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1993 Buick Century PROM

I know that the ECM is compatible with different types of GM but the PROM is that only compatible with the model of the vehicle or is it specific to the VIN of the vehicle in other words can it come out of the junk yard or does it have to come from a dealer thank you

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Posted on Jan 02, 2017

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SOURCE: 2002 malibu ECM

not bad ecm it has to be programed by a dealership to mach your cars electronics radio,lights,sensors,ect,ect,ect

Posted on Sep 29, 2008

  • 91 Answers

SOURCE: lost my key pleas help

you should put your vin on the net like that, contack gmc and give them your vin and they will give you your code

Posted on May 12, 2009

  • 18 Answers

SOURCE: gm dealers no longer service gm cars 10 years or older

there are many places to get a new button but removng and replacing is as easy as using a needle nose pliers pull the old one out and the new one just pluges right in also here is a link to get your self a new one.


Posted on May 15, 2009

  • 290 Answers


if the prongs don't match;yes. you get the gm numbers off of the ecm, and let them interchange it. then ask to see a picture on the computer to see if it's the same. sometimes they do get boxed wrong.

Posted on Sep 01, 2009

  • 60 Answers

SOURCE: I have Volvo 1993 850 GLT odomters salvaged from the junk

On the right side of the odometer there is a round silver motor that is held on with 2 phillips screws. Remove that and you can access the gear pod and manually spin it to where you need it.

Posted on Oct 21, 2009

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How do you test ecm on a 1992 buick century 3.3 and what is the prom

PROM is the chip in the ECM that controls the functions. ECM units don't go bad that often. First you need to test all the sensors on the engine and the wiring to them. Then you can consider the ECM as being a problem. Dealers have an advantage because they can swap ECM units and if nothing improves, it wont cost you for a new one. However given the age of your car there may not be any ECM units available. Car makers only have to stock parts for 10 years. You can take the ECM off the car and send it into have it tested and repaired by shops that do that or you can search for a used ECM

Oct 22, 2016 | Buick Cars & Trucks

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How to open a hood 1993 Buick century cable jam up

Miguel, 1993 Buick century hood cable broke. With a flashlight, you will have to lay under car and reach up where cable runs into latch and pull the latch mechanism/lever to unlatch hood. If not comfortable doing this call a locksmith and they will have it open in seconds. Check the attached links,instruction and guides, Good luck
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Aug 28, 2016 | 1993 Buick Century

2 Answers

How to replace ecm on 1993 buick century?

remove knee bolster on the passenger side and find the ecm under the dash behind the glove box. some of these you can remove the inner glove box to give you more room. it is held in a bracket that you will have drop down and unbolt the holding fasteners that hold the ecm in the bracket then disconnect the plug connectors to the ecm.

Aug 05, 2014 | 1993 Buick Century

1 Answer

87 Buick century...3.8 well maintained...had in garage for a month...all sensors have been verified..bought new computer and used old proms..still no resolve...finally took to dealer and they said a bad...

I doubt the ECM from a C body would work on your Century. I would probably buy a used computer and prom from a car exactly like yours. The prom is calibrated to the body style, engine, and trans. Each year and model can be different due to emissions standards.

Jul 11, 2013 | Cars & Trucks

1 Answer

Can the transmission from a 1991 Buick century 6 cyl be used to replace the bad transmission in a 1995 century 3.1? The 1995 has a 4spd auto. Or, worst case, would the engine and trans swap from the...

No the 95 is a 4T60E transmission. It's electronically controlled via the ecm on your vehicle. The 91 is a TH440T4.and is not electronically controlled. Transmissions are wired different and will not work correctly due to the ecm controller. Ther are plenty of 4t60e trannys. in the salvage yard as they are used in many larger gm vehicles.

Sep 02, 2011 | Buick Century Cars & Trucks

2 Answers

Where is the ECM located


The ECM is mounted on the right side of the dash above where the passengers feet would be.
The lower panel will need to be removed to see it.
Here is the service manual procedure to remove it.
  1. Turn ignition to "OFF".
  2. Disconnect battery ground cable.
  3. Remove right hand hush panel.
  4. Disconnect connectors from the ECM
  5. Remove ECM mounting hardware.
  6. Remove ECM from the passenger compartment.
  7. Remove ECM access cover.
  8. Transfer PROM unit to replacement ECM. Using two fingers, push both retaining clips back away from the PROM. At the same time, grasp it at both ends and lift it up out of the socket. Do not remove the cover of the PROM. Use of unapproved PROM removal methods may cause damage to the PROM or socket.
  9. Remove new ECM from its packaging and check the service number to make sure it is the same as the defective ECM.
  10. Remove access cover.

There you are. I hope your repair goes well.


Jan 12, 2011 | 1992 Buick Century

1 Answer

Engine hi engine diagnose lite on scantool

ay chek all the ground wires that go to the ecm
chek alterneter and battery
chek ignation module and the knock sensor
every won was good
than ay change the ecm and the problem is over

Jun 20, 2009 | 1993 Buick Century

1 Answer

Where is the PCM located on a 1991 Oldsmobile 98 Regency elite?

The PCMor powertrain control module is only on 1996 and newer cars.Earlier models have a ECM or electronic control module/pcm.You want to change the ECM if its a 1992.Its located under the right hand side of the instrument panel.The ecm has a prom( programmable read only memory)in it.You will need to remove this from the old ecm and install in the new ecm.The ECM/PCM can be used in many different GM vehicles but the prom is very specific and must be used only in the vehicle it was designed.The prom will not come with the new ecm and must be carefully removed and installed on the new ecm.There also is a CALPAK in the ECM ( A devise for fuel delivery) This may come with the new ECM But make sure all parts are the same.You should get a vehicle repair manual to do this job correctly,and make sure you do not damage your PROM.Your PROM is very IMPORTANT!

Oct 21, 2008 | 1991 Oldsmobile Ninety Eight

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