Crazy Noise/vibration

[Foxracer]

i have a 2006 single cab chevy 4x2 every ones in a while i have a strange noise that sounds like something is vibrateing under the truck. the local dealer says its normal.. i know its not any ideas?

[jerksville]

Might wanna give more details. does it happen at a certain speed, on acceleration, decceleration, braking, hitting bumps. Getting more specific on when it occurs can isolate it a little better.

[Foxracer]

well it sometime when u are at a light and take off some times with cruise control on sometimes just sitting still... it really just depends

[jerksville]

Check heat shields, Ive seen O2 sensor rattle too. Also if you feel it thru the steering wheel more check front end components. A worn mount or bushing can do this also. Since it sounds kinda random id just get under there and do a visual check and get my hands on things and see if I can duplicate the issue otherwise when it happens if possible try to check it out then.