GMC Sierra 1500 HD Classic vs GMC Sierra 3500 HD
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2026 GMC Sierra 3500 HD
Overview
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| Selected trim | SLE1 | Pro |
| Body style | Truck (Crew Cab) | Truck (Regular Cab) |
| Drivetrain | rear wheel drive | rear wheel drive |
| Fuel type | regular unleaded | regular unleaded |
| Transmission | 4-speed automatic | 10-speed shiftable automatic |
| Engine type | gas | gas |
| Model year | 2007 | 2026 |
Pricing & market
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| MSRP | $30,145 (best) | $47,900 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| Fuel tank | 26 gal | 36 gal (best) |
Performance
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| Horsepower | 300 hp | 401 hp (best) |
| Torque | 360 lb-ft | 464 lb-ft (best) |
| Engine size | 6 L | 6.6 L (best) |
| Cylinders | V8 | V8 |
Size & capability
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| Seating | 6 seats (best) | 3 seats |
| Doors | 4 (best) | 2 |
| Towing capacity | 10,300 lbs | 14,500 lbs (best) |
| Payload | 3,129 lbs | 4,583 lbs (best) |
| Curb weight | 5,471 lbs (best) | 6,329 lbs |
| Ground clearance | 7.4 in | 11.2 in (best) |
| Wheelbase | 153 in (best) | 142 in |
| Length | 239.7 in (best) | 236.3 in |
| Width | 79.7 in | 81.9 in (best) |
| Height | 77 in | 80.9 in (best) |
Safety & recalls
| Spec | GMC Sierra 1500 HD ClassicSLE1 | GMC Sierra 3500 HDPro |
|---|---|---|
| Open recalls (YMM scope) | None reported | None reported |
Highlighted values indicate the better figure for that spec when a clear winner exists. Specs reflect the selected trim for each vehicle. Drag a vehicle header to reorder columns. MSRP and specifications are manufacturer data; listing prices and inventory come from live dealer listings. Safety ratings are from NHTSA.
Trim overview
All available trims with MSRP. The trim selected above is highlighted; comparison specs use that selection.
| Trim | GMC Sierra 1500 HD Classic | GMC Sierra 3500 HD |
|---|---|---|
| 1 | SLE1 $30,145 MSRP(Currently comparing) | Pro $47,900 MSRP(Currently comparing) |
| 2 | SLE1 $33,465 MSRP | Pro $49,300 MSRP |
| 3 | SLE2 $31,930 MSRP | Pro $50,000 MSRP |
| 4 | SLE2 $35,115 MSRP | Pro $51,400 MSRP |
| 5 | SLT $33,680 MSRP | Pro $51,600 MSRP |
| 6 | SLT $36,875 MSRP | Pro $51,800 MSRP |
| 7 | — | Pro $53,200 MSRP |
| 8 | — | Pro $50,700 MSRP |
| 9 | — | Pro $52,100 MSRP |
| 10 | — | Pro $52,800 MSRP |
| 11 | — | Pro $54,200 MSRP |
| 12 | — | Pro $54,400 MSRP |
| 13 | — | Pro $54,600 MSRP |
| 14 | — | Pro $56,000 MSRP |
| 15 | — | SLE $54,700 MSRP |
| 16 | — | SLE $56,200 MSRP |
| 17 | — | SLE $57,000 MSRP |
| 18 | — | SLE $58,400 MSRP |
| 19 | — | SLE $58,600 MSRP |
| 20 | — | SLE $58,800 MSRP |
| 21 | — | SLE $60,100 MSRP |
| 22 | — | SLT $65,900 MSRP |
| 23 | — | SLT $66,100 MSRP |
| 24 | — | SLT $67,500 MSRP |
| 25 | — | AT4 $72,800 MSRP |
| 26 | — | AT4 $73,000 MSRP |
| 27 | — | Denali $76,100 MSRP |
| 28 | — | Denali $76,300 MSRP |
| 29 | — | Denali $79,100 MSRP |
| 30 | — | Denali Ultimate $97,200 MSRP |
| 31 | — | Denali Ultimate $97,400 MSRP |
| 32 | — | Denali Ultimate $101,300 MSRP |
GMC Sierra 1500 HD Classic vs GMC Sierra 3500 HD FAQ
- Which is better: 2007 GMC Sierra 1500 HD Classic or 2026 GMC Sierra 3500 HD?
- It depends on priorities. OpenDealer compares 2007 GMC Sierra 1500 HD Classic vs 2026 GMC Sierra 3500 HD on MSRP, fuel economy, horsepower, seating, towing, NHTSA safety ratings, and live market prices so you can weigh the tradeoffs.
- Which costs less: 2007 GMC Sierra 1500 HD Classic or 2026 GMC Sierra 3500 HD?
- Based on starting MSRP, the 2007 GMC Sierra 1500 HD Classic starts lower at $30,145.
- Which has better startingMsrp: 2007 GMC Sierra 1500 HD Classic or 2026 GMC Sierra 3500 HD?
- The 2007 GMC Sierra 1500 HD Classic leads on startingMsrp in this comparison (30,145).
- Which has better horsepower: 2007 GMC Sierra 1500 HD Classic or 2026 GMC Sierra 3500 HD?
- The 2026 GMC Sierra 3500 HD leads on horsepower in this comparison (470).
- Which has better maxTowingLbs: 2007 GMC Sierra 1500 HD Classic or 2026 GMC Sierra 3500 HD?
- The 2026 GMC Sierra 3500 HD leads on maxTowingLbs in this comparison (20,000).