The passenger's side window squeals very loudly when first being rolled up from the full down position. I've greased everything inside the door that I can reach, and fired off a full can of WD-40 in the general direction of areas that I can't reach. No effect.

Any suggestions? Could it be that the squeal is actually coming from the window channel rather than inside the door?


195? Chevy 3800 dump truck
1973 Chevy C30 cab and chassis
1987 Suburban 3/4 ton 6.2L Diesel