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Old 02-14-2013, 11:55 AM   #2
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Join Date: May 2005
Location: Beaverton, OR
Posts: 3,730
Re: 1998 GMC 1500 EXT CAB Speaker size

5.25" in the door without mods, 4" round or 4x6 plate for the rear pillar.

If you mod the location a bit, you can squeeze a 6.5 in the door and 5.25 in the rear.
New Project: 1966 LWB C20
1/2 ton conversion
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Dropmember rear
Corvette discs
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