GMC or Chevrolet?

What year truck? The 47-53 grill attachment is different from the 1954/55 grill attachment.

You state AD, so most likely you are referring to a 47-55 Advance-Design Chevrolet truck? However, some of your former posts are about a 1950 250 (1-ton) GMC (New Design - ND).

The site with on-line manuals is not responding. There might be instructions in a Shop Manual on that site (I'll post a link when the site is back up and we know what year you are referring to).

I'd remove the inner and outer fenders together.

In general, you will have to:

- disconnect all wires attached to the inner fender and, if appropriate, attached to the parking lamp on the fender.
- remove (slide aside) the heater hoses attached the inner fender..
- remove any screws that attach the grill parts to the fender
- remove the bolts attaching the rear of the fender the the cab.
- remove the inner-fender to firewall brace/bar.
- remove the bolts holding the inner fender to the cab.
- loosen the bolts that hold the bottom of the radiator frame from the chassis.
- remove the bolts that hold the inner fender to the radiator frame.
- slide the fender-assembly out from under the small "side-arm" near the top of the radiator assembly.

I hope that others will add, correct, and clarify anything above.