GMC 2003 Safari Owner's Manual page 239

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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