Tneely

My truck 2016 gmc sierra is squeaking something fierce. Bought it brand new... From what I've been told it's a flap valve in the exhaust system. Dealer or G.M. still haven't fixed the problem. Nothing but the run around and lip service! My truck 2016 gmc sierra is squeaking something fierce. Bought it brand new... From what I've been told it's a flap valve in the exhaust system. Dealer or G.M. still haven't fixed the problem. Nothing but the run around and lip service!

I have a 2016 GMC Sierra and this squeak that it makes is seriously annoying. I bought this truck brand new about 4 months ago, this is rediculous. Dealer said they've never heard of this, not getting much help. If I wanted a squeaky Truck I would have kept my old one. I want it fixed ASAP or refund my money.