If you want to figure out which of these Duramax variants is under the hood of your early-2000s GM truck, the easiest way to do so is by verifying the vehicle's model year, with the LB7 utilized ...

With the Duramax started back up, the balance rates of the new injectors are checked and fall well within spec, and the LB7 is ready to hit the road for thousands more miles!

Back in 2006, Nick D’Amico showed up at the first Diesel Power Challenge in an ’02 Chevrolet Silverado 2500HD using a Duramax LB7 engine fitted with the factory turbocharger.

Early in the history of Duramax engines, GM changed the LB7 series of engines to LLY, but it can be difficult to tell them apart. Here’s how.