GMC Sierra 3500 HD 2021 Getting To Know Your Manual

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GMC Sierra 3500 HD 2021 Specification

The 2021 GMC Sierra 3500 HD is a robust heavy-duty truck designed for demanding tasks and exceptional performance. Powered by a choice of two engines, it offers a standard 6.6-liter V8 gasoline engine producing 401 horsepower and 464 lb-ft of torque, and an available 6.6-liter Duramax Turbo-Diesel V8 delivering 445 horsepower and 910 lb-ft of torque. Both engines are paired with a 10-speed Allison automatic transmission, ensuring smooth power delivery and optimal fuel efficiency.

The Sierra 3500 HD boasts a maximum towing capacity of 36,000 pounds and a payload capacity of up to 7,442 pounds, making it ideal for heavy-duty hauling and towing. The truck's frame is constructed with high-strength steel, enhancing durability and stability under load. The suspension system features independent front suspension and a rear multi-leaf setup, providing a balanced ride and improved handling.

Interior comfort and technology are also prioritized. The cabin offers premium materials, ample legroom, and advanced noise-cancelling features for a quiet ride. The infotainment system includes an 8-inch touchscreen, Apple CarPlay, Android Auto, and available navigation. Safety features include forward collision alert, lane departure warning, and a multi-view camera system, enhancing driver awareness and confidence.

The exterior design reflects its rugged capabilities, with a bold grille, LED lighting, and a variety of bed lengths and configurations. The MultiPro Tailgate, exclusive to GMC, provides six unique functions to facilitate loading, unloading, and accessing the cargo bed. Overall, the 2021 GMC Sierra 3500 HD combines powerful performance, advanced technology, and versatile functionality, making it a top choice for those requiring a reliable and capable heavy-duty truck.

GMC Sierra 3500 HD 2021 F.A.Q.

What is the recommended oil type for the GMC Sierra 3500 HD 2021?

The recommended oil type for the GMC Sierra 3500 HD 2021 is SAE 0W-20 full synthetic oil.

How do I reset the tire pressure monitoring system on my GMC Sierra 3500 HD 2021?

To reset the tire pressure monitoring system, turn the ignition to the ON position, press the tire pressure reset button located under the steering wheel until the TPMS light blinks three times, then drive the vehicle for about 20 minutes.

What is the towing capacity of the GMC Sierra 3500 HD 2021?

The GMC Sierra 3500 HD 2021 has a maximum towing capacity of up to 36,000 pounds when properly equipped.

How often should I change the air filter on my GMC Sierra 3500 HD 2021?

It is recommended to change the air filter every 15,000 to 30,000 miles, depending on driving conditions.

What should I do if the check engine light comes on in my GMC Sierra 3500 HD 2021?

If the check engine light comes on, check for any obvious issues such as a loose gas cap. If no obvious issues are found, it is advisable to have the vehicle checked by a professional mechanic to diagnose the problem.

How can I improve the fuel efficiency of my GMC Sierra 3500 HD 2021?

To improve fuel efficiency, maintain proper tire pressure, use cruise control on highways, avoid excessive idling, and keep up with regular vehicle maintenance.

What are the common causes of battery drain in the GMC Sierra 3500 HD 2021?

Common causes of battery drain include leaving lights on, electrical accessories plugged in, faulty alternator, or old battery.

How do I pair my phone with the GMC Sierra 3500 HD 2021's Bluetooth system?

To pair your phone, activate Bluetooth on your phone, navigate to the Bluetooth settings on the vehicle's infotainment system, select your phone from the list of available devices, and follow the prompts to complete the pairing process.

What is the correct tire pressure for the GMC Sierra 3500 HD 2021?

The recommended tire pressure for the GMC Sierra 3500 HD 2021 is typically 65 psi for the front tires and 80 psi for the rear tires, but you should always check the sticker on the driver’s door for specific details.

How do I engage the four-wheel-drive system on my GMC Sierra 3500 HD 2021?

To engage the four-wheel-drive system, shift the vehicle into neutral, turn the four-wheel-drive selector switch to the desired mode (4HI or 4LO), and wait for the indicator light to confirm engagement.