Tail gate will not disengage? - 2000 GMC Sierra

Check with a multi-meter that the switch itself has a open/closed function(ohm meter setting)Hope this helps....

obviously a problem with the auto mechanism , is there a sensor located , see your owners manual, in a particular area that has to bee kept clear and you may have inadvertantly placed something over the sensor , just guess as something must be telling the tailgate to shut , with the age of vehicle is it still covered under makers warrenty ? i'll look into the sensor thing

you may have a bad switch which is located on the latch asm

if your vechicle was built with security system you should be able to disengage by turing key in drivers door or tail gate

need to unscrew the main latch and reset

Open tail gate. Use the access square inside - pull cable to open tail gate. Remove interier panel - 2 bolts plus 2 screws (2 bolts on handle and 1 screw each side), pull remainder out of guide clips. Now have full access to locking mechanism. Identified a retaining spring had come loose sending guides to shift left (exterior point of view). Place hand in tail gate and move guides over and put spring in place to retain. verify it works and put back together. Handle is the trickiest part as the bolts have to go through the interior panel and afix to the metal tail gate.

Bad window regulator

Hi open the lift gate there is 2 screws holding the tail light after removing the screws there are 2 locating pins pull to disengage when you reinstall push the tail light in to engage the pins

Hi;The latch/ouside handle is held on by four bolts on the inside of tailgat. Remove the four bolts and the handle should come clear so you can see the mechanism. Your on you own now.

I also have this problem and don't know what to do.
Marge58