2017–2023 Duramax L5P SOTF (Switch on the Fly) Update Service

Our Duramax L5P SOTF Update Service enables switchable tunes directly on your L5P platform. Whether for towing, daily driving, or performance, you can toggle power levels seamlessly with an in-cab switch.

Key Benefits:
✅ Unlock Switch on the Fly tuning (multiple power levels)
✅ Keep factory reliability while adding flexibility
✅ Professional mail-in ECU/T87A update service
✅ Fast turnaround from Miami

Process:

1. Mail in your ECU (and T87A TCM if applicable).

2. Include your order confirmation page in the package.

3. Ship to our shop at:
   22754 South Dixie Hwy
   Miami, FL 33170

4. Our expert technicians apply the update.

5. Units are shipped back ready to install.

Turnaround Time: 1–2 business days (plus shipping).

Extra Services Available

• 🔧 Transmission TCM Unlock (T87A) – Required for 10-speed equipped trucks

• 🔧 DTC Off – Remove trouble codes if needed

• 🔧 IMMO Off – Disable immobilizer (swap/retrofit setups)

• 🔧 Performance Tuning Files – Stage 1 & Stage 2 options available

• 🔧 File Service Only – Remote tuning updates available

• 🔧 Priority Service – Rush turnaround

FAQs

Q: What years are supported?
A: This service is for 2017–2023 Duramax L5P trucks.

Q: Do I need to send both ECU and TCM?
A: If you want TCM unlocks (T87A), yes. For SOTF only, ECU is required.

Q: Will the truck be plug-and-play after?
A: Yes, the updated ECU will be plug-and-play and allow SOTF tuning.