Hank-For your 94 k1500, the fuel door area filler neck to box plastic piece (called a "pocket") lists for $8.72. Your price would be $6.54 from me.
call your closest dealer since it's such a cheap part, the discount isn't worth the extra drive. if they don't have it, should only take a day or two for them to get.
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Bryan-NW 'burbs 1972 Malibu Vaguely stock appearing, and the opposite of restored. 1999 std bore 5.7, Vortec heads, Holley Stealth Ram, GM cam 700R4, Viking coilovers, 12 bolt 4.10 posi, and a whole bunch more