When I remove 2 screws holding backup lense, the assembly will not come out? on 2003 Ford F-250 Super Duty

Have a reverse light out.

Asked by for the 2003 Ford F-250 Super Duty
the lens normally have 4 to 6 screws or 2 lock pins that lock in clips on the fender side of the lens,they do fit very tight
You have to pull the lens straight out after taking those 2 screws out! It has 2 tapered prongs that lock it in opisite of the screws!