emmission on 2003 Chevrolet Silverado 1500

I went to have my emmission test done and the shop could not do it, they claim a problem with the connection, the dealer ship said to replace the Data Link Fuse. Unable to locate the Data Link fuse on the fuse panel, can you tell me which fuse it is.

Asked by for the 2003 Chevrolet Silverado 1500
The Cigar fuse in the under hood fuse box supplies power to the data link connector.
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