2008 GMC acadia has water leaking from sunroof , how do i fin the drain hose?

The first thing to do is have the battery tested and the battery charging system (the Alternator)

The AC box that contains the Evaporator core is not sealed properly, or the drain is clogged again. Check the drain again, it exits under the car on passenger side base of engine bulkhead.

Floorboard is wet because the drain from the A/C Evaporator is plugged up with "gunk" Need to find the drain and clean it out.
For a 2008 the Battery has used up it's 60 month life and you need a new one

A very common issue on the 3.6 liter V6 engine in the acadia is a leaky water pump. The pump starts leaking, causing a low coolant level, causing the engine to go into reduced engine power mode to keep the engine from overheating. This usually results in a very extensive cylinder head gasket repair job. You should have a local shop perform a cooling system leak check to find the leak for sure, and an engine block check to see if the overheat condition caused internal engine damage.

your negative wire or posetive sumwhere is rusted and will not let the current pass through

first find and fix the leak then add the gas through the suction line to the compressor
better still have an accredited ac shop do the job

If you use a guitar string to run down the drain hole followed by compressed air, you should be able to clear the clog.

{: ) The drain hose is just near to the right of the gas pedal, but is being covered by the center floor console. You need to remove only the side trim panel, which is supported by 3 clips from inside.
To give you an idea how to remove that side panel, first move the driver seat maximum rearward. Remove all the extra floor mattings on that area. About 1 foot away from the pedal. grasp the lower edge of the trim panel and pull. You may hear or feel the first clip snap out. These clips are normally seated about 3/4 inch depth.
Next, move another foot away and position your hands again to snap out the second clip. The third clip is alittle above it. At this point, you may be seeing some clearance at the upper edges of the panel. Work your way from there. You can apply some flexing maneuvers.
When you're successful, you can then proceed with pulling and cleaning of the drain hose. Check also if the drain pipe from the HVAC housing is clogged.
A clogged a/c drain system will not only wet your floor, but it can also damage your blower motor, leaving it stucked or noisy.

Well someone has to figure out by looking at the car whether this is a slow leak to the outside or a much worse slow leak into the lubrication or combustion areas of the engine. Coolant is very bad for internal hard surfaces so get it done ASAP.

how do you change the low beam light bulb on the 2008 gmc acadia