2000 Nissan Pathfinder, makes loud squeaking noise while driving between 0-35mph, bought a new timing belt a year ago and had AC belt replaced recently, squeaking is so loud it is almost disturbing to drive at night through town

Common Car Noises and Their Likely Causes Noise More Details Likely Cause Fixing It Clicking noise while turning Starts faint, gradually becomes more noticeable until very loud Failed outer CV joint (constant velocity joint) due to torn boot (most likely) or old age Replace either the whole axle assembly (recommended) or the outer CV joint Water pump noises Difficult to diagnose because of water pump's location Noise usually caused by damage to the bearings in failed water pump Only cure is replacing it. If possible do it at the same time as a timing belt replacement to cut down on labor costs Squeak or squeal from an engine belt Loud, high-pitched squeak or squeal Belts either need adjustment or replacing If belts only squeak when damp, they probably just need adjustment. If they squeak constantly, they probably need to be replaced Exhaust heat shield noises Rattle that you hear when car is idling Damaged heat shield Replace heat shield

Ever check the water pump?

your ignition coil may have already been faulty

Well,a drive belt needs to be replaced every 50,000 mi. or so,and a weak tensioner can allow slack which causes sqeak even if the belt is good.
The idler pulley on those is easy to replace also. If the tensioner isn't holding the drive belt very tighly,replace it and the belt.
Auto Zone will let you put down a deposit and borrow a tool to work the tensioner so the belt can be easily removed. don-ohio

i have 96nissan pathfinder and belt squeaking when i start the engine and stop and start squeaking when iam driving and stop and come back it a new belt

The only cure to fix squeaking belts, is to replace with the new one. When the belts start squeaking noise, then it is the time to check the status of the timing belt or chain, depending on the size of the engine.
The 2000-2004 Nissan Xterra was offered with the choice of 2.4L 4-cylinder or 3.3L V6 engine.
The 2.4-liter 4-cylinder DOHC engine was a pretty good reliable engine, but for this truck, it was underpowered. This engine has a long-lasting timing chain - there is no timing belt to replace.
The 3.3-liter V6 SOHC was also a bit slow on pick-up, but for daily use, it was pretty good, durable, simple engine. This engine has a timing belt that needs to be replaced at recommended intervals. The SE model offered a supercharged version of the same engine with more power.
To get more information, please read my tip :
When should I change the timing belt on my car?
http://www.fixya.com/cars/r6481199-when_change_timing_belt_car

You need a harmonic balance. Very common problem!

Change the belt

well the belt could be loose or the compressor may be seized.....or the belt may be old and squealing.

Theres two belts, I had the same problem, replaced the other one and it went away.