How to activate and operate Super Cruise on Hummer EV

3 min read

Hummer EV super cruise

More and more driver assists are being released every month. Super Cruise is GM’s contribution.
It’s fitted to the Hummer EV. This post will explain how to turn it on and off.
Above all, this page should serve as a reminder to read your owner’s manual before using Super Cruise. It’s an incredibly advanced system, but doing something wrong could easily result in a high-speed, multi-car crash.
This article is an overview only and isn’t a replacement for reading the instructions in your owner’s manual. For safety, most might prefer to leave Super Cruise off.
With that said, let’s learn a little more about the Hummer EV’s Super Cruise.

What is Hummer EV Super Cruise?

Super Cruise – activated safely and correctly – allows you to temporarily remove your hands from the steering wheel and pedals on high-quality, multi-lane highways.
You must always be ready to jump back in and take control if the system fails or turns off. This could happen for multiple reasons, so it’s vital to always be aware and alert.
You must also adhere to local laws. For example, these might prevent removing your hands from the steering wheel at any time.

How to turn Super Cruise on in the Hummer EV

You need to be on a compatible road and meet many criteria to be able to use Super Cruise. See your owner’s manual for more information.
Follow the instructions below to turn on Super Cruise in your Hummer EV.

  1. Press the ACC button to turn on Advanced Cruise Control.
    • You’ll find this on the left of your steering wheel.
  2. The white steering wheel icon displays in the instrument cluster when Super Cruise is available.
  3. Press the Super Cruise button.
    • It’s a steering wheel in between lane markings.
    • You’ll find this button next to the ACC control.
    • Always check the white Super Cruise icon is on before pressing the button to avoid severe injury or death.

The ACC is now controlling the speed. It will either maintain the current speed or resume the previously-stored setting.

  • When the steering wheel icon and light bar are blue, Super Cruise is not controlling the steering. You still have to do this yourself.
  • Super Cruise controls the steering when the steering wheel icon and light bar are green.

You can manually override Super Cruise at any time by steering, accelerating, or braking.
Read your owner’s manual for more information about how Super Cruise works (including the significant risks, automatic lane changes, and much more)!

Take Over Alert

Under any number of circumstances, the Hummer EV could instruct you to take control of the car immediately.
Find a more complete list of these situations in the owner’s manual.
If you don’t take control of the steering immediately, the Hummer EV will slow down and eventually stop in your lane. This in itself is incredibly dangerous but slightly less risky than continuing at highway speeds and crashing.

You’ll notice the following:

  • Audible warning
  • The steering wheel icon turns red
  • The bar light turns red
  • Display message appears in the instrument cluster

Resume steering immediately. Super Cruise will deactivate as soon as you grab the wheel.

Deactivating Hummer EV Super Cruise

There are two ways to deactivate Super Cruise on your Hummer EV.

  • Press the Super Cruise button while your hands are on the steering wheel; or
  • Tap the brake pedal.
    • This disengages ACC as well as Super Cruise.

Hummer EV Super Cruise system limitations (non-exhaustive)

Remember the following. Again, this is not an exhaustive list. There are even more dangers that you should be aware of.
A full list can be found in your owner’s manual.
Super Cruise doesn’t work in these conditions:

  • Bad weather
  • Poor road quality
  • Difficult-to-see lane markings
  • No GPS connection
  • A lane is ending
  • No record of the road on the GPS system
  • The Hummer EV is too heavy
  • You’re towing something heavy
  • Air suspension is at an incompatible height
  • Narrow lanes
  • Highway exit lanes
  • Driving too fast (over 85 mph)
  • Looking away from the road (detected by the DAS)
  • Sensor blocked by dirt, debris, a bumper sticker, etc.
  • Sharp curve approaching
  • The system can’t complete a lane change
  • Sensor failure or problem
  • Glitch
  • Fault
  • And more.

Although the system steers and controls your speed…

  • It won’t alert you of any upcoming accidents.
  • It isn’t a crash-warning system.
  • Won’t keep your Hummer EV below the posted speed limit.
  • It won’t work if Teen Driver is switched on.
  • You should never use Super Cruise in any of the following complex driving scenarios:
    • City driving
    • Turning
    • Exiting a highway
    • Intersections
    • Stop lights, traffic lights, or similar
    • Construction zones
    • Temporary lane markings, such as reflectors
    • At toll plazas
    • When you need to brake, steer, or accelerate in an emergency
    • On windy roads
    • Up or down hills and valleys
    • On a road shoulder
    • On slippy surfaces like ice, snow, gravel, or heavy rain
    • On otherwise differently-surfaced streets
    • And more.
  • And more.

Attempting to use Super Cruise in the wrong situation may cause it to malfunction. This is likely to lead to a deadly crash.

You must read your owner’s manual before operating a system as complex as the GMC’s Super Cruise. Misusing it could be fatal. Don’t take any chances.
This article has been an overview but is far from comprehensive. Don’t use Super Cruise until you’ve thoroughly read your owner’s manual and understand the risks involved.
If in doubt, just leave it switched off!
Below, you’ll find the owner’s manual for the Hummer EV. Read through your own copy too.

owners manual


By Ben Kitchen Ben is a qualified car mechanic with experience working in the industry. He now works as an automotive author, writing about all things vehicle-related. He’s excited about the potential held by electric cars of all shapes, sizes, and types.

Ben Kitchen Ben is a qualified car mechanic with experience working in the industry. He now works as an automotive author, writing about all things vehicle-related. He’s excited about the potential held by electric cars of all shapes, sizes, and types.

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