The mysterious gas pedal "Peep"

Maintenance/Repairs
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1

I finally have a truck! And it works!

My 2016 Sierra 1500 4x4 has been a dream since I got it about a year ago. I am finally starting to turn it into the adventure-mobile i have always wanted.
In the last few weeks or so however I have been hearing a mysterious “squeak” in the cabin. I hear it mostly when I am driving on the highway and I add a little more gas. Or when I back off and then accelerate again like in light to moderate highway traffic. I have also heard it when in cruse controle under the same circumstances (like the computer adding more gas going up a hill). The noise seems to be coming from the back right of the cab (a cab-and-a-half style) and sound like a baby chicken going “peep”. I have a hard time reproducing it and it is always a single “peep” when it happens.

It has started to get cold recently and I have recently had an aluminum truck cap installed.
Is this something I should investigate? or is it a turn up the stereo kind of problem?
Thanks!

2

I would say that if no other symptoms occur, and this one gets no worse, fuhgeddaboudit.

3

You’re gonna need a tech to actually hear it to figure out what it is I expect. Fuel pumps and fuel injectors can make a sound sort of like that, although I’d describe tha as more of a high pitched whine, squeal, or a buzz. If you have ABS brakes , could be that too, although ABS is often described more as “rumbling” sounds. As it seems to occur during acceleration, more likely the first two than the latter.

4

Did this start after you put the topper on? If so, first thing i’d do is take it off and see if it the noise goes away.

1 Like
5

Suspension system could cause that too. During acceleration the front of the truck goes up and the rear down, so maybe that movement is causing a squeak somewhere. I’d guess a strut or bushing.