Prove to my insurance that my car has ABS?

No, that's not indicated in the VIN. However, any GM dealer should be able to look up the VIN and give you a printout of what equipment is on the vehicle -- there has to be a record of it somewhere.

Failing that, Plan B is to drive your car to the agent's office, take off a wheel, and show him the ABS sensor on the hub.

"Failing that, Plan B is to drive your car to the agent's office, take off a wheel, and show him the ABS sensor on the hub."

LOL, that's a bit overboard, don'tcha think?

I deal with insurance ppl all the time. What I tell people is that if your agent fails to decode or is unable to decode the VIN for safety feature discounts, it's time for a new insurance company or agent. :-)

ABS was an option on your car. Perhaps you have a copy of the original window sticker stored away somewhere? And if not then do drive your car to the office and turn the key so the agent can actually see the ABS light on the dash.

IIRC, ABS was also accompanied with a TC button as well.

No, not really. He already said that *telling* the agent he has an ABS light on his dashboard wasn't good enough; what makes you think that *showing* him an ABS light would be any better? The presence of a light on the dashboard doesn't prove that the car is actually equipped with ABS -- but the presence of an ABS sensor on the hub sure does.

Complete nonsense. That's not encoded in the VIN.

He already said explicitly that he bought the car used and does not have a copy of the sticker.

Yikes! Next time, open hood, take photo and text it to your insurance company.

Above driver's side wheel well area near the firewall is the black painted power brake unit. Attached front center is the metal brake master cylinder that has a plastic brake fluid reservoir atop of it. Follow the metal tubes from master cylinder to nearby (inches!) metal box with some electric cables and more metal tubes attached. That box is the ABS unit. No box, no ABS.