On my 1995 Ford Explorer XLT the width between the wheel wells in the cargo area is ( 41.9 inches )
It all depends on what type of goods or cargo it will carry. You'll need a right big lorry to carry 3000 kilos of air, only about 3000 liters of cargo space for 3000 kilos of water, and not much space at all to fit 3000 kilos of concrete or lead.
The 2008 Chevrolet Express-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2007 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2012 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2010 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2008 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2001 Chevrolet Express-Cargo's engine produces 250 ft-lbs. @ 2800 rpm.
The 2011 Chevrolet Express-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2005 Chevrolet Express-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2007 Chevrolet Express-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
The 2006 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.