High pitch noise

[moreash14]

When I get up to 2500 rpms I hear a high pitch whistle sound and can't figure out where it coming from when I put the truck in park it doesn't make the noise when I accelerate. Any ideas?

 

[01sporttracguy]

did you just happen to install any kind of air intake or make recent changes to it?

 

[Trackerforsport]

Take the passenger side light out and make sure nothing is front of the intake or check for pieces of plastic hanging on the truck

 

[moreash14]

No I've had a k&n for awhile but it only makes the sound when in drive