The 2002 GMC Sierra-2500HD has a V8 engine.
The 2002 GMC Savana has a V6 engine.
The 2002 GMC Yukon has a V8 engine.
The 2002 GMC Savana has a 4.3 L base engine size.
The 2002 GMC Yukon has a 4.8 L base engine size.
The 2002 GMC Savana-Cargo has a V6 engine.
The 2002 GMC Yukon-XL has a V8 engine.
The 2002 GMC Sierra-1500 has a V6 engine.
The 2002 GMC Sierra-2500HD has a 6.0 L base engine size.
The 2002 GMC Savana-Cargo has a 4.3 L base engine size.
The 2002 GMC Yukon-XL has a 5.3 L base engine size.
The 2002 GMC Sierra-1500 has a 4.3 L base engine size.
It's worth about $13,000. See quotes at http://www.edmunds.com/gmc/sierra2500hd/2006/index.html