General Motors LLC (GM) is recalling certain software intended for 2015 vehicles that was installed by service centers into model year 2014 Chevrolet Silverados and GMC Sierras equipped with Allison A1000 transmissions. The incorrect software may cause the transmission indicator not to display that gear position “1” has been selected. As such, this vehicle does not conform to Federal Motor Vehicle Safety Standard (FMVSS) number 102, “Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect.”