Grinding noise when braking

[Alijahjm]

2018 Silverado.

 

I’ve been experiencing a grinding noise the last 3 months when I’m braking, although it doesn’t sound like it’s in the brakes it sounds like it’s in the engine, more in the transmission. I’ll be slowing down and in the last 20-30 feet before a complete stop I’ll get a grinding noise in the engine/transmission. It doesn’t do it every time, but several times a day.

 

Ive been to the dealership twice for this and they couldn’t replicate the problem, both occasions it happened only minutes after leaving the dealership...

 

one tech thought by my description that it was the valve body on the transmission, then said later that maybe it was the ABS misbehaving. But nothing was determined.

 

i feel like it’s transmission related because for the for the past 2 years I’ve owned this brand new truck I’ve been into the dealership several times, starting only 3-4 months after purchasing the truck new, for issues where the transmission will down-shift really hard. They’ve updated the computer which helped a little, bit it still happens occasionally.

 

anyone out there with any ideas? Thank you.

[Sierra Dan]

You have a new/newer truck with a full warranty.

Find another dealer willing to dig deeper 

Sometimes it is the dealer that makes the difference.

Edited May 15, 2019 by Sierra Dan