How do i replace the serpentine belt on my 2005 saturn relay

SOURCE: serpentine belt replacement

You will only need to locate the fan belt diagram to replace it on correctly and a 1/2 breaker bar or ratchet to back off the tension er while replacing belts check the tension-er bearing if it feels ruff when you turn it replace it. Check water pump also to see if it turns smooth same with the alt.

SOURCE: 2001 SATURN SL1 BELT

You'll need a 14mm socket wrench.

Locate the belt tensioner pulley. It's the one closest to the alternator and the only one that comes in contact with the back surface of the belt.

Fit the socket on to the bolt on the pulley.
Try to turn it clockwise.
This should swing the pulley down and loosen the belt,
Slide the belt off one of the other pulleys.
When it's clear, release the tensioner, remove the belt.

Same deal in reverse to replace the belt.

Here's a diagram

Hope this helps

Mike

SOURCE: 2005 chevytrailblazer serpentine belt replacement

is it a I6 or v8?

SOURCE: serpentine belt replacement

there is usually a tensioner pulley that keeps the belt tight. With the correct size wrench you would turn the pulley either cw or ccw (in turning the bolt in the middle of the pulley it will not loosen the bolt but actually relieve spring tension)to release tension on the belt and then remove the belt. be sure to note how it is routed around all the pulleys so it goes back on correctly. keep in mind i don't know what your car looks like but i have never seen a different procedure. i always buy a chiltons manual when i get a car so i have a handy referance for such jobs

SOURCE: saturn 2001, serpentine belt diagram

for the most part there is a diagram under the hood unless the label has peel off in a case like that you can ask for a diagram were you are getting the new belt what i do is draw me a diagram before i take the old one off and i have also went to the libaray and there you can get print outs and diagrams of your car.