It is in the air intake box at the front of the car.....one of the easiest PCM's to get to, but no GM dealer seems to want to tell you that.
The Powertrain Control Module (PCM) on a 2001 Buick LeSabre is typically located on the driver's side of the engine compartment. It is mounted on the firewall, near the brake booster. To access it, you may need to remove some components or covers, as it can be somewhat tucked away. Always consult the vehicle's service manual for specific details and safety precautions before attempting to access or replace the PCM.
The PCM (or ECM) is located on the interior of the car on the passenger side. To access the PCM/ECM remove the kick panel just beneath the glove box and it is right there. Disconnect the three electrical harnesses and and sucuritity clip and it's out.
its beyond of the air filter.
On the dashboard
Yes the ecm( engine control module)/ pcm( powertrain control module) are the same thing. Different manufacturers use different acronyms, ECU (engine control unit) is another often used.
Powertrain Control Module (PCM)
its on the passanger side fender
Under the dashboard , behind the glove box, passenger side.
The PCM is located under/behind the dash on passenger side of vehicle. It is very near the passenger side door.
inside the air filter housing
The Powertrain Control Module (PCM) on a 1998 Buick Riviera is typically located under the dashboard, on the driver's side. It can be found mounted to the bracket on the side of the vehicle's interior, near the steering column. Accessing it may require removing some panels for better visibility and reach.
If you are talking about the engine pcm, is located on top of the engine on the driver side.