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.

If you missed last month’s issue, this LB7 Duramax engine (out of an ’02 Chevy 2500) spent most of its life towing studio trailers in Hollywood. The LB7 went through the usual wear and tear of ...

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 ...