Check out this video DIY tutorial for taking off the plastic interior door panels in a 2000, 2001, 2002, 2003, 2004, 2005 & 2006 GM Chevy Tahoe in order to upgrade the OEM speaker.
These DIY instructions should be the same for other similar General Motors vehicles such as the Silverado, Suburban, Avalanche, GMC Yukon Denali, Sierra, Hummer H2 and Cadillac Escalade.
Here are all of my tutorials –
2000-2006 GM Chevy Tahoe DIY Repair & Maintenance Tutorials