Hi, 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/
Take care
For 2002 Chevrolet Truck Trailblazer 4WD 4.2L SFI DOHC 6cyl...
Fig. Accessory serpentine belt routing-4.2L engines
Fig. Accessory serpentine belt routing-4.3L engines
Fig. Accessory drive belt and A/C belt routing-5.3L engines
Hope this helps (remember rated this).
SOURCE: serpentine belt diagram:
if yours has the 3.8L then here is the diagram. Hope this helps
~ Zach
SOURCE: serpentine belt diagram:
The belt routing diagram is located on the top radiator cross member by the hood latch. You should see it when you open the hood. If it is not there, all Chrysler, Dodge, and Plymouth minivans, from 1993 to at least 1999, used the same 3.3L engine setup, so find someone with one and look for the diagram where I described.
SOURCE: serpentine belt diagram
The serpentine belt routing should be labeled on your radiator shroud. Look around the engine compartment like the hood or radiator fram suport and there should be a label with the the belt routing.
Good luck and hope this helps
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