Hear a gurgaling noise from the lower front passenger area when I first start moving forward

If you have access to a lift put it on and look at the area where the noise is coming from if you have a small camera try and put it somewhere you may be able to see what it is doing.
Good luck.

some mechanics are jerks and just want money does it clunk when you take off ?

Have you checked your intake cam. Mine started clicking when my cam got wiped.

normally the seat tracks are bolted to the floor or riser. It is possible that when the seat was moved forward the track moved over the head of a mounting bolt and will not return. check for interference between track and rail while trying to return seat.

use the buttons to move it back but shake the seat side to side. sounds like your track on the seat has gotten in a bind with the one on the floor. just wiggle and jiggle till it starts to move and dont go all the way forward in the future

its may be the passenger seat belt warning device

Hello. Welcome to FixYa! Please allow us to assist you.

The procedure is as follows, to remove the spare tire from a 2WD Sienna:

Move the passenger seat as far forward as possible.
Move the passenger side middle seat back as far as possible.
Obtain your tire tool (the one you would use to remove the lugnuts)
Observe the carpeting behind the front passenger seat; you will see a small piece of carpet, like a small 'flap', that can be raised.
Under this flap is a small silver 'bolt'. Fit the lug wrench onto this bolt, and rotate it. This will lower the cable that raises the spare tire up under the area between the passenger front and rear seats.

Note: 4WD Siennas do not have any spare tires, as they came with 'run-flat' tires. Toyota did not fit a spare on the 4WD units.

Thanks for choosing FixYa for assistance today.

could be cv booth starting to worn out

if the noise only happens when the vehicle is in motion...check the front suspension. place the jack under lower control arm ,then get a bar and lift up on the tire..ball joint issues are well known in blazers and cause this condition. if it does the rattle noise when its idling and to op temp--could be the cat converter causing the noise on pass side directly under passenger seat. when cold, smack the cat with rubber mallet and if any rattle is present, cat should be replaced so it dont cause further damage .hope that was helpful !!

You need fluid!! The high pitched noise yu hear is air in the hydraulic sections of the transmission. Top up the fluid then find out where the leak is
Good Luck