1999 Cadillac Seville STS - Answered Questions & Fixed issues

Look at the transmission control module and/or the shift solenoids inside the transmission.

is it supposed to go in and out if so it probably is rusted in place take it to an accredited service shop for repair / replacement

Battery , battery cables to starter solenoid and to the under hood power distribution center (fuse box) . Should have a B+ cable from battery to fuse box . Use a DVOM - digital volt ohm meter . Find a wiring diagram for power distribution at http://www.bbbind.com/free_tsb.html also watch videos on basic automotive electrical testing on youtube .

Anti-theft system transceiver ? Theft Deterrent System The Theft Deterrent System on this vehicle is comprised of two separate systems, the Personal Automotive Security System (PASS-Key?® III) and the Content Theft Deterrent (CTD) system. These system are described and diagnosed separately within this section. For CTD operation, refer to Content Theft Deterrent (CTD) Description . SECURITY Indicator The yellow indicator SECURITY on the instrument cluster is controlled by both the PASS-Key?® III system (VTD module) and the CTD system (RIM). ?€¢ PASS-Key?® III system, the VTD commands the instrument cluster to control the indicator only when the ignition switch is ON.

?€¢ CTD system, the RIM commands the instrument cluster to control the indicator only when the ignition switch is OFF. PASS-Key?® III System The PASS-Key?® III system is designed to help prevent vehicle theft by disabling the engine unless an ignition key with a specific electrical value is used in the ignition lock cylinder. The PASS-Key?® III system operates independently of the CTD system. Protection is provided even if the CTD system is not armed. The components of the system are the ignition keys (black or gray), ignition lock cylinder, Theft Deterrent (VTD) module, Reader Exciter, Powertrain Control Module (PCM) and two starter relays (START 1 and 2) in the underhood fuse block.

Not really enough info but it sounds like you're multi switch in the steering column may have a problem if it is a GM vehicle

Check that your brake lights are working, they must for gear to be engaged. Also, it might be a gearbox issue. Matbe the selector has gone wrong. If it is staying in only one gear, are any of the lights on the dash illuminated that were not so before..

Your vehicle has 2 catalytic convertors. The replacement used should be one made expressly for your vehicle. Cahoots told you that a convertor is defective? You may only need an O2 sensor.

take it to monroe muffler or a mechanic, Search from over 10 Million Auto Parts

You need to remove the Glove Box first. Open the Glove box, there are usually three screws at the front bottom of the box, and two at the top. Gently pull the whole box forward and turn/pivot the box to the left. There will be some plug-in wires you need to disconnect... don't worry they only connect a certain way. Your box should be free now. You'll need to remove the screws (usually four) on inside door plate to detach the door stops (those curved parts). On the bottom front of the box you should find the screws that attach the door, via the hinges, to the box. Assembly is just the reverse order. It's not a quick process... so take your time.

Okay, I'm confused. Are you hoping that it does die?

Could be bad start or ignition (EFI) relay.

seats are electric heat check connection under seat or possible fuse for pass. seat?

I have run into this. Some one at some point has put the wrong filter on. You will have to get one of those plastic line removal tools and cut it. You need to cut off the semi circle pieces to shove into the line fitting. Take the pieces and show them into the fitting. You will need a couples of angled Picks to get them all the way in to release. You will also need three hands to make it a bit more easier. They su(k at best, but it can be done. Be sure to get the right filter. Or look and get one with a long nipple on each end..The nipple is about 2 inches long on both ends...

should be behind the front bumper on the engine of course...

followthis link to a caddy forum for expert advice and tips 1999 STS security problem

A blown head gasket or intake gasket does not always put coolant into the oil or produce smoke.. If the gasket blew between an oil vein and coolant vein then there is a possibility that your actually pushing the oil into the coolant side.. When the car is cool... look at your antifreeze and see if it has the oil slick look to it.. That being said it could be a head gasket or it could be in the intake as well..

i would have to say ck. the easast things first,when was the last cooling system flush making sure all cooling system parts are clean and new coolant added(old coolant looses its abilaty to work properly when old)then have the thermostat ck to make sure it opens and closes at the proper temp.

check the fuses should be 25 amp

Sounds like you should replace your starter solenoid or have it checked for proper activation, when this happens if you raise the hood Tap it with something solid like a screwdriver handle sort of hard then try to start it if it does crank you have found your problem. Remember we are all volunteers here on FixYa and work jobs too. So your answers may not come as fast as you like please be patient. Please do not post another question for the same problem trying to get a faster answer it will only confuse this issue. Thanks in advance please remember to rate and leave testimonial for us it is how we earn our achievements here on FixYa we do not get paid for helping you thanks.

Just google "GM Drive Cycle"