NHTSA Complaint #11625522 — 2021 RAM PROMASTER

My van began making a loud squeaky sound, louder at low speeds and less at higher speeds. It sounded like it was coming from the wheels or undercarriage. There were no dash warning lights, alarms, or any other indicator of a serious issue. I drove the van around town for a few days approximately 30 miles. The van is heavy and I live in a hilly area, so I use the parking brake fairly often. I applied the parking brake within that week on an incline, and when I released the parking brake and drove forward, the squeak was louder then ever, so much so, people stared. There were no error or warning message on the dash or elsewhere. The parking brake indicator had come on normally while engaged and went off when it was released. I drove it directly to the local Ram dealer, as it seemed worse, hoping it was just in need of minor lubrication. It had just been serviced at the same dealer a few months earlier and I was told "it was like new with its low 12,500 miles". I explained the new noise and that I didn't want to cause damage by driving it, although there were no warning lights on. My van is still under the original warranty for a few more months. Even though they were booked, an employee went out and felt by the rear driver's side wheel and said it was really hot and likely a frozen brake caliper. They were able to fit me in and discovered the parking brake was frozen, which was causing the noise. They ordered the parts to repair, disengaged the parking brake, and said it was safe to drive as the main brakes were a separate system. They said not to apply the parking brake again as it would hang up as before. -The dealer ordered the parts over a month ago, but said the brake parts are not only on back order, but with no estimated shipping date, meaning they aren't even manufacturing them. -I am driving without a parking brake in a heavy vehicle in a hilly area with no pending solution and heading into winter weather. This is a safety issue! Please help ASAP.