2002 buick lesabre pcm location? where can i find it and how hard will it be to change it out

Question edited for clarity.
Question moved to model category.

2000 Buick Lesabre Car Stereo Wire Colors and Locations

the12volt.com https://www.the12volt.com > installbay > stereodetail
2000 Buick Lesabre Stereo Wiring ; Constant 12V+, Orange ; Switched 12V+, Yellow ; Ground, Black/White ; Illumination, Gray/Black ; Dimmer, Brown/White.

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Question edited for clarity 'modular' to module'.
Question moved to model category

It is in the air cleaner box. What do you intend to do with it. Any work with transmission needs diagnosing electronically. A professional grade bi directional scan tool is the answer to this. It can operate the transmission solenoids and verify that they are operating,

https://www.google.com/search?q=mobile+auto+electrician+near+me

Location

https://www.google.com/search?q=2001+buick+lesabre+transmission+control+module+location

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https://www.autogenius.info/buick-lesabre-2000-2002-fuse-box-diagram/

Strange locations.. under the rear left seat for the one.

Do you know where the connector at the EGR valve is ? Has five wires . Pin C - brown wire is Pintle position signal to the PCM - engine computer . Do you know where the PCM is located on the vehicle ? Connector 2 pin 65 at the PCM is the other end of that circuit. The PCM supply's a 5 volt ref. voltage to the EGR at pin D gray wire . Sensor ground pin B - black wire . Connector 1 pin 58 at the PCM . Videos on youtube on how to test .

PWR WDO - 30amp circuit breaker , DRV -MDL 10amp fuse - both are located in the rear fuse box .
Fuse Block Rear
Under the left side of the rear passenger compartment seat

You have a misfire ,spark plug ,coil etc. .. the flashing check engine light is to warn you that the misfire is severe enough to damage the catalytic converter ! You need to take it to a repair right away ! A new catalytic converter can cost as much as $1,000 . The shop will check the code's in the PCM . this will tell them what cylinder is misfiring !

The PCM can be cleared/reset by either using a scan tool or by disconnecting the battery negative cable for 5 minutes.

It is located in the Passenger Compartment(inside vehicle), Lower RH Front Corner





REMOVE OR DISCONNECT

• Disable Supplemental Inflatable Restraint (SIR) system.

1. Powertrain Control Module (PCM) connectors.
2. PCM.

• Pull bottom of PCM rearward over locking tabs and downward to remove.

INSTALL OR CONNECT

1. PCM into bracket, making sure PCM is up over locking tabs and locks into place.
2. PCM connectors.

• Enable SIR system.

The fuel lines are steel except for the plastic ends where they need to be flexible for the push-on type connectors. If I am right, those plastic ends pass just under your cabin air intake. Just below that, is a common bend where the steel lines usually rot. If you have high miles they may be baked, or if you had recent engine work they may have been flexed to one side hard enough to split one the three. If one is leaking it is best to replace them all. Don't take chances with gas fumes or leaks. Do it right away!

ICM is under the coil