20 Most Recent 2005 Cadillac Seville Questions & Answers

the car is telling you that it is DUE for a service SOON.

To confirm whether or not this is from some drips at the gas pump, you can turn the car on and watch the cap. You may be able to observe it pushing out air. In this case you should replace the cap and/or clean any rust and dirt from the filler neck so it can seal properly.

It's under the hood it's a snail like thing (curled with an opening) if it still works have someone honk it while you look you should find it, if it doesn't work it's usually in the very front of the car around the headlight area

there is a lose wire

put a new gas cap, those system are pres. even if
the cap look ok it maby leaking replace with a new
one it should solve your prob.
eng.ligh come on because of the gas cap

4.5 And 4.9L Engines

1. Remove the air cleaner.
2. Remove the TP sensor connector.
3. Unscrew the 2 TP sensor attaching screws and retainers, and remove the TP sensor.

To install:

1. With the throttle valve in the normal closed idle position, install the TP sensor on the throttle body assembly.
2. Install 2 TP sensor attaching screws with retainers. Do not tighten the screw until the TP sensor is adjusted.
3. Install the TP Sensor connector. Adjust the TP Sensor and perform the idle learn procedure.
4. To Perform the TP sensor adjustment.
   1. Disable the generator by grounding the green harness connector plug adjacent to the generator.
   2. Start the engine, enter diagnostics, and select PCM override PS103 'ISC Actuator'
   3. Press the 'COOLER' button on the CCP to retract the ISC Actuator. This action will disengage the A/C compressor and command the EGR 'OFF'. The Climate control center display will change from '50 to 00'. The ISC Actuator will slowly retract (about 20 seconds) to a fully retracted position. Verify that the throttle lever is resting on the minimum idle speed screw. With the ISC Actuator plunger fully retracted, disconnect the ISC harness.
   4. Select the PCM data PD01, 'TP Sensor', while still in PCM override PS03. Note the throttle position (in degrees) displayed on PCM parameter PD01.
   5. (-0.5° TO + 0.5°) No TP sensor adjustment required. Reattach the ISC Actuator harness and disconnect the grounding wire at the generator.
   6. TP Sensor (-10.0° TO -0.6°) or TP Sensor (+ 0.6° TO + 90.0°) TP Sensor adjustment required.
5. With the engine 'OFF' and the ignition 'ON', reenter diagnostics and select PCM override PS03 'ISC Actuator'. Press the 'COOLER' button to retract the ISC Actuator the minimum air setting.
   1. Loosen the TP sensor screws just enough to permit the sensor to be rotated. Open the throttle slightly and allow the throttle lever to snap shut against the minimum air screw. Adjust the TP sensor so the parameter display is 0°. Tighten the TP sensor mounting screws with the sensor in the adjusted position. Recheck the parameter to be sure the TP sensor parameter is (-0.5° to + 0.5).
   Install the air cleaner.

on brake pedal bracket under dash disconnect wiring remove switch -replace

their is none

your damper control has a problem

Videos and text based articles. They are nearly always to the left and right of the centre console under the dash. https://www.google.com/search?q=1994+cadillac+seville+sts+replace+blend+door+actuator ..

Could be the interlock brake switch . don't guess an just replace parts . You don't know how to test , take it to someone who can .

The Haynes repair manuals are very good about showing the wiring diagrams for all wired connections. You can go to or contact the dealership and ask if they have one for free. Most wiring diagrams are going to cost if you have lost your owners manual.

that is what I would look at especially if have to make up coolant level

This series of videos should help you... you can jump by clicking on the small screen shots to the right. Transmission Fluid Level Check Cadillac Seville 1998 2004 2003 Cadillac... Transmission dipstick is under the air intake and is a black plastic plug that unscrews the arrow in the photo shows the general area ..lift off the air intake for access.

The best solution you'll get from books at www.reliable-store.com These are books containing info on repair, service, troubleshooting, par ts info, assembling dissemble, removal, error/fault codes, wiring diagrams and everything on any vehicles cars, atv, trucks. forklifts, boats, excavators etc

You should check out www.reliable-store.com they have info on repair, service, wiring diagram, electrical diagram, fuse diagram, troubleshooting, PCV, owner's/service/repair/parts manual, fault codes, error codes, etc everything on all vehicles. must check it out

Most likely coolant sensor.

Replace the faulty switch.

What year is the vehicle ?

Does sound like fuel related change filter see if helps also check all tune up items