6.6L LBZ Duramax Specifications
2006-2007 GM LBZ Duramax Diesel Specs & Insight
The LBZ Duramax is one of the most highly sought after diesels today. Why?It’s more powerful than the LLY or LB7 Duramax and has almost none of the emissions found on the LMM, LML, and L5P trucks. The LBZ is only equipped with the exhaust gas recirculation system and lacks the diesel particulate filter and diesel exhaust fluid systems found on newer Duramax trucks. These trucks produce 360 Horsepower and 650 lb/ft torque and feature a beefier composition than the LLY. Find out more 6.6L LBZ Duramax specifications below.
LBZ Duramax Specifications
| Manufactured Years: | 2006-2007 |
| Engine Design: | 6.6L 90-Degree V8 Turbocharged Diesel |
| Transmission: | 6-Speed Auto Allison 1000 Transmission ZF650 Manual Transmission |
| Vin Identification: (8th Digit) | D |
| Displacement: | 6.6 Liters or 403 Cubic Inches |
| Engine Weight: | 835 Lbs |
| Bore: | 4.055″ or 103 mm |
| Stroke: | 3.897″ or 99 mm |
| Block Material: | Cast Iron |
| Cylinder Head: | Cast Aluminum |
| Crankshaft: | Forged Steel |
| Connecting Rods: | Forged Steel |
| Compression Ratio: | 16.8:1 |
| Firing Order: | 1-2-7-8-4-5-6-3 |
| Turbocharger/Air: | Garrett GT3788VA Variable Vane Turbocharger And Intercooler |
| Fuel Injection: | Direct Injection High Pressure Common Rail with Bosch CP3 Injection Pump |
| Valvetrain: | Overhead Valve (OHV) 4 Valves per cylinder (32V) |
| Engine Oil Capacity: | 10 Quarts With Filter |
| Fuel: | Diesel |
| Fuel Tank Size: | 34 Gallons |
| Max Engine Speed: | 3,250 RPM |
| Horsepower: | 360 horsepower |
| Torque: | 650 lb/ft of torque |
LBZ – The Duramax of Choice for Racing
The LBZ Duramax is commonly used in race applications because it offers easy power on a slightly more durable platform than the LB7 or LLY. It has a stronger block casting, stronger rods, and an ECM that makes tuning these trucks super productive and easy. At UCC this last year, we saw multiple LBZ Duramax trucks killing it at both the track and the dyno. Over 1,000 horsepower and 2,000 lb/ft of torque were surpassed by several LBZ Duramax builds. If you want to learn more about UCC, click here.
Silverado & Sierra LBZ Duramax Tow Capacity
Both Conventional and 5th wheel/gooseneck towing can vary depending on which LBZ Duramax you own. Check out our complete LBZ Tow Capacity guide below to find out how much your truck can tow! Make sure you check with your owners manual or with GM directly to find out your exact tow ratings.
2500 SRW Trucks
| Model | Conventional Tow Capacity | 5th Wheel Tow Capacity |
| 2500 Crew Cab Short bed 2WD | 12,000 lbs | 15,400 lbs |
| 2500 Ext. Cab short bed 2wd | 12,000 Lbs | 15,700 lbs |
| 2500 Crew Cab Short Bed 4WD | 12,000 lbs | 14,200 lbs |
| 2500 Ext. Cab Short Bed 4wd | 12,000 lbs | 15,400 lbs |
| 2500 Crew Cab Long Bed 2wd | 12,000 lbs | 15,100 lbs |
| 2500 Regular Cab Long bed 2wd | 12,000 lbs | 15,900 lbs |
| 2500 Ext. Cab Long Bed 2wd | 12,000 lbs | 15,500 lbs |
| 2500 Crew Cab Long Bed 4wd | 12,000 lbs | 13,200 lbs |
| 2500 Regular Cab Long Bed 4WD | 12,000 lbs | 15,600 lbs |
| 2500 Ext. Cab Long Bed 4WD | 12,000 lbs | 14,800 lbs |
3500 SRW Trucks
| Model | Conventional Tow Capacity | 5th Wheel Tow Capacity |
| 3500 Regular Cab 2WD | 12,000 lbs | 15,400 lbs |
| 3500 extended Cab 2WD | 12,000 lbs | 15,300 lbs |
| 3500 extended Cab 4WD | 12,000 lbs | 15,000 lbs |
| 3500 Crew Cab 2WD | 12,000 lbs | 15,100 lbs |
| 3500 Crew Cab 4WD | 12,000 lbs | 14,700 lbs |
3500 Dually Trucks
| Model | Conventional Tow Capacity | 5th Wheel Tow Capacity |
| 3500 Regular Cab 4wd Manual Transmission | 12,000 lbs | 15,200 lbs |
| 3500 Regular Cab 4WD Automatic Transmission | 12,000 lbs | 16,700 lbs |
| 3500 Extended Cab 2WD Manual Transmission | 12,000 lbs | 15,100 lbs |
| 3500 Extended Cab 2wd Auto Transmission | 12,000 lbs | 16,600 lbs |
| 3500 Extended Cab 4WD Manual Transmission | 12,000 lbs | 14,800 lbs |
| 3500 Extended Cab 4WD Auto Transmission | 12,000 lbs | 16,300 lbs |
| 3500 Crew Cab 2WD Manual Transmission | 12,000 lbs | 14,900 lbs |
| 3500 Crew Cab 2WD Auto Transmission | 12,000 lbs | 16,400 lbs |
| 3500 Crew Cab 4WD Manual Transmission | 12,000 lbs | 14,500 lbs |
| 3500 Crew Cab 4WD Auto Transmission | 12,000 lbs | 16,000 lbs |
Want More Information about on The LBZ Duramax?
Want more information on the LBZ Duramax? Take a look at one of our other LBZ resources by clicking on one of the links below.
ABOUT Kamil
Founder of Diesel Resource and a complete diesel head. Has a little bit of problem buying too many trucks. Learn more about him by checking out his truck.