Disconnect the drain hose from the air gap (if there is one) or from the garbage disposer, put it in a bucket and push the Cancel button to initiate the drain. Check if it would drain.

Gene.

Here is the link to your parts
Model GSD5500G00BB

Here is a link which may help
http://www.applianceaid.com/ge-dish.html

Guessing has cost you a fair chunk of change so I would recommend you purchase a multimeter. Have not noticed any comments about a meter reading in your posts so am assuming you do not have one. You can get a decent multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.

You could then attach the leads across your pump motor to confirm that it is not getting voltage when it should.
If there is no volts you can then use it in ohms to check the wires.
Often you will not be able to tell if a wire is broken just by looking at it.
Only things to remember when using ohms is to unplug the unit from power so you do not blow the meter and always unplug one side of any device you are measuring to ensure you are not reading an alternate/parallel circuit path. There is a good sticky about meter usage at the top of this section.

Am not sure if your unit has the flapper valve solenoid (on the pump, front left hand side). If it does I am pretty sure this must pull down (opens the flapper) during the drain cycle for proper draining.

Perhaps Gene or another contributor could confirm this.

Yes it does pump out during a cycle. Even on a light load setting it will wash,empty,rinse then empty again. On pot scrubber it does this a couple times.

You will have to open it up when it does this to check it.
It could fill, then wash, then instead of draining it may fill again till it fills up to the point where the float switch trips, shuts off the water valve and then continues with the wash.

The unit has no way of knowing if it is full or empty, Filling and draining are simply done by time. The float shut off is usually just a safety device.

GE is a royal pain to find wiring diagrams online, I have looked and cannot find a thing. This would be a lot easier with a wiring diagram and timing chart. Though usually they tape it underneath the unit or to the back of the kick plate.

Here is a forum post I found which may help even if it does not look like the same model number
Appliance Tech\'s Private Board >> GE Dishwasher Drain Problems

On most installations I have seen, the installers have left enough slack in the water feed, electrical hook-up, and drain hose to pull the machine out. First, find the circuit breaker for the machine and turn it off. Also, turn the water supply off. Then, after you remove the toe plate (usually held on with four 1/4 inch hex head screws), Remove the trim screws (6 or more) and screw the front leveling legs clockwise (to shorten them). Now you can pull the machine out. If you have a tile or wood floor, you may want to put a towel under the front feet. This will also facilitate the effort of pulling it out.

We have similar dishwasher (GE Quietpower 2 - Model #GLD5560L00SS) and having draining problems as well. Did everything blog suggests and still not draining. Dishwasher is only 2 years + 4 months old. Owners manual NO HELP. I do not want to call in a plumber until I've exhausted everything I can do on my own! PLEASE HELP =) THANKS!!