When you say "hookup" I'm going to assume you mean "jack", the auxillary input jack. The aux jack, I believe, was standard with the Monsoon System (with or without SAT), but was not available with the standard sound system (the trim , however, could be prep'd to receive the jack as it is located out of sight). The CD botton (lower, center, right side control) is used to switch audio sources from CD to CD Changer to AUX. There is certainly the possibility that the jack has come loose from the trim and is still there, less the mounting nut that goes on the cabin side of the trim to hold the jack in place.
M.
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In der Automobil-Scheune
'02 NBT, A/T, Moonroof, Platinum Gray, Flannel Gray Leather Interior (Currently on the slab in the morgue, possible ressurection in the offing)
'05 NB Convertible, Tip 6sd, Dark Flint Gray Edition, Garnet Red Top, Bordeaux Red Leather Interior
'01 Corvette Convertible, Magnetic Red, Light Oak Top, Light Oak Leather Interior
'96 Suburban LT 2500, 454BB, Summit White, Neutral Leather Interior
'95 Camaro Z28 Convertible, Polo Green, Black Top, Tan Leather Interior
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