I lost my head lights, dome light, horn door

Truck Body Control module aka Body control module..
things like locks,windows,wipers,etc on most new vehicles the switches you use don't go directly to the device they just send a signal to the module that sends it to the device telling it to do what it is supposed to do.
Hope that isn't as clear as mud.

#1: Panel Illumination
#2: Guages,Right High beam headlight and the high beam indicator
#3: Rear Wiper, Left headlight High Beam
#4: RH park, backup lights switch and relay,Speed porpotional steering module,power door lock switch illumination and daytime running lights(Canada)
#5: Power Door locks,Power Mirrors,vanity,dome,map,ignition and trunk lights,sunroof,radio,power antenna,body control module and power for the data link connector
#6:Heated mirrors,heated rear window indicator
#7: Instrument cluster illumination,park and tail lights
#8: Cigarette lighter,Radio Amp and horns
#9: Power door lock motors
#10: Not used
#11: Radio
#12:Left low beam head light
#13,14,15,16 not used

trace wires to find the short

Beings as everything that stopped working is on the passenger side, I'd think some wiring got disconnected or broken.

To disable the drl/auto lights press the dome override button 3 times.a chime will sound once you've successfully done it to let you know.

the actuator for the dome light is actually located inside the lock mechanism. Have you checked to make sure the dome light override button is in the out position?

replace the relay that powers makes the bulbs fliker

I don't have the answer, but I am looking for the solution for a 2006 Silverado crew cab.

Usually you just grab the edge and pull or pry gently with a screwdriver. and yes, you can just replace the bulb.

The dome light gets 12 volt battery power at all times. The door switch, when the door is opened, allows the current to flow to ground, and completes the circuit. The door switch allows the ground to be made. Measure for 12 volts at the wiring connector, and measure for direct short at the ground wire, with the door open. The Ground wire is white with a black tracer.