It depends on the year.
According to this stovebolt description
54-55 Grill
1947.2 -1953 1954 - 1955.1
The AD trucks debuted in the second half of 1947 with a grille sporting five horizontal bars topped with a hood ornament featuring a blue bow tie and the word "Chevrolet." On either side, between the 1st and 2nd bars, were rectangular parking lights in chrome housings. Painted grilles were standard with the outer bars in body color. The outer bars each had one stripe in "cream medium" (and matched the cab stripe).
The two outer vertical bars that attach to the fenders are the same color as the fender. The three inner vertical bars are semi-flat black (to make them less visible).
Chromed outer bars were an available option except as noted below.
Chrome outer bars not available '52 and '53
Outer bars were not striped in '50-'53
Inner bars were "Channel Green" for '47 and '48
Inner bars were "Waldorf White" for '49-'53
That snagged here
https://www.stovebolt.com/techtips/i...tting%20Guide/
Not every year has such complete info but on page 56 in the 1948 info kits on the GM heritage site they do show Channel green as the back ground color on the 48 grills
https://www.gmheritagecenter.com/doc...olet-Truck.pdf
Those herritage center pfd's are still the best resource for correct info.