Chevy GM Delco AM/FM ETR Cassette Radio - $60 (Stacy)

Digital two knob radio from a 1987 Chevy Silverado pick up truck.
The clock lights up and that's it.
The other rectangular radio was in a 1990 suburban, but I'm sure it is from a different GM vehicle.
I plugged it in, no nothing.
Use them for parts or have them fixed.
Willing to trade for a decent aftermarket AM/FM CD stereo.