What engine is in a 2007 Express Duramax van?
The 2007 Express Duramax van is powered by a 6.6-liter Duramax V8 turbo-diesel engine.
During the 2001–2007 span, GM used several Duramax variants in Express/Savana vans. The exact engine code and output can differ by production date and market. Below is a breakdown of the Duramax engine family that appeared in these vans and what to expect from each variant.
Engine family and variants used in the Duramax lineup (2001–2007)
Below are the primary Duramax variants that powered GM's Express/Savana vans during that era. The numbers reflect approximate outputs for each engine code, with real-world figures depending on calibration and market.
- LB7 (2001–2004): 6.6L turbo diesel, approximately 300 hp and 520 lb-ft of torque.
- LLY (2004.5–2006): 6.6L turbo diesel, roughly 310–325 hp and 520–525 lb-ft of torque.
- LBZ (2006–2007 in heavier-duty vans): 6.6L turbo diesel, about 360 hp and 650–660 lb-ft of torque.
The exact engine code and output on a given 2007 Express can vary by configuration and market. Check the build sheet or engine code stamp for precise specs.
What else to know about the engine and drivetrain
In this era, the 6.6L Duramax was typically paired with an Allison 1000 six-speed automatic transmission, designed for heavy-duty use. Some configurations included exhaust aftertreatment to meet emissions standards, such as particulate filters and EGR systems. This combination provided strong low-end torque for hauling and commercial use, while fuel economy was modest given the vehicle’s size and purpose.
Performance and maintenance highlights
Key maintenance considerations include diesel-grade oil changes, attention to the fuel system, and monitoring for injector, glow-plug, or EGR-related issues common to Duramax-equipped vans of that era. Depending on the exact emission configuration, a diesel particulate filter (DPF) or related components may be present. Always verify specifications via the VIN/build sheet for precise engine code and performance figures.
Summary
In short, a 2007 Express Duramax van runs a 6.6-liter Duramax V8 turbo-diesel engine, with the likely variant being LBZ for many heavy-duty configurations, delivering substantial torque and towing capability when paired with an Allison 1000 automatic transmission. The precise output depends on the engine code (LB7, LLY, or LBZ) and the vehicle’s specific build.
