Duramax Custom Tune
$1,050.00
Details
The L5P responds extremely well to calibration. This is a custom file for your truck — not a generic flash — matched to your calibration number, fuel system and usage. Expect a noticeably more responsive truck that still passes a sniff test, with towing manners intact. L5P ECMs require unlock hardware on some platforms; if you're not sure what your setup needs, ask before ordering and we'll walk you through it.
Fitment
- 2001–2027Chevrolet / GMCSilverado / Sierra HD6.6L Duramax L5P
Not sure it fits? Ask us before you order.
What we'll need from you
- ▸ VIN and ECM operating-system / calibration number
- ▸ Year, make, model, engine and transmission
- ▸ Current modifications and what you want out of the tune
- ▸ Stock/read file upload — required on most platforms (EZ Lynk orders usually don't need one)
After checkout you'll complete a guided questionnaire and secure upload tied to your order. See the tune revision policy.
How it works
Order
Purchase the tune for your platform.
Questionnaire
VIN, calibration number, mods and goals — plus your read file if required.
Calibration
Your file is built for your truck, not pulled off a shelf.
Delivery
Download securely from your SDPI account.
All SDPI products are sold for lawful use. Performance calibrations are built for the emissions configuration you report and applicable local regulations — see our terms for details. $1,050.00 is the base price. Additional modifications are priced per option and shown before you add to cart. Your platform selection is confirmed at checkout.