2001 GMC Safari Owner's Manual - Page 241

The tools you'll be using include the jack (A), wheel blocks (B), extension (C) and ratchet (D). Styled Steel Wheel Shown If you have the styled steel wheel or aluminum wheel with plastic nut caps, loosen the plastic nut caps with the ratchet and socket. Make sure the DOWN side faces you. To remove the hub cap from the aluminum wheel without plastic nut caps, fit the flat end of the extension into the notch. Then, remove the center cap. Removing the Wheel Covers You will have to take off hub caps or wheel nut caps to reach your wheel nuts. 5-23