I added some LED tail lights to my Silverado that I really like, but haven’t found anything for the Malibu yet. I saw some on eBay, but the description of the product had about every make and model under the sun and I quickly quit looking there.
I found a video of a user called silversurfer, he changed his taillights and you can see that the stop and turn signal work ... in the comments he mentions that they are plug and play but then he says that they were installed professionally. I also found this device to convert two-wire circuits to three wire in the taillights to separate stop and turn signals, I think this is the solution for the taillights issues.
Like what who did? This thread is about the aftermarket taillights.
I have my front turn signals (on my Gen7) wired to act as DRLs instead of my low beams.
When I designed the circuit, I chose to have both DRLs go dark when one is flashing. I plan to change that so that the one not flashing stays on. That way I'll have constant DRL light. But I've also noticed in the bumpers and tailgates of cars in front of me that when I use a turn signal, the first flash is kinda deceiving because the signal being flashed stays on while the DRL goes out, so it looks like the other side is gonna flash before the actual signal starts to do so.
It's an easy circuit, so if you want to have your front signals to be DRLs instead of your low beams, it's possible.
Switchbacks take no wiring mods AFAIK. The dim white comes on with the running lights, the bright amber comes on with the turn signals. Instead of just adding the extra light from the TS, the switchbacks turn off the running lights to allow the TS to flash.
That's different from using the TS as DRLs.
When you do your checks, if you have more questions, just ask and we'll see if we can answer them.