6.6L LGH Duramax Engine Specs & Information
For 2011 to 2012 chassis cab applications, the LGH is rated at 335 horsepower and 685 lb-ft of torque; power is transmitted through the Allison 1000 six speed automatic transmission just as it is in pickup truck models equipped with the LML Duramax. For 2011 to 2016 commercial van applications, the LGH is rated at a much lower 260 horsepower and 525 lb-ft of torque. Express/Savana van applications employ the GM 6L90E six speed automatic transmission in lieu of the brawny Allison 1000.
6.6L LGH Duramax Specs
| Engine Family | 6.6L Duramax diesel (Duramax 6600) | |
| RPO Code | LGH | |
| VIN Code | L | |
| Assembly Site | DMAX engine plant, Moraine, Ohio | |
| Applications/Production Years | 2011 - 2016 Chevrolet Express 2500, 3500, 4500 vans 2011 - 2016 GMC Savana 2500, 3500, 4500 vans 2011 - 2012 Chevrolet Silverado 3500 HD chassis cab 2011 - 2012 GMC Sierra 3500 HD chassis cab |
|
| Displacement | 6.599 liters (6.6 liters nominal), 402.62 CID (403 CID nominal) | |
| Configuration | 90 degree V-8 | |
| B10 Life | Not specified | |
| B50 Life | Not specified | |
| Bore | 4.055 inches (103.00 mm) | |
| Stroke | 3.897 inches (99.00 mm) | |
| Bore/Stroke Ratio | 1.04 (marginally oversquare) | |
| Compression Ratio | 16.0 : 1 | |
| Firing Order | 1-2-7-8-4-5-6-3 | |
| Cylinder Numbers |  Cylinders 1, 3, 5, and 7 are located on the passenger side bank Cylinders 2, 4, 6, and 8 are located on the driver side bank |
|
| Engine Block Material | Cast gray iron | |
| Cylinder Head Material | Cast aluminum alloy | |
| Injection System | Direct injection Bosch high pressure common rail system Piezoelectric fuel injectors Bosch CP4.2 injection pump |
|
| Aspiration | Turbocharged, air-to-air intercooler Garrett GT3582VA variable geometry turbocharger (VGT) |
|
| Valvetrain | Overhead valve (OHV), standard cam-in-block, mechanical roller lifters 4 valves per cylinder (32 valve) |
|
| Cold Start Aid(s) | Traditional glow plug system, 1 per cylinder | |
| Engine Oil Capacity | 10 quarts with oil filter change | |
| Lube Oil Filter P/N | ACDelco PF2232 | |
| Fuel | Ultra low sulfur diesel (ULSD) or max B20 biodiesel blend | |
| Horsepower | Express/Savana Vans | 260 hp @ 3,100 rpm |
| Silverado/Sierra chassis cab | 335 hp @ 3,100 rpm | |
| Torque | Express/Savana Vans | 525 lb-ft @ 1,600 rpm |
| Silverado/Sierra chassis cab | 685 lb-ft @ 1,600 rpm | |
| Idle Speed | ~ 680 rpm @ operating temperature | |
| Governed Speed | 3,450 rpm (electronically governed) | |
| Emissions Equipment | Selective catalytic reduction (SCR, requires diesel exhaust fluid), diesel particulate filter (DPF), diesel oxidation catalyst (DOC), exhaust gas recirculation (EGR) w/ single EGR cooler | |
| Coupled Transmissions | Allison 1000 6 speed automatic (chassis cabs), GM 6L90E 6 speed automatic (vans) | |
| Engine Weight | Approx. 835 lbs | |
| Engine Dimensions | Length | Approx 30.0 inches |
| Width | Approx 30.0 inches | |
| Height | Approx 32.0 inches | |
6.6L LGH Duramax Horsepower & Torque Curves
