Just bought a used 96 dodge 2500 - took it to the carwash and detailed it out - When i got back the truck I can here liquid sloshing and draining or gurgling in the passenger side of the dash - Is this a common or somewhat common problem? I looked for clogged drain holes under the truck but couldn't find anything - Whats the next step

Thanks

 

Could be a stopped up condenser drain. Blow it out with compressed air and see if water runs out!

 

also check the fresh air duct it might be stuck open

 

thats always fun in the car wash and the ac on wide open isnt it