I’d look for a wine bottle cooler bag and use it upside down as a sunscreen/weather protector. Maybe make extra cuts and use Velcro to hold it closed.
You mat be having an issue that needs attention, but there's nothing inherently wrong with this Engine/Transmission combination! All the power, torque and responsiveness needed in a pickup of this size and capability.
The purpose of the Gear Display in D is so you can restrict how high it can shift. Press + or - to display the gear list and then press - and the highest gear will be reduced by 1 each time you press - . You can increase the highest gear as needed back to 10.
Damn! I've got Build 18295 and can't get it to update over the Air and I followed all the instructions and got a Install Failed message with USB drive.