How to replace the belt
Chain.
changing serpentine belt and pulley 90' sedan deville
The 2000 General Motors/Cadillac Deville came equipped in the 4.6L Northstar engine. Removing the main belt will require depressing the tensioner to free it. The new belt can then be routed across the accessory drive pulleys. The OE AC Delco belts for this application are 6K815 and 3K243.
Use a socket and ratchet and place on the 95 Deville's belt tensioner pulley. Pull to the side to release tension on the belt. Remove the belt and replace it, then lower the pulley back into place.
loosen the tensioner bracket, remove old belt. replace with new belt. tighten with tensioner. job complete!
chain
Timing Chain.
Same exact thing happened to my '96 cadillac deville just last week. The belt actually shredded. If you look at the location of the belt (right at the lower right corner of the engine) you may decide you may not want to mess with it yourself. I didn't. I took it in to Firestone and they fixed it parts/labor for $60
The cam on this engine is driven by a CHAIN and not a belt. Therefore, It has no timing belt.
How Do I change the serpentine belt on a 1989 Cadillac Eldorado ?
i am not to keen on thos models but you eather pull back on the alternator or with a braker bar, pull back on the tentioner & hold while removing the belt.