I do if the battery light comes on in my 2008 GMC Sierra Denali?

If the battery light illuminates, it indicates a charging system issue. Check the battery connections, inspect the alternator belt, and test the battery and alternator for proper function. Seek professional help if the issue persists.