[djcwardog]

I looked into the parts for a 2021 Camaro. Here’s what I figured out so far. Different part # for the 2019+ HUD itself. The two plastic dash trim covers didn’t resolve for my car, so probably will be cutting out holes. The HUD Switch and its bezel both have superseded part #’s. I’ve augmented the original post below with the details I’ve uncovered in my research.

HUD – (for 2018 and earlier) 84016314; for 2019+ 84673166 $374.08
HUD Bezel “Trim Cover” - 23168369 - This goes around the hole in the dash $22.64.
HUD Display “Switch” – 23193704, superseded by 84428043 $55.14
Display Switch Bezel “F Plate” – 23197097, superseded by 84499224 $11.71.
I got all four of these in one eBay auction from a 2019 ZL1 donor car.

HUD Bolt “Bumper Cover Bolt” - X 4 – 11589012 $0.85, $3.40 for 4
HUD Nut “Combo Lamp Assembly Nut” - X 4 – 11609759 $3.62, $14.48 for 4.
I got both the above from TotalGMParts online which an Autonation dealership in Florida.

LVDS (USB “Cable” for X2) – 23390635 $67.94
OEM Lead with “Connector Kit” to splice X1 pin 1 to IPC x1 Pin 21. The old part was PT3779 for a 13576542 which was superceded by newer PT2558 for a 19368548. As best as I can see, these two are the same HUD X1 Connectors that come loaded with 8 wires for $40.50.
3 button switch “Connector Kit” PT3130 / 19300398 comes loaded with 4 wires for $37.89.
I found all three of these on Amazon Prime for a great price, almost $40 below the total for the three prices above with free Prime shipping.

I also ordered in a lot of 50 of the 0.64mm (female receptacle) terminal pins for my parts drawers just in case I needed them. These showed as discontinued at Mouser but I found them available at Newark.com, part # 928999-1.

That left me with:
Upper Dash Cover - 84124213 for the 2017-2018 Camaro only. For my 2021 it appears I’ll have to hope for the hole outline on the back and cut it out carefully as seen in the thread.
Front Trim Panel – 84225815 for the 2017-2018 Camaro only. This panel has the hole for the 3 buttons controlling the HUD. (Same - I’ll need to cut it out.)