71 suburban 3dr Doors are stuck shut?

[bigtony55]

I just picked up a 71 3dr suburban both front doors are stuck **** i unlocked them trying inside and out side handle nodda put penetrating oil on the latch can hear them sound like the are moving just not releasing and opening the 3rd works perfect the tailgate is also shut stuck is this commen on these is there a trick to getting them open? i was thinking of pulling the front seat out and tear into the door behind the panel but with both inside and outside handle moving free and sounding liek they are working not sure if it woudl do me any good?