Free shipping over $150 · L5P Duramax parts · Custom work in North Carolina
L&D Diesel LLC · North Carolina

Run it
harder.
Built for the L5P.

High quality parts and services, backed by dependable customer support. Built in our own bay in North Carolina.

Fits 2017–2026 Chevy Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD — 6.6L Duramax L5P.

Free Ship $150+
Shipped from NC
Diesel-Only
We don't dabble
30-Day Returns
No hassle
Tech Support
Talk to a wrench
// Shop by System

Pick Your Upgrade

// Featured

On the Bench

No products yet

Tell me what you want to sell in chat — name, price, short description — and I'll load it into your store.

e.g. "Add a 4-inch lift kit for $899"

// From the Bay

Real Trucks, Real Work

In the bay.
GMC Sierra Denali HD taped up for a build at L&D Performance Diesel
Taped up.
Duramax EGR components removed during teardown
EGR out.
Duramax turbo and intake manifold during a swap
Turbo swap.
L&D branded silicone coupler installed on a Duramax
Our badge on it.
Red intake piping and turbo on a customer L5P
Fresh intake.
Finished Duramax engine bay after service
Buttoned up.
// Straight from the Shop

Builds, reels,
and shop days.

"I am a one man band just trying to make a name for myself. Currently specializing in L5P performance modifications."

— Straight from our Facebook

// The Code

Shop-built.
Truck-proven.

We're a small North Carolina shop that got tired of babying failure-prone factory parts. Every kit we sell gets built, bolted on, and beat on in our own trucks before it ships in yours.

Read the Manifesto
GMC Sierra Denali HD in the L&D Performance Diesel shop in North Carolina
L&D Diesel LLC · NC// Made in USA