As mustang67408 mentioned, the non DRL and DRL vesions have different Body ECU, relays and totally different wiring on the headlights.
But I was able to install DRL on my Sequoia for only $20 and works great.
The non DRL version switches the the negative side for Hi & Lo beam and the relay supplys the 12V.
I use CASCO Daytime Running Llights KIT p/n 700514.
The cool part of the kit is that it supplies 75%-80% voltage on the orange wire when the yellow wire has 12V and the blue wire does not have 12V. Therefore I conected the yellow to the yellow on the generator and the blue to the 'park' LED signal. This way the DRL is On only when the engine is working and the shiftstick is not on 'park' position. I have connected the red wire to the constant 12V wire for one of the doors and the orange wire to the common pin of one of the the headlights. With this kit and the way I have installed, there is no need to cut any wire or to change wire places or anything like that. I can simply remove all the added wires and the whole thing will go back to the stock non DRL version
