What type of ATF should be used for a 1993 buick regal

Hope this helps.

Use a bottle of yellow HEET dry gas to remove any moisture problem in the fuel.

Clean / replace air filter.
Check ATF at level ground. Top off to MAX level.

Use starting fluid to aid starting.

The fans are controlled by the ECM and it uses the ECT sensor for temperature sensing, so if the check engine light isn't on the sensor is not the problem. You need to have an active test run on the fan system to see what code is returned. Have you tried powering up the fans at the relay?

If you have to ask that question, you don't have the equipment, (gauges, etc) to be able to safely recharge your AC circuit in your 1993 Buick Regal!

Sorry to be blunt, but you could cause more problems than you would fix if you try to do it yourself.
Do you know what freon is in the system now? You have to recharge with the same type and since you have an older car you probably have old type in it, which means you have to evacuate the system and capture the freon (and dispose of it) and then recharge with the right amount of new type freon.

On this website you find fuse box diagram and description for Buick Regal (1988 - 1993)


Buick Regal mk3 Third Generation 1988 1993 fuse box diagram Auto Genius

I looked at a auto parts store website and the same two years Buicks take the same radiator hoses so they have to be the same configuration

Use what ever brand you like,but the type would be 10w 40 ,or 10w30.either one,winter cold use the 10w 30,and the hot summer,use 10w 40.

try replacing the O2 sensor as this will cause that type of problem.

tuck it back under the vehicle and use some wire ties to keep it in place.

try www.autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you or you can try www.schramauto.com or call them at 1-800-292-1032