I am looking for a belt routing diagram for a 99 chevy tracker..

https://www.bing.com/search?q=2001+chevrolet+tracker+belt+routing&PC=U316&FORM=CHROMN

go on the internet for your car and ask the question you should be able to find a diagram that shows the routing.

Open the hood and locate the accessory belt routing diagram that is stamped to the top flat surface of the radiator shroud. Use the routing diagram to properly route the new belt around each accessory pulley.
Look on the front of the engine between the alternator and the power steering pump and locate the automatic belt tensioner. Use the pulley that is attached to the end of the tensioner to loosen the tension from the belt.
Position a breaker bar and a 14 mm socket onto the bolt head in the middle of the tensioner pulley. Turn the breaker bar clockwise to loosen the tension from the belt. Slide the belt off of the tensioner pulley and slowly release the breaker bar.
Slide the belt out from around all of the engine accessory pulleys. Pull the belt around each of the fan blades and up out of the engine compartment.
Slide the new belt around each of the fan blades and around each of the accessory pulleys as directed by the belt routing diagram.
Turn the tensioner clockwise with the breaker bar and the 14 mm socket again. Slide the belt around the tensioner pulley and slowly release the breaker bar. Pull the breaker bar and socket off of the tensioner and out of the engine compartment.
Crank the engine for ten to fifteen seconds to finish seating the ribs on the inside of the belt to the grooves of each accessory pulley. Turn the engine off.

Hi You can go to www.autozone.com and sign up for my zone (my zone is free).thay have repair guides with belt routings.hope this helps.Thank You for using fixya iluv2fish......Ray......

OK.
If your idler pulley is bad then unbolt it and while you're at it replace the power steering belt.

REMOVAL & INSTALLATION Because serpentine belts use a spring loaded tensioner for adjustment, belt replacement tends to be somewhat easier than it used to be on engines where accessories were pivoted and bolted in place for tension adjustment. Basically, all belt replacement involves is to pivot the tensioner to loosen the belt, then slide the belt off of the pulleys. The two most important points are to pay CLOSE attention to the proper belt routing (since serpentine belts tend to be "snaked'' all different ways through the pulleys) and to make sure the V-ribs are properly seated in all the pulleys. Although belt routing diagrams have been included in this section, the first places you should check for proper belt routing are the labels in your engine compartment. These should include a belt routing diagram which may reflect changes made during a production run.

1. Disconnect the negative battery cable for safety. This will help assure that no one mistakenly cranks the engine over with your hands between the pulleys, and that the cooling fan cannot activate while servicing the belt(s). NOTE: Take a good look at the installed belt and make a note of the routing. Before removing the belt, make sure the routing matches that of the belt routing label or one of the diagrams in this book. If for some reason a diagram does not match (you may not have the original engine or it may have been modified), carefully note the changes on a piece of paper.
   
2. For tensioners equipped with a 1⁄2 in. (13mm) square hole, insert the drive end of a large breaker bar into the hole. Use the breaker bar to pivot the tensioner away from the drive belt. For tensioners not equipped with this hole, use the proper-sized socket and breaker bar (or a large handled wrench) on the tensioner idler pulley center bolt to pivot the tensioner away from the belt. This will loosen the belt sufficiently that it can be pulled off of one or more of the pulleys. It is usually easiest to carefully pull the belt out from underneath the tensioner pulley itself.
3. Once the belt is off one of the pulleys, gently pivot the tensioner back into position. DO NOT allow the tensioner to snap back, as this could damage the tensioner's internal parts.
4. Now finish removing the belt from the other pulleys and remove it from the engine. To install:
   
5. While referring to the proper routing diagram (which you identified earlier), begin to route the belt over the pulleys, leaving whichever pulley you first released it from for last.
6. Once the belt is mostly in place, carefully pivot the tensioner and position the belt over the final pulley. As you begin to allow the tensioner back into contact with the belt, run your hand around the pulleys and make sure the belt is properly seated in the ribs. If not, release the tension and seat the belt.
7. Once the belt is installed, take another look at all the pulleys to double check your installation.
8. Connect the negative battery cable, then start and run the engine to check belt operation.
9. Once the engine has reached normal operating temperature, turn the ignition OFF and check that the belt tensioner arrow is within the proper adjustment range. Fig. 1: Often the underhood label will display the serpentine drive belt routing
   Fig. 2: Relieve the belt tension by pivoting the automatic tensioner away from the belt, then remove the belt
   Fig. 3: Verifying serpentine belt alignment in the pulley
   Fig. 4: Fig. 1 Accessory V-belt routing — Tracker 1.6L engine with A/C
   Fig. 5: Fig. 2 Accessory V-belt routing — Tracker 1.6L engine with A/C and P/S
   Fig. 6: Fig. 3 Accessory V-belt routing — Tracker 1.6L engine with P/S
   

Thats a 98 belt routing same engine. 99 wouldnt load

For the 2000 Chevrolet Tracker:

Most modern vehicles have the Belt Routing Diagrams on the undeside of the Hood. But the sometimes disappear.

I do not know if you have the 1.6L In-Line 4-Cylinder, or the 2.0L DOHC In-Line 4-Cylinder. Nor what Engine Options you have (AC/No AC, etc.).

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/2000/make/chevrolet/model/tracker/2000_chevrolet_tracker_drive_belt_routing_diagram.htm

First, keep this diagram around as you will need it to route the serpentine belt when you reinstall it. There may also be a diagram under the hood by the radiator.
Next, follow this link and watch the video that shows you how to replace a serpentine belt...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/

This is a view of the correct belt routing ..

isnt the diagram in front of the car by the radiator? Also you can ask someone to take you to peboy,autozone or advance auto and quickly look at the book. camera phone can take picture of belt diagram