I have a 2020 Silverado z71 rst with a lift kit (bought from dealership this way). It has 3184 mi on it and has hardly been driven. Last week the check engine light came on followed by the following alerts
engine power reduced
service trailer brake system
service 4wd

it also began to idle rough and make clicking noises
anyone have any opinions on why this brand new beautiful truck would be doing this?

 

drive by wire throttle actuator faults can cause this... its hard to say without knowing the fault codes. One powertrain fault can disable all the other systems. bring it to the dealer and they will fix it for free.