# The mysterious gas pedal "Peep" **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** noises, sierra1500, gmc\ **Created:** [January 18, 2019, 1:25am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859 "2019-01-18T01:25:34Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Broke\_joe](https://avatars.discourse-cdn.com/v4/letter/b/7ba0ec/32.png) [@Broke\_joe](https://community.cartalk.com/u/Broke_joe)\ **Post date:** [January 18, 2019, 1:25am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859/1 "2019-01-18T01:25:34Z")
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! ---
**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\ **Post date:** [January 18, 2019, 2:54am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859/2 "2019-01-18T02:54:29Z")
I would say that if no other symptoms occur, and this one gets no worse, fuhgeddaboudit. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [January 18, 2019, 3:00am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859/3 "2019-01-18T03:00:27Z")
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. ---
**Author:** ![TenB33R5](https://avatars.discourse-cdn.com/v4/letter/t/b77776/32.png) [@TenB33R5](https://community.cartalk.com/u/TenB33R5)\ **Post date:** [January 18, 2019, 3:33am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859/4 "2019-01-18T03:33:43Z")
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. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [January 18, 2019, 3:44am UTC](https://community.cartalk.com/t/the-mysterious-gas-pedal-peep/132859/5 "2019-01-18T03:44:24Z")
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.