Just purchased a 15 Sierra 1500 slt with 13600 on the clock last Monday...have the same squeaky brake pedal noise...was gonna spray the bushings with some white silicone to see if that fixes it...don’t wanna bring it back to the dealership...owned it for a week and brought it back for a loud blower motor (ended up being a leaf in there) and got the truck back with a scratch on the passenger rear...called them and they gave me a hassle so I fixed it myself...now I have 2 years of free maintenance and a warranty that’ll probably never be used again...I guess even big name dealerships suck too lol
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