Fleet & Specialty
GM & Duramax Specialist
While we work on all makes, GM vehicles and the Duramax are right in our wheelhouse — we know their quirks, their weak points, and how to fix them right.
Signs you may need gm & duramax
We work on all makes, but GM vehicles and the Duramax are squarely in our wheelhouse. We know these platforms — where they're strong, where they're weak, and what tends to go wrong as the miles add up. That knowledge means we spend less time guessing and more time fixing.
Why platform knowledge saves you money
A shop that sees the same trucks every week learns the patterns. We know the common Duramax trouble spots — fuel system and injectors, the CP4 pump, hard starts, low power — and we know the GM electrical and emissions quirks that send the check engine light on. When you already know where a platform fails, you diagnose faster, order the right part once, and skip the parts-cannon guesswork that runs up a bill.
Duramax done right
Duramax diesels earn their keep, but the fuel and injection system demands respect. We diagnose injector and pump problems by the numbers, check fuel quality and supply, and fix the root cause instead of throwing injectors at a symptom. A FASS fuel system is one of the smarter upgrades for protecting that pump — and we're an authorized FASS dealer.
Emissions, the legal way
Let's be straight: we don't do deletes. EGR and DPF work here means real service, cleaning, diagnosis, and repair that keeps your truck running right and street-legal. If your emissions system is throwing codes, we find out why and fix it properly.
Got a GM or Duramax that needs a sharp eye? Call or text (912) 601-7083 to get it on the schedule.
GM & Duramax — common questions
Do you only work on GM and Duramax?
No. We service all makes and models, gas and diesel. GM and the Duramax are just platforms we know especially well, so they're an easy yes for us.
Will you delete the EGR or DPF on my Duramax?
No. We don't do emissions deletes. We service, clean, diagnose, and repair the emissions system so the truck runs right and stays street-legal.
My Duramax keeps losing power and throwing codes. Can you find it?
That's the kind of work we like. Low power and codes usually trace back to the fuel system, injectors, a sensor, or emissions. We diagnose to the root cause instead of swapping parts and hoping.
Related services
While we have it in
Athens, GA & Northeast Georgia
Need gm & duramax? Let's get it fixed.
Call or text Appalachian Auto & Diesel and describe what's going on. Honest diagnosis, fair pricing, and repairs done right the first time.