Chevrolet 2005 Astro Owner's Manual page 231

5. Grasp the top of the heater duct and pull down
gently to remove it.
6. Loosen the two bolts on the engine cover. The
bolts are not supposed to come out of the cover,
only from the front of the dash.
When removing the cover, be careful not to damage
the instrument panel or the trim.
7. Disconnect the AM radio ground strap.
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