Dear Bill, My late Nov. 81 vin 6058 had the same problem once. The fault was the cable that attaches to the interior door latch. Try pushing the latch down while unlocking the door. If this doesn't work you will have to gently take off the upper door trim. With the trim off, lift the handle and watch how the cable sticks. With your fingers or a pair of needle nose pliers, lift the interior latch and pull of the cable...this should release the door IF this is the problem. Mike