[Off Oil]

I use ACC literally every day and have never had a problem. That said, you need to keep the sensors and camera area clean for proper operation. If you need service you can go to any Chevy "Volt Certified" dealership. If you go to the Chevy website, it lists the dealers in your area, and it will show you whether or not they are certified. In my area all are, but it's still wise to check prior.

 

[Loboc]

The human needs to learn the system capabilities.

1. There is a gap setting.
2. Like standard CC, brakes turn ACC off. In Volt, regen paddle also turns it off.
3. The operation is like riding with a teen driver. Very reactive instead of situational awareness.
4. Wash the dang car.
5. Environmental conditions can fool the sensors. Fog, rain, snow, sunlight, reflections at night, bumpy road, etc can all affect operation.
6. Stopped cars ARE NOT detected.
7. On curved or hilly roads, the camera and radar still point straight ahead.
8. Cars leaving or entering the lane are not detected immediately.

I use ACC every day. It is a rather large learning curve to use it in city traffic. I also drive in 'L' exclusively. For me, ACC seems to brake more smoothly in 'L'.

 

[BAZINGA]

The human needs to learn the system capabilities.

1. There is a gap setting.
2. Like standard CC, brakes turn ACC off. In Volt, regen paddle also turns it off.
3. The operation is like riding with a teen driver. Very reactive instead of situational awareness.
4. Wash the dang car.
5. Environmental conditions can fool the sensors. Fog, rain, snow, sunlight, reflections at night, bumpy road, etc can all affect operation.
6. Stopped cars ARE NOT detected.
7. On curved or hilly roads, the camera and radar still point straight ahead.
8. Cars leaving or entering the lane are not detected immediately.

I use ACC every day. It is a rather large learning curve to use it in city traffic. I also drive in 'L' exclusively. For me, ACC seems to brake more smoothly in 'L'.

+1 I have ACC on my 17 Volt and 17 GMC Acadia and use it almost daily and love it. In fact I go out of my way to find places to engage and use it.

My advice to the OP is to take his car to his local Volt certified dealer and have it looked at.

 

[Off Oil]

I use ACC every day. It is a rather large learning curve to use it in city traffic. I also drive in 'L' exclusively. For me, ACC seems to brake more smoothly in 'L'.

Those are lots of good hints, however I would never use it (and haven't) off the highway. I see more downsides than benefits in that scenario.

I would add:
9. The individual is always responsible for control of the vehicle. (Don't lose your life or endanger others, like the SEAL with the Model S.)