What kind of coolant goes inside a 1999 cadillac deville base v8

check youtube for videos

http://www.serpentinebeltdiagram.com/wp-content/uploads/Serpentine-Belt-Diagram-For-2000-1999-CADILLAC-Deville-V8-4.6-Liter-Accessory-Drive-00944.jpg

Look for the silly stuff. Check for things blocking off the radiator, coolant level, water pump belt, etc. If none of those help, check the cooling fan, coolant temperature sensor, fan relay and fan fuses. If everything there is working, consider a stuck thermostat, an obstruction in the cooling system itself or a failed water pump. Kind of a long shot but engine timing can also make it run hot. Hope this helps.

Some of them has out side,most is inside.Big job,big money.

Could be a bad water pump,clogged radiator.

CHECK HEAD GASKET.... COULD BE CRACKED BLOCK

The Cadillac Northstar 4.6L V8 is known to chew threw headgaskets because of the head bolts pull out of the block from the threads, the block is not threaded enough to "hold" the bolt under extreme pressure. Many of the mechanics I have known consider it a design flaw. I personally avoid any FWD Cadillac after 1995, the last year of the somewhat reliable 4.9 V8. If you like big American FWD cars, strongly consider the similar Buick Park Avenue, powered by the venerable 3800 V6... after you dump your Cadillac of course.

Besure that you have enough coolant. Your engine has head bolt issues and this allows compression gases into the sooling system, and this pushes coolant out and the heater goes cold before the engine everheats.... VERY expensive to fix correctly. There is a test to determine if exhaust gases are in the cooling system...

it most likely has a 4.6 liter V8 in it

The engine coolant temperature sensor is located on the driver side of the engine near the rear of the engine compartment