I have a 2013 Buick LaCrosse and I've noticed that whenever the low fuel light comes on, the amount of chimes is random.  I either get 2 rounds of 4 chimes, or one round of 5, 6, or 7. 

 

Is there any reason behind this that anyone knows of?

Configurable chimes set on 'random'.

I'd love to be able to configure my chime alerts

That makes sense.

My nissan rental has the most annoying chimes I have ever heard in a car.

I obsess over everyone making sure their belts are on, so that I never, ever have to hear it again.

 

I guess it's doing its job then

I'm against Ford/Lincoln's new 80's retro video game chimes.  They sound ridiculous.  You get a car like a BMW, or even a Hyundai, and they have like orchestrated startups.