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: View Of Intake Air Tube
Courtesy of GENERAL MOTORS CORP.
Loosen the clamps at the following:
Mass airflow/intake air temperature (MAF/IAT) sensor.