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Dash USB Wiki

Turn a Raspberry Pi into a smart USB drive for your GM vehicle's built-in dashcam (Surround Vision Recorder). The car limits footage to a rolling 2 hours no matter how big the drive is — Dash USB snapshots the recordings before the car deletes them and archives everything to your own server. A web UI lets you review and back up footage — no SSH, no config files.

Install over SSH

No prebuilt SD card image yet. Flash Raspberry Pi OS Lite (64-bit), connect over SSH, and follow Getting Started.

On a Pi already running Pi OS:

sudo apt update && sudo apt upgrade -y
sudo -i
curl -fsSL https://raw.githubusercontent.com/Sentry-Six/Dash-USB/main/install-pi.sh | bash

Refresh and upgrade packages first to avoid stale package-index errors.

Then open http://dashusb.local and the Setup Wizard takes you the rest of the way.

What you need

Tier	Boards	Notes
Recommended	Raspberry Pi 4B, Raspberry Pi 5	USB 2.0 OTG — fastest archiving, best web UI responsiveness
Should work	Raspberry Pi Zero 2 W, Raspberry Pi 3 Model A+	USB 2.0 OTG, slower archive speeds

The Pi 3 Model B and B+ will not work. Their single USB channel runs through an onboard hub chip that provides Ethernet and the four USB-A ports, which leaves the micro-USB port power-only with no OTG support. The 3A+ omits that chip, so its micro-USB port is wired straight to the SoC and can act as a USB gadget.

Plus:

• A high-endurance MicroSD card, 256 GB or larger (512 GB recommended — GM records roughly 5 GB per hour of driving, all of which Dash USB keeps until space runs out)
• A USB-C data cable (not charge-only) — Pi to any of the car's USB-C ports
• Wi-Fi; internet access is required for initial setup, updates, and cloud archiving

Your vehicle needs GM's Surround Vision Recorder feature (the built-in rolling dashcam on newer GM EVs and ICE vehicles). Confirmed working on a 2026 model — the car accepts the Pi's USB 2.0 gadget even though GM's spec sheet says USB 3.0.

Quick Links

Page	What's on it
Getting Started	Installation walkthrough
Setup Wizard Guide	Every wizard step explained
Archive Methods	CIFS, rsync, rclone, NFS
Notifications	Push notifications to your phone
Privacy	Outbound data and privacy controls
Troubleshooting	Things that go wrong
FAQ	Common questions

Links

• Site: sentry-six.com
• GitHub: Sentry-Six/Dash-USB
• Releases: Latest
• Discord: Community chat
• License: PolyForm Noncommercial 1.0.0 (source-available; free for noncommercial use)

Dash USB is the GM sibling of the Tesla project Sentry USB, from the Sentry Six project. Not affiliated with General Motors.