WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P0343: Camshaft Position Sensor - Signal High (Steps 2-6)
Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0343: Camshaft Position Sensor - Signal High (Steps 7-16)