20 Most Recent 1998 Cadillac Seville - Page 5 Questions & Answers

They sell the repair kits at any auto parts store, it just bolts on.

You mean the number on the top (10, 15, 20, etc)? If so it doesn't matter which way the fuse is installed. It work work in either position. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com! I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

You mean the number on the top (10, 15, 20, etc)? If so it doesn't matter which way the fuse is installed. It work work in either position. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com! I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Your car probably has the 4.6 northstar. If this is the case the thermostat is in the water pump housing at the drivers side of the engine. follow the lower rad hose to the pump housing and its contained in a black (2 bolt 10 mm) housing.

if it was done at a GM dealer (reprogramed) it should be ready to install. if not it may not operate.

remove rear seat cushion to be able to lift carpet for inspection. if its wet under carpet,the entire carpet will need to be removed for inspections and to dry out. many electrial connection are under carpet. i have dealt with these type of problems before in cadillacs. also check in spare tire well for water if carpet is wet.to further help the concern you may need a techII scan tool and or wiring diagrams specificly for your vehicle. good luck!

check the lt blue wire at upper lamp,(under trunk lid trim panel) for 12 volts when brake is applied. if no voltage,check same color wire at brake lamp switch for voltage.(by brake pedal).if no voltage replace stop lamp switch asm. if voltage is detected at rear by lamp then replace CHMSL asm.(center high mount stop lamp). this lamp is made of many LED's,if some work and some don't you will need to replace lamp asm. can be repaired by a trained GM tech, possibly. there is no seperate fuse or relay for this lamp,only a stop lamp fuse.

Yes there can be, depending on which chip you get. Most chips do the same things which is advance the timing and add additional fuel to richen the mixture and adjust the injector pulse width for more output. In most vehicles the manufacture reduces the HP to meet emissions standards and increase efficiency of the car. Example a motor that makes 400 hp may be reduced to 300 for efficiency and fuel economy also for reliability and longevity. I wouldn't go with a no name chip for something as they usually don't do the research a larger company does and most name brand companies will give you the HP and still keep your motor running within normal tolerance without maxing out the vehicle and making it unsafe. Do your research and google the chips and see if there are any real users using it and what they think about it.

sounds normal to me.does it shut off after turning off ignition and closing all doors? if it does that is normal operation.

u have a problem in the abs system can be anything from a disconnected sensor wire to a bad sensor first look at the wiring for damage or a disconnected sensor they are located behind wheels -an electrical wire running to the back of rotors if wiring looks good have car scanned for trouble code most auto stores [advanced auto,auto zone ,etc..]offer this service for free the code will pinpoint the trouble location so a repair can be made

Its not very hard to replace battery. Open the hood to access the engine compartment. The battery will be located at the front of the motor, next to the radiator.The battery has two terminals, red and black.Both are attached with nut bolt.You will need to loosen the nut and disconnect the two terminals.Then lift the battery out. --------- This will help.Thanks.Helpmech.

Your engine has 3 O2 sensors: one in the collector section of each exhaust manifold and one just after the catalytic convertor (the one up above the riveted heat shield). So you have two sensors upstream of the cat and one downstream.

DTC P0446 - Evaporative Emmission Control System Vent Control Circuit
Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test. A code P0446 could mean one or more of the following has happened:

• Faulty vent valve
• Open, short or excessive resistance on Vent valve control circuit
• Blockage of vent valve
• Bad PCM

Possible Solutions

• Replace Vent valve
• Repair open, short, or resistance problem in control circuit
• Repair open, or short, or resistance problem in power circuit
• Replace PCM

DTC P0452 - Evaporative emission control system, pressure sensor low imput
DTC P0453 - Evaporative emission control system, pressure sensor high imput

The PCM monitors the EVAP control system FTP sensor input signal to the PCM. The test fails when the signal average jumps above a minimum allowable calibrated parameter. If both codes are present, it sounds like your fuel tank pressure sensor has failed.

The sensor is on top of the tank and you will have to remove the tank. But your symptoms are pointing to more than just the sensor. You may have wiring problems.


Hope this helps (remember to rate and leave a comment about this free answer).

Hello: All Cadillac Devilles had a Northstar starting in 1996. It will not make any difference if it is a SLS (275 HP) or a STS (300 HP)

Base on past experience,this is an ignition switch issue.
This special switch control the following items:
Door lock, turn signal, ignition, trunk, windshield wiper, multi-function and many more.
====
ACDelco 10467473 Switch Assembly The price is $75 +

Try disconnecting negative terminal of your cars battery for 10 minutes.Then reconnect the negative terminal and see if that resets the system and all lights turn off.--------- But if this is not helping them , you will have to get the car scanned.This lights are coming on, because there is error code stored in your cars computer module.---------This lights not turning off, this is indication to get car scanned.------ At autozone service center its absolutely free to get car scanned. They do it absolutely free.once the error is scanned, it will point towards the parts causing this lights to come on.So as per that you can get the parts checked and replaced.-------- Also if there is no autozone service center near by then you can get it scanned at local car garage or auto part store, who has obd2 scan tool.-------- It can be anything like faulty abs sensor, abs module, loose wiring to module,problem with brake,etc etc.But once error code is retrieved, it will directly rule out other possibilities and give exact possibility for this lights remaining ON.---------- This will help.Thanks.Helpmech.

Hi geofitzpat,
I need a little more info.
Do the switches on the passenger side work?
Are the windows and door locks both inoperative ? How about a electric mirror control?
Did the switch get wet ( as in rained on ) ?
Is everything else OK?, starts good, headlights are bright? Let me know.
Regards, P.

• Yea you have 3 of them actually. Funner to remove than install but overall not a hard job. You pull one out and then another drops down etc.
• Location is above the gas pedal and over about half a foot.
• See diagram as well.

• If you have any comments feel free to leave them here and I will respond.
• Hope this helps and thank you for using FixYa.

Regards, Tony