[Phil]

Door on my 2500 heavy duty (2006) is a bit sqeeky. Sounds loose but everything seems tight. Actually sounds like rubber. Tried silicon spray but temporary fix. Only 85k miles

 

[ImperialCrown]

Welcome to Allpar. Is the noise coming from the hinges and door check? Silicone spray may be too light-bodied for hinge lube.
Try a heavier grease or oil lube. Work the hinges to get the lube to penetrate the hinge/check mechanism and the noise should go away.

 

[Phil]

Noise comes from above door strike. ( Right at left ear!) Can feel it move driving over a rough area when I put my finger into where food seals onto body. I tried setting door strike in a bit. Really didn't help.
Silicon spray I sprayed into door seals, not hinges. Thanks