Need to see belt diagram for 91 chevy lumina euro 3.1

Chevrolet lumina euro have a catalitic converter Teena, Yes. Check the attached links, Good luck
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http://www.autopartswarehouse.com/shop_parts/catalytic_converter/chevy/lumina.html?redirect=1

RockAuto Parts Catalog

If you raise the hood the belt routing should be on a diagram on the radiator support. It is across the front of the car. If not you can Google a diagram.

check the computer on the car it happened on our 91 chevy lumina euro and when we changed it it fixed the problem

http://www.mvreader.com/multiview/dayco/zoom.php?zoom_item=C0001J&l=&catalog=auto&category=2

The web link should take you to a diagram of the serpentine belt. Hope it helps!

Here's the diagram you asked for...

Had fule pump and filter replaced, 3 months later, same problem, car will not start, replaced Relay Switch, still wont work. any suggestions?

if you join autozone.com for free they will have all of your diagram and schneeds for free

Chevy cheeped out and has been using aluminum rivots to hold the motor in place. to remove the motor remove the rivets.

1-2-3-4-5-6 firing order( belt end looking toward trans axle ) first on left (1) (2) on right(3)on left and so on

I found on my 92 lumina 3.1 the easiest way to change the belt is to have two people handy (you and a helper) push the belt tensioner (which is more in the middle of the belt system, its the only thing that has give when pressure is applied) down (which will loosen the belt) have your partner slip the belt off the altenator (which should be on the very top of the belt system on the passenger side) and just pay attention to the way the belt is routed as you remove it, put the new one on (routed correctly) push the tensioner again have your partner slip it back over the altenator....and you have a new belt on with no tools :)

just pay good attention to the routing of the belt, and i also think there is a black cover over the belt which needs to be removed before the old belt can be taken off (if you dont see it at first you will find it) it has 3 bolts i think and also a diagram of the routing....

TIP: the tensioner will take some muscle to move down, and yes the belt is running over it....