I think the green/blk, grn, gry, gry/blk are the FOUR speaker wires and the black is the common speaker ground to all and not the radio ground like i thought, what has me puzzled is the grn/red, gray/red, and the blk/gry. DAVE
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"been there, done that, ruined the T-shirt".
2007 LBZ GMC Sierra, ECSB
2006 LM7 RCSB Silverado
98 Vortec project.
94,3500,6.5L 4L80
81 SWB GMC POS finally gone
73 Pinto, stock, w/CragarSS's-eww 
84,C10 SWB-Yella,stock
86 K10 SWB-Red, hopped up 305,4/S
LOTS of Cummins trucks.
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