1999 Oldsmobile Bravada I opened the electric sunroof and it went back farther than normal and made a loud clicking noise then when I tried to close it it will only go 1/4 of the way closed and stop I can push the open/close button and it will open all of the way and go about 1/4 closed then stop. Thanks in advance

Does it have a sunroof? It is normally caused by a blocked drain, or a drain hose that has come adrift.

https://www.google.com/search?q=1998+Oldsmobile+Bravada+blocked+sunroof+drain

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Here is the owners manual http://www.manualslib.com/manual/232134/Oldsmobile-1999-Alero.html

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check the negative battery cable. If you get nothing at all when you turn the key, it is usually electrical.

my sunroof is stuck oprn and the close button does not work

does the sunshade open and close properly,you should only be able to move this when the sunroof is closed it should move freely back and forth,if it doesn't this part is causing the noise, its off its track

The sunroof continues to open and close normally from front to back, but the vent stays open.

If you just want to get it closed, and if your motor is still good, your going to have to remove the headliner to get to the motor. Then disconnect your battery. Then remove the wires connected to the motor. You can use your battery if you have extra wire, however i recommend a jumper box. Basically you attach a wire to the negative side of your battery or jumper box, and a separate wire to the positive side. then use the other side of the wires to touch the connectors on your motor.

been raining there?... check battery grounds and all main wiring you can find for poor ground connections...good luck

You will need to access the wiring to the sun roof and check for shorted/damaged wiring that might be rubbing on sheet metal and causing a short circuit, if you find nothing then the sun roof motor may be the culprit.

The AC/Heater unit has electric motors the open and close all the vents and heat to cold doors. when these electric motors begin to open or close past their stop points, the motor try to continue to open and close itself properly, thus fourth its tapping all the time. to see which one it is, turn the heater control to cold and slowly to hot. most of the time, its the heater door. if not, do the same with the vent control. the problem is common withe the GM SUV's.