Miller Built Diesel LLC

03/07/2026

LML Duramax in the shop… imagine that.

This one came in for head gaskets and a CP3 conversion kit from John C Garage, along with new OEM glow plugs and a water pump while we’re in there.

Since the factory balancer has to come off to replace the water pump, we go ahead and pin the factory balancer with a CR2 crank pin for good measure.

It’s the little things like that most people never see that make the difference.

We take a lot of pride in the details most people never see. That’s the difference between just fixing something and doing it right.

• Mahle Grade C head gaskets
• Fresh set of heads
• Head studs
• John C Garage CP3 conversion w/ S&S pump
• CR2 crank pin
• OEM water pump
• OEM glow plugs

— Miller Built Diesel

10/03/2025

Another Allison going together at Miller Built Diesel this week!



🛡️ 2-Year Unlimited Mile Warranty

👉 Message us to get scheduled today!

09/24/2025

🔥 750HP Allison Build in an LBZ This Week 🔥

⚙️ DK Goerend
⚙️ Billet Input
⚙️ Bullet C2 hub
⚙️ Pump and Valve Body mods.

Rated for 750HP

$7500 installed out the door (6speedAllison)

📍 Miller Built Diesel – Diesel Performance Transmissions / Engines

PTP
Goerend
RatioTek
TransGo
XCalliber
GPZ

08/18/2025

One less blown up 68RFE on the road.

Only about a million more to go….

06/21/2025

💥 Stop gambling with your fuel system 💥

We’re locking in long-term reliability with S&S Diesel Motorsport the best in the business.

✅ DCR Pump – Where durability meets performance. Zero tuning required. 100% drop-in for the 6.7L Powerstroke

✅ S&S CP3 Conversion – Say goodbye to CP4 failures for good. This is the design you wish GM would have stuck with.

✅ S&S Cummins Injectors – Built with uncompromising quality for the horsepower you want and the reliability you need.

Whether its peace of mind or you’re looking for more power, we’ve got proven solutions ready to go. No BS — just results.

Book now — message us📱

06/18/2025

Some more Black Market Performance goodies for this 6.7L Cummins. This intake looks awesome on this Fleece Performance Engineering cylinder head.

📍Miller Built Diesel

📲 Message the page to get scheduled

06/18/2025

🚨Another CP4 Strikes Again 🚨

Jk this customer is proactive, he’s getting a CP3 conversion from the homie John C Garage with an S&S Diesel Motorsport CP3.

This LML is ditching the CP4 before it comes apart and costs the owner upwards of $10,000 in headaches. Schedule your CP3 conversion before it schedules itself.

📍Miller Built Diesel

06/15/2025

06/14/2025

Did You Buy an LML Thinking You Finally Got a Reliable Truck?
Sike— You Bought the 6.4L of the Duramax World. 😬

From blown head gaskets, cracked pistons, two-piece crankshafts, or those bad ass CP4s throwing their own diddy parties and fu**ing your entire fuel system — (whoops)

The LML has no shortage of expensive surprises.

But don’t worry — we’ve seen it all, and we’ve got real solutions that work.
This is the #1 platform we service for a reason.

✔️ Engine builds
✔️ Head gasket fixes
✔️ CP3 conversions
✔️ Performance upgrades
✔️ Complete overhauls

Send us a message to get on the schedule.

06/14/2025

🛑 5th Gen Cummins Owners — Listen Up 🛑

If you’re still running factory roller lifters some room-temp IQ engineer thought were a good idea… you’re on borrowed time.

These lifters are a known failure point — and when they go, they don’t just fail…
They file for divorce and get full custody of the cam.

Ticking, tapping, or whatever dumb sound they make —
Next thing you know, your cam lobes look worse than your ex’s new fiancé.

We’ve seen it too many times — lifter failure wiping out cams and potentially killing engines

Flat Tappet Conversion = Peace of Mind
• Proven durability
• No more lifter roulette

06/14/2025

🔥 Built to Tow. Built to Last. 🔥
HD Transmissions

⚙️ 48RE | 68RFE | Allison 5 & 6 Speed ⚙️

Factory transmission crying for help?
Tired of it shifting like your girls mood swings?

We don’t just rebuild — we fix what the factory should’ve done right the first time.
Billet parts. Tight tolerances. No nonsense.
Installed or carry out — either way, it leaves stronger than it came in.

💬 Slide in our DMs — unless you enjoy ratio codes and 250 degree transmission temps.

Goerend
DNJ
TransGo
Sonnax
RatioTek