WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Locating Camshaft Position Sensor, Crankshaft Position Sensor & Knock Sensor
Courtesy of GENERAL MOTORS CORP.
Fig 2: Locating Engine Control Input Components (Left Upper Engine)