Tail light housing

[66toaster]

I want to clean the tail light reflectors & put in some brighter bulbs. I removed the two knurled nuts, but that is far as I got. The housing won't budge. Is there something else that is holding the housing so securely? TIA

 

[boonies]

I suspect it is stuck due to time and temperature (it has been a while since I pulled mine off. Check to make sure that the finishing upholstered panel is not touching the housing to prevent it from moving, as long as the housing is clear you can keep wiggling it to break the tension on the seal.