u/trahoots

I’m making a spreadsheet of preschool options and I was differentiating between places where they can start at 2 years and 9 months vs 2.9 years, which would be about 2 years and 10.8 months. Now I’m learning that when they write 2.9 years, that actually just means 2 years and 9 months. What? Do they think there are only 10 months in a year? How does that mathematically make any sense at all?

I know... another cruise control post. We got a 2017 Volt (without ACC) in December in a private sale and the cruise control worked for a little bit, but then only worked intermittently. I've looked through a lot of posts on here and tried a lot of things, but I can't find a definitive "yes, do this and it fixes it." I've seen posts that say "take it to the dealership, there's a fix!" but if there is, my dealership doesn't know about it.

Here's what we've tried:

• December 2025: first noticed cruise control working intermittently. Tried pulling up on the brake pedal and that did let cruise control turn on, but would go off when I let go of the brake. After a while, it wouldn't even turn on when I pulled up on the brake.
• Soon after, I tried the "pump the brakes really hard" method and that didn't do anything.
• I tried the "rubber band hack" method, and that made it work for a couple days. Then it stopped. Made the rubber band tighter, and it worked again for a day. Tried to make the rubber band tighter again and I broke the sensor.
• Installed a new brake pedal position sensor same day as breaking it, cruise control still not working.
• Took it to the dealership, explained all of this. They recalibrated the pedal position sensor and said cruise control was working properly. Five minutes into the drive home, cruise control stopped working.

I've seen two other things I could try. This post talks about some sort of bracket that can be installed to fix it, but the person deleted their profile and didn't explain. Does anyone know about that and whether it works?

One other thing is that I found a post talking about service bulletin 16-NA-147 but that seems to be about a squeaky noise. Has anyone tried this, and did it fix the cruise control issue?

Are there any other things to try? The dealership said if cruise control isn't working it might be an issue with the wiring in my car, but I tried explaining that it's a widespread issue, not just this car, but they seem to have never heard of the issue.

Our 2017 Volt got the classic BECM failure symptoms: propulsion power reduced, battery fully charged but showed 0 EV range, check engine light on, codes P1E000, U2619, U2620, U2621, U2622, U2623, U2624.

The only weird thing is that the car was driven a short distance, turned off, then turned back on an hour later and the reduced propulsion was gone (it was working normally) but the check engine light and codes are there still. From reading other posts on here, it sounds like usually when the BECM fails, people are stuck in the "reduced propulsion" mode until they get it fixed. Is our BECM just going out, but not fully broken yet? We did have a "reduced propulsion" message months ago, but I think that was a normal thing where the car was driven down to zero battery and it was trying to charge it up a little when started. That's not what happened this time. I'm waiting on a call back from the dealership, but just thought I'd check to see if anyone else had intermittent symptoms like this.

And just because I think it's helpful to always link to these because someone on here probably just bought a Volt for the first time and it's their first time hearing about this, here's the service bullet about the BECM:

https://static.nhtsa.gov/odi/tsbs/2022/MC-10209256-0001.pdf

And here's the extra coverage up to 15 years or 150,000 miles for the BECM:

https://static.nhtsa.gov/odi/tsbs/2024/MC-10251431-0001.pdf