If you'd like to upgrade the OEM door speakers, fix a faulty switch, add
soundproofing material, or replace a power window motor in your 2nd
generation Chevy Silverado 1500 truck, you'll first need to take off the
interior door panels. To view my DIY guide for the procedure, click on
the link below.
Here's the instructions page -
http://www.paulstravelpictures.com/GM-Chevrolet-Silverado-Interior-Door-Panel-Removal-Guide/index.htmlThe steps should be the same or similar for the Silverado 2500, 3500 and GMC Sierra.
Cheers,
Paul