Diesel Truck Platforms

If you run a 2004.5-2005 GMC Sierra or Chevy Silverado with the LLY Duramax, you already know the Duramax LLY turbocharger is the engine’s most temperamental component. The Garrett GT3788VA variable-vane unit was a leap forward over the fixed-geometry IHI on the earlier LB7, but it brought its own headaches: sticking vanes, overheating, and the

If you’re running a Cummins ISX or ISX15 and the turbo is acting up, the first thing you need to know is which Holset variable geometry unit you’re actually dealing with. The HE400VG, HE451VE, and HE531VE all bolt to ISX-family engines, but they’re built for different power bands, emissions setups, and model years. Mix them

If you’re running a 12-valve or 24-valve Cummins ISB 5.9L under the hood of a Dodge Ram, the turbocharger bolted to that exhaust manifold is the single biggest factor in how your truck pulls, spools, and survives a 350,000-mile life. The two chargers that define this platform are the Holset HX35 and the variable-geometry HE341VE,

If you wrench on 5.9L Cummins trucks, you already know the Holset turbo bolted to that inline-six is half the reason these engines move freight for 400,000 miles without blinking. But the Ram 2500/3500 5.9L Cummins turbocharger lineup confuses a lot of owners and even some shops, because Dodge ran three very different Holset units

If you run a 6.7L Cummins in a Ram 2500 or 3500, the turbocharger bolted to that engine is either a Holset HE351VE or a Holset HE300VG, and knowing which one you have changes everything about diagnosis, parts ordering, and repair cost. Both are variable geometry turbos (VGT), both use an electric actuator, and both