I'm having the same problem on the same make and model. Is there a manual emergency release in the trunk? Did you get it fixed? If so how?
Remove the shift release lever cover with a small screwdriver. After it is raised up high enough or off, then you can press the release switch manually.
Some cars have an auxilary release lever/wire located in the trunk. Short of that, you may be able to locate the activation line from underneath the release lever housing and pull it manually.
It's on the gear lever.
There is a lever under the seat at the front edge.
should be a release lever next to the e- brake padel
A Rancher ES Should have a lever in the storage compartment to manually shift gears with.
on the floor to the left of the driver's seat, the same lever as the trunk release. It has icons.
The lever came loose. It needs be re-attached. I have had to do that manually and it requires going into the door.
The lever beside the drivers seat lifts for opening the boot and you push down on that lever to open the fuel cover.
If you are saying you have to manually turn the blinker on and off by hand, then the flasher relay is bad. If you are saying you have to hold the turn signal lever in position and it does work and flashes on and off by doing this, then the turn signal lever is broken inside and needs replacing.
The lever is located on the bottom of the steering column. If it's not locking, the lever may just be jammed and you just need to wiggle it a bit.
The 1992 GMC parking brake release lever can be found on the bottom of the dashboard. Pulling the lever towards the passenger compartment will release the parking brake.