Im pretty sure its under the back seat!!!!
Yes, it's the same size engine the sts just makes more hp(300) then the sls(270) engine, should drop right it
7 qts for the 4.6 L Northstar engine
If all the gauges in the clustor are working and only the speedometer is not, I suspect the Vehicle Speed Sensor which is located in the transaxle. Easy to replace and only about $15. http://www.partstrain.com/ShopByDepartment/Speed_Sensor/CADILLAC/SEVILLE/1999
most like you will have to replace the fuel pump in the fuel tank.
Disconnect the negative cable first and connect the same negative terminal last when installing the new battery.
what is the switch located in the battery tray on a 98 jeep wrangler
http://www.cadillacforums.com/forums/cadillac-catera-cimarron-forum/67854-98-catera-crankshaft-position-sensor-replacement.html
On the expansion tank, on the right fender wall.
Follow the positive battery cable from the battery, it will lead you to the starter.
There was no rwd Cadillac Fleetwood in '98
It's under the back seat. Just grab it firmly under the lip and jerk up.
How do I replace the heater core in my 98 cadillac deville