WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Top Of Engine Wiring Harness View
Courtesy of GENERAL MOTORS CORP.
Disconnect the manifold absolute pressure (MAP) sensor electrical connector (3).
Fig 2: Removing/Installing MAP Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the MAP sensor (1) from the intake manifold.