So after replacing the pass disable bulb last year; I'm getting an intermittent code 27 recently. More noticeable on cold (near or below freezing) days.

The light still works; most times, so has something become loose, or could there be another source for the 27 code?

 

Resolder joints again. Maybe want to just replace bulb again when you do that.

 

I figured it probably cracked a joint, it's been 20yrs since I last soldiered.

If I recall I replaced it with a led bulb; so should be good for the life of the truck!