I have looked on many web pages for this and I still dont know which wiring harness I need for the Delphi AM/FM/cassette radio for the 2002 Blazer.
I think the radio is a DIN 1.5, the radio is 3 1/2" H x 8" wide, maybe this is a double DIN.
I found what might be right in the part number metra 71-1858.
But that one says it is a 21 pin plug, the back of this radio has 15 actual pins, counting the pins and the blank holes without pins is 24.
And in calling around and looking on the internet I have come up with several other part numbers like GM-01 and 02 and GM-05.
Thank you for the help