Location of ECM fuse box 1999 Cadillac seville

SOURCE: fuse box location

I have a '99 Deville. Had the same problem. In the glove box, there are two toggles for Traction Control and Valet. Toggle the Valet one and try the remote on your key or the buttons in your dash.
For mine, someone had engaged the Valet to "ON" and locked out the remote trunk and fuel door.

SOURCE: NEED LOCATION OF THERMOSTAT IN

1. Drain the coolant to a level below the thermostat housing.
2. On some vehicles, access is easier if the front-end beauty panel and the air cleaner are removed.
3. Remove the 2 bolts securing the thermostat housing to the intake manifold.
4. Remove the thermostat housing.
5. Remove the thermostat and O-ring from the housing.

1. Install the thermostat and new O-ring to the housing.
2. Install the thermostat housing to the intake manifold. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
4. Install the air cleaner and beauty panel, if removed.
5. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.

Testimonial: "thanks for the great detailed information-greatly appreciated"

SOURCE: I need fuse box diagram

Goto this website wiring-diagram.com They have full color factory wiring diagrams.
It does cost a few bucks. Not to bad though.

SOURCE: HOW TO DISCONNECT FACTORY ALARM IN A 96 SEVILLE CADILLAC?

get a gun & shoot it .they were a piece of **** when put in. or find someone to install a new alarm.

SOURCE: 1998 cadillac seville STS

on my 1998 Deville its located in the trunk. the panel thats is butted up to the back of the rear seat. look for some black nuts around the top of rim of the trunk, they are about 1'' long, these have to be removed first... good luck.....

Mac.........