I have a '94 'burb with the tailgate & glass hatch, exactly the same as the K5 Blazer. The switch "Rear Window Release" to "pop" the glass, under the headlight switch used to "pop"/unlock the glass. Walk around and lift the glass up. Same with the key in the handle of the tailgate, turn it and the hatch glass would become unlocked, ready to lift up. This is exactly the info out of my '94 'burb/Blazer owners manual.

Neither the key nor the switch is doing that anymore. If you hold the switch or the key "on", it will allow the glass to be lifted up.

I have removed the tailgate interior panel and verified the solenoid plunger is working correctly, everything is lubed and moving smoothly.

Anyone have the factory adjustment procedure?