General Motors has revised the head of the ignition/door keys for the 2014 Chevrolet Silverado and 2014 GMC Sierra. These keys are STRATTEC part numbers 5924205 (Silverado) and 5924206 (Sierra). The photo shows the new heads. STRATTEC is now out of stock on the old style heads and only shipping the new heads. There is no change to the programming and they still remain a “10 Cut” design. Continue to order the same part numbers as they have not changed.
More Info: http://aftermarket.strattec.com