One problem related to transmission not engage has been reported for the 2015 Chevrolet Silverado 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Chevrolet Silverado 1500 based on all problems reported for the 2015 Silverado 1500.
When placing the truck in reverse or drive the transmission does not immediately engage. I purchased this truck new and have had two replacement transmissions for this and other issues. Dealer service department said that general motors calls this delayed engagement. Dealer also stated that there is a bulletin stating they will no longer replace transmissions for delayed engagement. This is unsafe when the vehicle is placed in gear and the accelerator is pressed to get the vehicle to move and it does not move for several seconds and the accelerator is pressed harder to get the vehicle to move but suddenly the vehicle transmission will engage and the vehicle will lunge and unexpected distance. This situation occurs more often when the truck is sitting overnight but can happen other times also. I am familiar with the situation and usually remember to not accelerate and wait an extended time for engagement.