How to Identify Your GM Duramax Engine by the 8th Digit of the VIN If you own a GM truck or van with a Duramax diesel, knowing which engine you have is essential for maintenance, upgrades, and performance tuning. The fastest way to identify your Duramax engine is by checking the 8th digit of your VIN—this single character reveals your engine’s generation, and each has its own specs and quirks. Here’s a breakdown for all major Duramax engines, including model years, horsepower, and torq...
