Removal (2.2L)

WARNING: This page is about a different car, the 2003 Pontiac Grand Am and 2003 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) is located behind left front kick panel. See Fig 1 . Turn ignition switch to OFF position. Disconnect negative battery cable.
Remove the left closeout/insulator (kick) panel.
Push down on the locking tab, and pull up on the release lever to disconnect PCM harness connectors.
Depress the PCM locking tab. See Fig 2 .
Slide the PCM up and out from the PCM bracket.

Fig 1: Locating PCM Assembly (2.2L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing & Installing PCM (2.2L)

Courtesy of GENERAL MOTORS CORP.