InstallationOpen your original key fob and then put the internals like a circuit board in this case. It is a good replacement case for broken or worn remotes. (Does not require reprogramming)MaterialsMixed metal and plastic composition, durable. The size of the key cover shell is 6.3 x 4 x 1.3 cm / 2.48 x 1.57 x 0.51 inches.FitmentFor 2015-2021 Chevrolet Colorado/2014-2021 Chevy Silverado 1500 2500HD 3500HD/2015-2021 GMC Canyon/2014-2021 Sierra 1500 2500HD 3500HD. Fits for M3N-32337100/M3N-32337200/22881480. 4 Button control Cover.ComponentsThis is just a key fob shell with no electronics, chip or battery inside. Designed with 1:1 original key fob, perfect match with your original remote key. The key fob buttons are sensitive and does not affect the key fob signal.NoticePlease check the button position and appearance of your OEM is the same as ours before you buy.