SLT, and AT4 trims. 2021 changes For 2021, the Silverado and Sierra pickups saw relatively few changes. Most notably, the Silverado 1500 offers the newly named Multi-Flex six-position tailgate, which is borrowed from the GMC Sierra, and the introduction of wireless CarPlay and Android Auto projection capability. The 2.7-liter 4-cylinder and 3.0-liter Duramax diesel-equipped Silverado and Sierra models see increased tow capacity ratings and new towing technology, including a jack-knife alert and trailer length indicator. Several colors were changed on the Silverado; Havana Brown Metallic and Cajun Red Tintcoat are replaced by Oxford Brown Metallic and Cherry Red Tintcoat, respectively, and Mosaic Black Metallic is a new addition. 2021 Sierra models received color changes as well; Deep Mahogany Metallic, Red Quartz Tintcoat, and Carbon Black Metallic are replaced with Brownstone Metallic, Cayenne Red Tintcoat, and Ebony Twilight Metallic, respectively. Smokey Quartz Metallic was removed from the available color options and Hunter Metallic was added as a new paint color. For the 2021 GMC Sierra, the previously un-named "Sierra" trim becomes the "Pro". Forward Collision Alert, Automatic Emergency Braking, and Front Pedestrian Braking options are now available on Silverado WT and Custom trim levels as part of the Safety Confidence Package. Crew Cab Standard Box Sierra 1500 models are now only available in four wheel-drive. Silverado and Sierra 3500HD dually models see an increase in max-towing capacity to . Due to the global microchip shortage, some 2021 Silverado and Sierra vehicles are built without options like Automatic Start-stop and heated and ventilated front seats, heated outboard rear seats, and heated steering wheel. 2022 changes The 2022 Chevy Silverado LTD and GMC Sierra Limited entered the model lineup as a stop-gap measure until production of the newly refreshed 2022 model begins. As such, the 2022 Silverado LTD and Sierra Limited have very few changes from the 2021 models. Notable changes for the 2022 Limited models include the deletion of both the 4.3-liter LV3 EcoTec3 V6 and 5.3-liter L82 EcoTec3 V8 with active fuel management (AFM) gasoline engines, which have been discontinued, as well as the previous "6L80" six-speed automatic transmission, leaving only eight-speed and ten-speed units. The LT Trail Boss trim-level (Chevrolet) is now available with the 3.0-liter Duramax turbodiesel engine. 2022 refresh For the 2022 model year, the Chevrolet Silverado 1500 and GMC Sierra 1500 receives a mid-cycle refresh that includes the following new trim levels for the Chevrolet Silverado, called