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Weird squeak


2016gmcSierra

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Posted

Hey everyone new to the forum and to gmc. Anyways just brought home a 2016 gmc sierra with 5.3 6 speed auto. What ive been noticing is if i let the throttle off And quickly re apply i get a weird squeak just curious if anyone else gets this truck has 800km.

  • 2 weeks later...
Posted

I had the same issue and its the flapper valve in the exhaust. It's when you go from V4 to V8 mode. Dealer replaced entire exhaust because of this. Also started a thread about it a while ago but sums up exactly what i just said.

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