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). This was a running change on the part of GM and STRATTEC is now out of stock on the old-style heads and only shipping the new heads. STRATTEC also offers the 7013237 with GM Corporate logo for the Sierra and Silverado. There is no change to the programming and they still remain a “10 Cut” design. Part numbers did not change.
More Info: http://aftermarket.strattec.com.