Question about 1991 Cadillac Seville

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The computer system in my 1991 Cadillac seville 4.9 flashed a message system failure and the car started to get hot and I could not access any info by pressing eng data or any other buttons. Does this mean the engine computer is bad.

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And yes there is a way to bypass the chip in the key done it to my 91 Seville been driving it for 10 ys.

Posted on Mar 19, 2014

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 341 Answers

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.
0900c15280090476.jpgThermostat installation—4.6L Engine 0900c15280090477.jpgLoosen the upper radiator hose clamp at the thermostat housing 0900c15280090478.jpgRemove the upper radiator hose clamp from the thermostat housing 0900c15280090479.jpgRemove the thermostat housing retaining bolts and . . . 0900c1528009047a.jpg. . . remove the thermostat housing from the engine 0900c1528009047b.jpgSeparate the thermostat from the housing To install:
  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.

Posted on Nov 27, 2008

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

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SOURCE: How can I bypass a anti auto theft system on my 1990 cadillac seville?

I Have A Seville 1990, When That Happen To Me I Got The Inginion
Replaced Problem Solved. What Is Happening Is Your Key Has A Chip And That Chip Is A Resister And When The Valve Is Not Sented To The Computer It Disengages the Fuel Pump And Than Tells You To Wait. Soon All That Will Happen Is You Will Get The Wait 3 Mins And It Will Never Start, A Good Locksmith Can Take Care Of This For You And That Will Save You Some Money. Cause If You Go To The Dealer Ouch They Will Hit You Up. But I Asure This Is How It Will Happen Cause It Is How It Happen To Me
And Sorry There Is No By Passing The Computer

Posted on Dec 25, 2008

freetek
  • 5568 Answers

SOURCE: 1991 Cadillac Seville wont turn over starter

Have your alternator tested too; if it has a sick diode, it can drain the battery and also shunt current away from the starter as well as damage the battery by applying unrectified voltage on one leg of the output. I replaced SIX (6) Delco alternators in nine years on a car built in '95. It would have been more except the engine failed at 57,600 miles and I junked the lemon.
If the starter solenoid is not integrated on your Caddy, it too can fail which will cause too much lost voltage trying to get to the starter. 

Posted on Apr 14, 2009

honeymokey
  • 3113 Answers

SOURCE: my 1991 cadillac seville will not start

Get a new cylinder put old key with chip in it. Find orange wire from old lock cylinder at bottom of steering column just under dash. Disconnect and connect new wire from new lock cyl. Get a copy of the old key for the old lock cylinder {no chip needed} to start car. Hide or mount new lock cylinder hidden under dash. Remove chip key to activate theft system.

Posted on Apr 15, 2009

honeymokey
  • 3113 Answers

SOURCE: replaced battery now car will not start, service security system message on dashboard info. please help

The car is not reading the key and thinks someone is trying to steal it. Try another key or see a dealer.

Posted on May 09, 2009

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1 Answer

1991 seville needs key code and vat number


you can get that info from dealer with last eight of vin

Dec 26, 2013 | 1991 Cadillac DeVille

Tip

Cadillac service light 1989-01


Eldorado

2000-01

Turn the ignition to ON. Press the TRIP button on the driver information center (DIC) switch to view various menu choices and stop on OIL LIFE REMAINING. A message will display the percentage of oil life remaining. Press and hold the RESET button on the DIC switch for at least 2 seconds. A message will display the percentage of oil life remaining as 99 percent. The engine oil life monitor is now reset. Turn the ignition OFF.


DeVille,
Eldorado


1999

To reset the service Oil Life Indicator, display the
"OIL LIFE LEFT" message by pressing the "INFORMATION SKIP" (skip info) button. Press and hold the "RESET NO" (no info reset) button until "100% OIL LIFE" is displayed.


Deville,
Seville


2000-01

Turn the ignition to ON, Press the INFO button on the driver information center (DIC) to display ENGINE OIL LIFE. Press and hold the INFO RESET button on the DIC until the display reads 100% ENGINE OIL LIFE. The engine oil life index is now reset. Turn the ignition OFF.


Deville,
Seville,
Eldorado


1997-98

Display "ENGINE OIL LIFE" by pressing the "INFO" button. Press and hold the "INFO RESET" button until the message shows 100.


All Models
except
Fleetwood


1994-97

Press the "INFORMATION" button until "OIL LIFE LEFT" is displayed. Press the "RESET" button until "100" or "0.0 OIL LIFE LEFT" is displayed.


Fleetwood


1994-96

To reset "CHANGE OIL" light, turn the ignition switch to the run position without starting the engine. Fully depress and release the accelerator pedal 3 times within 5 seconds.


All Models,
Seville,
Eldorado


1993,
1994-95,
1994-95

The automatic transaxle message can be reset through the following procedure. If "CHANGE TRANSAXLE FLUID" appears on the Information Center, press and hold the "OFF" and "REAR DEFROST" buttons until "TRANS FLUID RESET" appears.


DeVille,
Fleetwood


1991-93

When "CHANGE OIL SOON" light is illuminated, press and hold the "RESET" and "RANGE" buttons on the Fuel Data Center for 5 to 60 seconds. When the buttons are released, the light will flash four times if it has been reset. If the light comes back on for more than 5 seconds, repeat the procedure.


Allante


1989-93

When "CHANGE OIL SOON" appears on the Driver Information Center, press the "RANGE" button until "OIL LIFE INDEX" shows on display. Then press and hold "AVG SPEED" and "RESET" (or "RANGE" on late models) buttons until display shows "100".


Seville,
Eldorado


1992-93

Press "INFORMATION" button on the Driver Information Center until "OIL LIFE INDEX" is displayed. Press "STORE/RECALL" until "OIL LIFE INDEX" resets to 100.


Seville,
Eldorado


1989-91

When "CHANGE OIL SOON" or "CHANGE ENGINE OIL SOON" appears on the Driver Information Center, press "ENG-DATA" button until the "OIL LIFE INDEX" appears. Then press the "ENG-DATA" button and the "RANGE" buttons at the same time until 100 displays (about 5 seconds).





















on Dec 07, 2009 | Cadillac Eldorado Cars & Trucks

1 Answer

How to install lef front window motor in a 1991 cadillac seville


You have to remove the door panel
Remove the Plastic
There will be 2 Bolts that are holding the Glass
4 Bolts hold the Regulator in place
3 screws to remove the Motor.

Do in reverse order

Apr 07, 2013 | 1991 Cadillac Seville

1 Answer

Location of fan sensor/1991 cadillac seville


Not exactly sure, but I might be able to point you in the right direction: Haynes or Chilton's repair manual located at your local library for free check out otherwise around $20 bucks at the auto parts store - great reference to have around.. Alternatively you could GO TO (not call) the parts department at your local dealer, they can pull up a photo or schemata and help you with exact info.
Best regards
Ck

Dec 10, 2011 | 1991 Cadillac Seville

1 Answer

I have a 1991 cadillac eldorado when i try to start it it says starting disabled due to security system failure remove key and wait three min but still wont start


This is a very common GM problem. The anti theft system that is supposed prevent the theft of your vehicle fails and is now locking you out. Go to this site for info and answers that you can do yourself. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Jul 09, 2011 | 1991 Cadillac Eldorado

1 Answer

Starting delayed remove key message appears .


sounds like a pass system code . could be the sensor in the igntion lock

Jun 04, 2009 | 1991 Cadillac Seville

1 Answer

Led display reads starting disabled do to theft system


Yes you can bypass it or replace the ignition lock cylinder. The contacts are bad in the cylinder. Let me know if you want me to tell you how to bypass it.

May 04, 2009 | 1991 Cadillac Seville

1 Answer

1991 cadillac seville will not start


first disconnect the battery and wait ten minutes this will dis able the battery. then get a manual there are several small parts that need to go in a certain way. and for the guy that his car starts then dies sounds like your exhaust system is plugged, simple test disconnect the exhaust just before the catalytic converter and start the engine see it still dies. and the problem isn't even close to the same

Mar 13, 2009 | 1991 Cadillac Seville

1 Answer

My 1991 cadillac seville will not start


Get a new cylinder put old key with chip in it. Find orange wire from old lock cylinder at bottom of steering column just under dash. Disconnect and connect new wire from new lock cyl. Get a copy of the old key for the old lock cylinder {no chip needed} to start car. Hide or mount new lock cylinder hidden under dash. Remove chip key to activate theft system.

Mar 13, 2009 | 1991 Cadillac Seville

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