For your situation, I would suggest going with a high-end dual setup because the 2023 Envision actually has pretty great cable routing paths if you know where to look. I've been running the VIOFO A229 Pro 4K Dash Cam with 2-Channel Front and Rear Recording in mine for about six months now and honestly, the performance is killer.

Here is the technical breakdown of how I handled the install:

1. **Power Source:** Don't mess with the auto-dimming mirror wires if you want parking mode. The Buick system is super sensitive to voltage drops. I used a VIOFO HK4 Hardwire Kit for A229 Series and tapped into the fuse box located in the passenger footwell. Use the 'Heated Steering Wheel' fuse for ignition-only or find a constant power fuse if you want 24/7 monitoring. Basically, fuse taps are way cleaner than mirror adapters.
2. **Cable Routing:** Tucking the wires into the headliner is actually easy! The trim around the A-pillar is tight, but if you pull the weather stripping down slightly, you can tuck the cable behind the airbag—seriously, don't run it *over* the airbag for safety reasons. I used some 3M VHB Tape and small foam strips to prevent any rattles near the mirror housing.
3. **Rear Cam:** I went with the 2-channel setup cuz the Envision's rear pillars are kinda thick and leave blind spots. Running the cable to the back takes about 20 mins—just stay under the door sill plates.

I'm super satisfied with the Samsung PRO Endurance 256GB microSDXC UHS-I U3 V30 card I paired with it too. It handles the high bitrate 4K video without any heat issues. Plus, staying under $300 is totally doable if you catch a sale on the Viofo gear. gl with the install!! 👍

Sooo I saw this and HAD to jump in because I've spent way too much time messing with GM mirror housings over the years! For your situation, I've found that the 2023 Envision is actually pretty awesome for a clean install, but you gotta be careful with that plastic trim behind the mirror—it’s kinda finicky and can snap if you’re too aggressive.

I honestly suggest looking into a mirror tap if you want to keep things simple, but since you’re looking for a full setup, a dedicated hardwire kit to the fuse box is the way to go for parking mode. If you’re worried about rattles in the headliner, basically just use some Tesa tape (the fuzzy stuff) on the wires every 6 inches or so. It’s a total lifesaver and keeps things silent!!

Here’s a couple of setups I’ve personally seen work great in the $300 range:

* Thinkware Q1000 2K QHD Dual-Channel Dash Cam with 32GB microSD - This one is fantastic because it has a super low profile that hides well behind the Envision's bulky sensor housing.
* Garmin Dash Cam 67W 1440p Compact Dash Cam - If you want something tiny that won't distract you, this is amazing. You'd need two if you want rear coverage tho.
* Dongar Technologies Dash Cam Power Adapter 10-pin Type H for Buick - This is the "magic" adapter that plugs right into your auto-dimming mirror power so you don't have to run wires to the floor!

I'm not 100% sure if the 2023 uses the exact same 10-pin plug as the 2022, so maybe double-check your connector first? But yeah, hardwiring to the fuse box with a Nextbase Hardwire Kit is usually safer if you want that 24/7 protection. Good luck with the install, you’re gonna love the peace of mind! 👍

Tbh, if you're worried about the headliner and the trim bits, you should definitly check out the Fitcamx Dash Cam for Buick Envision. I'm a bit of a DIY nerd and I love this one because it actually replaces the plastic shroud behind the mirror. No wires to tuck across the roof or down the A-pillar - it basically looks factory once its on. It uses a Y-harness that taps into the power for the rain sensor or the mirror - wait, I think its the camera sensor plug - but basically its a plug and play situation. I think it runs around $170 for the front-only version, which is well under your $300 budget. If you go this route, the install takes like 10 minutes max and you don't even need to mess with fuse taps or routing cables through the side curtains. Just be careful with the plastic clips when popping the old housing off - I used a nylon pry tool instead of a screwdriver to avoid scratching anything. The only real downside is the app can be a bit clunky compared to the big brands, but for a super clean OEM look that wont rattle, its realy hard to beat!

To add to the point above: the hardware choice is huge, but the install safety is what really matters. Over the years, I've seen way too many DIYers just stuff wires into the A-pillar without thinking about the side curtain airbags. If you don't route that cable behind the airbag frame, you're looking at a serious safety hazard if it ever needs to deploy. Basically, the thread has already covered the best routes like the integrated shroud look or the standard hardwire kit. Just a quick warning though... GM plastic clips are notoriously brittle. If you're working in a cold climate, definitely run the heater for a bit before you start pulling on that mirror housing or the pillar trim. If you force it while it's cold, you're almost guaranteed to snap a tab. Take your time with the wire tucking and you wont have any rattles.

Quick question - are you planning on doing the install yourself or taking it to a shop? Honestly, I've done both over the years and it totally changes which path I'd suggest for that $300 budget.

Basically, I've tried a few ways in my GMs:

* **Mirror Tap:** Super clean and fast, but sometimes lacks the power for those fancy parking modes.
* **Fuse Box:** Bit more of a headache to tuck the wires, but it's the most reliable for 24/7 recording imo.
* **Cigarette Lighter:** The "cheap and dirty" way that I used for years before I got brave enough to pull trim panels.

I'm currently using a setup that I hardwired myself into the fuse panel because I wanted that extra security while parked. It was a bit of a struggle getting the wires past the A-pillar without blocking the airbag, so I'm curious if you're comfortable popping those panels off or if you're looking for the easiest possible plug-and-play vibe? Let me know and I can give you some tips on how I kept mine from rattling!

Been using this for years, no complaints