Check out this video DIY tutorial for removing a weak or dead 12V automotive battery in a second generation 2000, 2001, 2002, 2003, 2004, 2005 & 2006 GM Chevrolet Tahoe. The steps should be the same for the Chevy Silverado truck, Suburban, Avalanche, GMC Yukon, Sierra, Hummer H2 and Cadillac Escalade.
Full DIY Guide –
2000-2006 GM Chevy Tahoe 12V Battery Replacement Guide
Here are all of my DIY maintenance and tutorials for the 2000-2006 GM Chevy Tahoe –
2000-2006 GM Chevy Tahoe DIY Repair & Maintenance Guides