since it's been cold outside, my 2002 f150 has had this loud intermittent buzzing noise coming from behind the whole dash especially on the passenger side.

it only happens 1-when it's cold outside 2-when i'm stopped completely 3-i'm rolling slowly (brake nor the gas pressed)

i've taken it to the dealer and those jacka$$es gave me a run around that they couldn't hear it. funny how they heard it when i came up there and drove it for them. they ended up installing some insulation in the dash and not fixing a thing. it's getting worse now that it's getting colder outside. it's doing it a lot more.

i've heard 2 theories, 1-the PCV valve or 2-the cable that's found behind the break pedal that connects to the transmission and ends at the stearing column. it's used for gear selection.

does anyone have a clue? i'm getting desperate!! thanks to anyone that can help.