Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed towing capacity by year
The Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed has tow data across 2 model years, from 2005 through 2006. The most recent 2006 Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed carries a maximum tow rating of 12,000 lb.
Pick a year below to open the full Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed page for that model year. Each year page shows the maximum tow capacity, every trim the dataset covers separately, the engine and drivetrain combination, GVWR, curb weight, payload, and axle ratio.
Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed max tow rating, last 2 model years
Year-over-year max tow rating for the Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed, with the most recent year highlighted. Use the trend to spot generation changes, powertrain refreshes, and SAE J2807 re-tests that revised the published figure.
Recent Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed years (2002–2006)
Click any year for the full per-trim breakdown — engine, drivetrain, horsepower, torque, axle ratio, GVWR, curb weight, and payload.
| Year | Trims on file | Max tow (lb) |
|---|---|---|
| 2006 Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed | 3 | 12,000 |
| 2005 Chevrolet-GMC Silverado/Sierra 3500 HD Ext. Cab 4WD Long Bed | 3 | 12,000 |
All figures sourced from manufacturer documentation. See our methodology for how the dataset is compiled.