Quick update on my driver side DRL being out.
Somewhere earlier in this thread someone posted that part #6002TZ0303 was the driver LED ballast. So I set up a search on ebay for when a used one shows up. About a month ago I got a hit and bought a used one for $45. The seller guaranteed me it came off a working headlight. So I pulled the headlight assembly and swapped modules. It's a bit of a challenge, given how short the cable is inside the assembly. I got the module on, connected the assembly back up to the truck (I did not re-install the assembly, have been around the block in my life). I turned on the headlight, and the DRL was still off! This means that either I was sold a bad one, or it wasn't this module (this one was the smaller of the two on the assembly), or something else went bad inside the assembly.
I called the dealer. Yup, $1325+sales tax for a new OEM assembly. I thought about it for a couple of weeks, but then I saw a black Friday sale on a non-OEM replacement for only $335 on Amazon! The brand was Dashbecan (there is another branded Fione for about the same money). Here's the link:
https://www.amazon.com/Dasbecan-Headlight-Compatible-2019-2022-68316085AD/dp/B0CDPN516P/?th=1
So I ordered it Monday, it came Wednesday, and I installed it today. Literally every thing about this knock-off is identical to the original. The part numbers stamped on the plastic components, the weight, the fit, the headlight brightness, the LED brightness, every small detail - everything is the same as the original - except is doesn't say RAM on the chrome outer headlight trim. (I have not yet verified the 15 degree movement of the headights when cornering, but I will. ) The inner headlight chrome has the same stenciling as the original regarding the 15 degree pivot.
I don't why a company would take on the cost of reverse engineering something like this to produce their own. There can't be enough demand to justify the trouble and expense. I bet that the Chinese manufacturer that FCA has making these is allowed to sell a non-branded version.
I'm happy I took the chance. For the cost of one OEM assembly I could buy 4 of these. I'll post my long term experience later.