WARNING: This page is about a different car, the 2005 GMC Safari and 2005 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Secondary Hood Latch
Courtesy of GENERAL MOTORS CORP.
Using a suitable flat-bladed tool, push on the hood mounted end of the spring outward to remove the spring from the hood.