Audio Systems: 1993 chevy silverado 1500 radio, chevy silverado, ext cab

Question
i have a 1993 chevy silverado 1500 ext cab and i was wanting to take out the equalizer/casset player and put in a cd player... but i get down their to find the plug and their is a built in amp or something and the radio and the equalizer thing is pluged into it but the connector i bought for it (right year and make) is no where close to fitting in the amp thing or w/e it is.

Answer
the radio is under the dash near the acelerator pedal
you need to remote this metal box it is the tuner and amplifier together also the antenna plug is there and run your cables from there
use the 89 90 instructions

http://www.installdr.com/Harnesses/GM-Wiring.pdf