Originally Posted by Madcow
The 2500 Avalanche DOES NOT have coil rear suspensions, it has leaf spring suspension. The 1500 has coil springs. The Avalanche 2500 shares the same chassis and suspension as a 2500 Silverado, 2500 Sierra, 2500 Suburban or 2500 Yukon XL, etc.
I pull a 35' Cigarette Mistress on a steel tri-axle trailer with my '04 Avalanche 2500/8.1/4.10, total tow weight is right under 12000 lbs (weighed it at a weigh station fully loaded with full tank and normal gear) and it pulls it extremely well.