You're very confused about what the manufacturers do. Yes, they sell the next model year vehicles way before the year starts but that is because the manufacturers start building the next year vehicles part way though the previous year. They'll most likely shut down the plants and re-tool to incorporate any changes that apply for the next year of vehicles around the 6th or 7th month of this year and then start building 2015 vehicles by the 7th or 8th month of this year.
If the truck was sold as a '96 then it is not a '95 and you can't assume that any info which applies to the '95 model year will apply to this truck. They don't start selling '95 vehicles as '96's just because they were late being sold.
My guess would be that you're dealing with the $63 mask '7427 used on 96-97 C/K trucks for export. That would also explain why you can't connect.
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