Chevrolet 2003 Astro Owner's Manual page 292

B
Removing the Wheel Covers
YOU will have to take off the hub caps to reach the
wheel nuts.
The tools you'll be using include the jack (A), wheel
blocks (B), extension (C) and ratchet (D).
To remove the hub cap from the aluminum wheel, fit the
flat end of the extension into the notch. Then, remove
the center cap.
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