H3 Sunroof won't close the last 3 inches. I close it then immediately auto opens to the same spot.

SOURCE: sun roof won't close

the limiter switch on your sunroof has died. common to gm's.

you will have to replace the entire motor assembly as the limiter switch is built into the motor assembly.

you can do it yourself of take it to a reputable reapir shop.

SOURCE: sunroof will not close

If the motor is stuck, you can probably hold the switch to the forward position, and smack the roof. This may allow the motor to start working. I don't think there is any way to do it manually.

SOURCE: The sunroof on my 2002 VW Golf is stuck in a

try this first (cheapest remedy first) open the sunroof fully take key out of ignition shut all doors then put the key in drivers door and hold key over 30 secs to unlock car(windows will go down)then wait 30 secs.then put key back in drivers door and hold key over 30 secs to lock car,windows will go up and the sunroof will close.if the sunroof does not shut properly then we start with motor park switch.....

SOURCE: My Oldsmobile Alero sunroof is stuck open and will not close.

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

SOURCE: sunroof on 1998 chevy cavalier z24 won't close all the way

It can be faulty motor or loose wiring issue or faulty /weak sunroof controlling switch or there is some blockage for sunroof to come down to close or sunroof out of its track the headliner is out of its way.There re many possibilities.All this basics needs to be checked.For further troubleshooting,go through this help link:----
Click the link mentioned below:------
How to Manually Close the Sunroof ? http://howtobyme.blogspot.in/2012/05/how-to-manually-close-sunroof-on-2001.html

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Sunroof Stuck open? http://howtobyme.blogspot.in/2012/05/2001-lexus-is300-sunroof-stuck-open.html

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How to manually close Sunroof on Navigator? http://technoanswers.blogspot.com/2012/01/how-to-manually-close-sunroof-on-2000.html

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This will help.
Thanks.