2024 GMC Sierra 2500HD AT4X (6.6L Diesel)
The 2024 GMC Sierra 2500HD AT4X (6.6L Diesel) is a 470-hp 6.6-liter turbocharged with an allison 10l1000 10-speed automatic and four-wheel drive.
| Spec | Value |
|---|---|
| Engine | |
| Engine Type | Duramax 6.6L V-8 Turbo-Diesel; cast iron block; cast aluminum heads |
| Displacement | 6.6 L |
| Horsepower | 470 hp |
| Torque | 975 lb-ft |
| Valvetrain | Overhead-valve, 4 valves per cylinder |
| Bore and Stroke | 103 x 99 |
| Compression Ratio | 16.0:1 |
| Injection Type | Common-rail direct fuel injection |
| Drivetrain | |
| Drive Type | 4WD |
| Transmission | |
| Transmission | Allison 10L1000 10-Speed Automatic |
| 1st Gear | 4.54 |
| 2nd Gear | 2.87 |
| 3rd Gear | 2.06 |
| 4th Gear | 1.72 |
| 5th Gear | 1.48 |
| 6th Gear | 1.26 |
| 7th Gear | 1 |
| 8th Gear | 0.85 |
| 9th Gear | 0.69 |
| 10th Gear | 0.63 |
| Reverse | 4.54 |
| Final Drive | 3.42 |
| Fuel Economy | |
| Recommended Fuel | Diesel |
| Suspension | |
| Front Suspension | Independent front suspension with torsion bars; 1.5-in factory-installed lift |
| Rear Suspension | Semi-elliptic, two-stage, multi-leaf springs; 1.5-in factory-installed lift; Multimatic DSSV dampers |
| Brakes | |
| Front Brake Disc | 14.0 x 1.6 in / 355 x 40 mm ventilated disc |
| Rear Brake Disc | 14.1 x 1.3 in / 360 x 34 mm ventilated disc |
| Tires & Wheels | |
| Wheels Front | 18 x 9 in aluminum |
| Wheels Rear | 18 x 9 in aluminum |
| Tires Front | LT305/70R18 MT |
| Tires Rear | LT305/70R18 MT |
| Dimensions & Weight | |
| Length | 250.7 in |
| Width | 81.9 in |
| Height | 82.6 in |
| Wheelbase | 159.1 in |
| Front Track | 69.3 in |
| Rear Track | 70 in |
| Ground Clearance | 11.6 in |
| Approach Angle | 31.6° |
| Departure Angle | 25.7° |
| Curb Weight | 8,237 lbs |
| Interior | |
| Headroom Front | 43.03 in |
| Headroom Rear | 40.12 in |
| Legroom Front | 44.53 in |
| Legroom Rear | 43.4 in |
| Shoulder Room Front | 66.02 in |
| Shoulder Room Rear | 65.3 in |
| Hip Room Front | 61.18 in |
| Hip Room Rear | 60.24 in |