Parts Diagrams

I'm looking for a manual with exploded parts diagrams for the 95-99 C/K series of trucks. I know there are a few online places, but haven't found
one that lists the GM part number. Any suggestions?
And has anyone changed the backlighting bulbs for a factory CD radio? I'm down to the backlighting for the knob, and would like to get it done soon.
All suggestions welcome, Thanks
98 K2500 Pickup 97 K1500 Suburban Diesel
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