Tackling an LB7 Injectors Replacement at Home

So, you've finally accepted that an lb7 injectors replacement is in your immediate future. If you own a 2001 to 2004 Chevy or GMC with the Duramax diesel, this is basically a rite of passage. It's the one thing every LB7 owner dreads, yet almost everyone has to deal with eventually. These trucks are absolute legends for their power and longevity, but those original injectors were tucked away under the valve covers where they soak in heat and fuel, making them a bit of a weak point. ...

February 10, 2026 · 7 min · Duchin Bernardo