2021 GMC Sierra Owner’s Manual

2021 GMC Sierra Owner’s Manual Review

Our website provides the latest GMC owner's manuals with essential information on vehicle operation, care, and maintenance. On this page, you can find the 2021 GMC Sierra Owner’s Manual in PDF, available for full-screen online viewing or download to your computer or smartphone.

If your car is not listed on our website or if you have any questions, please check manuals for other model years below.

2021 GMC Sierra – a full-size K4-class pickup with rear- or all-wheel drive. The fifth generation of the model debuted in March 2018.

For the release of the fifth generation of the Sierra, GMC took a special approach. First, for the first time in a long period, the vehicle appeared two months later than its twin brother, the Chevrolet Silverado. Second, the pickups had never before differed so much in appearance from each other.

The Sierra received its own design. In addition to a radically changed front end – the shape of the massive radiator grille, headlights resembling the sharp claws of a predatory bird, bumper, and hood – the truck also received different styling for the doors, fenders, and tailgate.

However, despite the visual differences, technically the truck is still a “blood relative” of the Silverado. Like the latter, it moved to the new T1 platform instead of the previous K2, as a result of which its wheelbase increased by 100 mm, the distance between the first and second rows grew by 40 mm, and the cargo bed became more spacious. At the same time, despite this increase, the pickup not only did not gain weight but even shed about two hundred kilograms. This result was achieved thanks to the new frame and aluminum body parts: doors, hood, fenders, and tailgate. What truly distinguishes the Sierra are its unique options. One of them is the carbon fiber cargo bed, which is not only 28 kg lighter than the standard steel one but also better resists scratches and is not subject to corrosion. Another distinctive feature from the Silverado is the MultiPro tailgate with a folding section, which can ultimately extend into a step.

We also have owner's manuals for other vehicle years:

• 2024 GMC Sierra Owner’s Manual
• 2023 GMC Sierra Owner’s Manual
• 2015 GMC Sierra Owner’s Manual
• 2000 GMC Sierra Owner’s Manual
• 2016 GMC Sierra Owner’s Manual
• 2001 GMC Sierra Owner’s Manual
• 2017 GMC Sierra Owner’s Manual
• 2002 GMC Sierra Owner’s Manual
• 2018 GMC Sierra Owner’s Manual
• 2003 GMC Sierra Owner’s Manual
• 2019 GMC Sierra Owner’s Manual
• 2004 GMC Sierra Owner’s Manual
• 2020 GMC Sierra Owner’s Manual
• 2005 GMC Sierra Owner’s Manual
• 2022 GMC Sierra Owner’s Manual