Car Stereos: 2002 gmc sierra, self tapping screws, screw holes

Question
what size speakers are in my 2002 standard cab GMC sierra front and back...4x7..6x9..etc?

Answer
Hi George,

Your front door speakers are round 6-1/2", mounted to the door metal.  The mounting setup doesn't match a typical after-market speaker, so if you're replacing the speaker you'll either need an adapter bracket, or you'll need to make new screw holes with a drill or self-tapping screws.   Some models also include a 1" tweeter; this is mounted to the door panel, not the door metal.

The rear speakers are 4x6".  They can often be difficult to replace, because you'll need to remove the entire interior side panel to access the speaker on most of these trucks.

Hope this helps!

Brian