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Bolt Hardware

Vehicle Requirements

SuperCruise Bolts Not Supported

If your Bolt EUV is equipped with SuperCruise, it is not compatible with the Comma or any fork of openpilot at the moment (and likely never will be, sorry).

Lane Keep Assist System (LKAS)

As with most openpilot compatible cars, the Bolt must be equipped with LKAS (Lane Keep Assist System) in order for openpilot to send steering commands.

Trim Levels with LKAS

Unofficial list

Just a guide to help new users. Please do your own research.

  • 2017-18 EV: Premier trim with Driver Confidence II package ^1
  • 2019-21 EV: Any trim with Driver Confidence II package ^3 ^5
  • 2022-23 EV: All trim levels ^6
  • 2022-23 EUV: All trim levels ^7

Does your Bolt have Adaptive Cruise Control (ACC)?

Both ACC and non-ACC are compatible with StarPilot, but vary slightly in hardware recommendations.

Trim Levels with ACC

  • 2022-23 EV: 2LT trim level with Adaptive Cruise Control package ^7
  • 2022-23 EUV: Premier trim level ^6

Openpilot Hardware List for Bolt

  1. Comma 3X
  2. GM Harness and Harness Box
  3. Comma Pedal (optional, but strongly recommended for non-ACC cars)

Tip

We recommend purchasing from BearTechWorkshop (aka tinybear) whenever possible. They are a small business providing the openpilot community with high quality products and excellent customer support.

Comma Power is not needed

The Comma Power cable is not needed for most GM vehicles (eg. bolt and volt).

The 12V power is provided by the camera harness (or OBD for non-LKAS vehicles) and remains on while the car is powered off.

Should I buy a Comma Pedal?

Our recommendation for whether or not to purchase the pedal depends on if your car is ACC or Non-ACC.

Non-ACC Bolts

In non-ACC bolts, the Comma Pedal is strongly recommended. It allows openpilot to accelerate and decelerate using regen braking and one pedal driving mode (the L gear). It is also capable of stop-and-go (the main reason for comma pedal on other vehicles).

The only reasons to not use a pedal interceptor with your non-ACC Bolt are cost or if you are uncomfortable with the idea of installing the pedal interceptor.

Without the pedal, openpilot is very limited in its ability to control the speed of your vehicle. It will operate using a workaround we call "CCLong" or "Redneck ACC".

ACC Bolts

In ACC bolts, openpilot can request gas and brake commands through ACC commands. However, due to GM limitations, brake commands only use the friction brakes to slow down and regen braking is limited to 10kW (same as coasting in D mode). It also cannot stop-and-go.

If you'd like to use regen & stop-and-go, you can switch your car to CC and install a comma pedal. Keep in mind that you lose the ability for openpilot to use the friction brakes if you do this. It will be limited to the same deceleration rate as L mode + regen paddle press (70 kW), the same as non-ACC bolts.

The pedal's capability may extend at a later time with additional hardware or software changes (resume button harness, virtual pedal tap to just get the car going again with ACC, etc).