Two months ago I bought a 1990 DeVille with 21k on it. Here's what I did:
The Vogue tires were okay for tread, but heavily cracked, so I replaced them.
Brake system flush.
One front strut was weak, so I replaced both.
Transmission drain/refill (not flush), gasket and filter.
Installed a Prestone kit and flushed the cooling system.
Sucked out the PS fluid and replaced, several times (not really a flush).
Oil and filter change.
New plug wires.
Inspect belts, hoses and vacuum lines very carefully. I disconnected and reconnected every electrical connector I could find on the car - if you're a nut like me you will use DeOxit on the connector metal. Make sure all rubber seals (around doors, engine compartment, trunk) are properly adhered. I re-torqued everything I could reach easily, under the car and in the engine compartment. Check the exhaust system rubber hangers, engine and trans mounts, for separation.
I then eliminated every rattle and squeak - the car is now totally silent over bumps, etc.
Go to eBay and buy the correct shop manual - it's a huge book in a red cover. I paid $25 or so, including shipping.
If you have any questions, pm me and I'll try to answer.
The Vogue tires were okay for tread, but heavily cracked, so I replaced them.
Brake system flush.
One front strut was weak, so I replaced both.
Transmission drain/refill (not flush), gasket and filter.
Installed a Prestone kit and flushed the cooling system.
Sucked out the PS fluid and replaced, several times (not really a flush).
Oil and filter change.
New plug wires.
Inspect belts, hoses and vacuum lines very carefully. I disconnected and reconnected every electrical connector I could find on the car - if you're a nut like me you will use DeOxit on the connector metal. Make sure all rubber seals (around doors, engine compartment, trunk) are properly adhered. I re-torqued everything I could reach easily, under the car and in the engine compartment. Check the exhaust system rubber hangers, engine and trans mounts, for separation.
I then eliminated every rattle and squeak - the car is now totally silent over bumps, etc.
Go to eBay and buy the correct shop manual - it's a huge book in a red cover. I paid $25 or so, including shipping.
If you have any questions, pm me and I'll try to answer.