Description
Tuning for Gen 5 (Direct Injection) 5.3L with SCT Devices
Unlock the performance your vehicle was built for. The preloaded SCT tunes deliver real-world horsepower gains, improved drivability, and have user adjustable options like DOD/AFM disable. We can deliver a custom tune if you need. SCT only supports the 2020 Tahoe with the 5.3 through the BDX (Wi?Fi) device. As of August 2025 the 6.2 requires custom tuning with HP Tuners. Things change over time so contact us if you want to see if the 6.2 is supported by SCT. ?Otherwise please do not order this if you have a 2020 Tahoe with 6.2 engine.?
Typical Gains
-
- Up to +20 HP on stock 5.3L
- Improved throttle response, shift quality, towing performance, and fuel efficiency
- NOTE: SCT does not support transmission tuning for 2016+ GM vehicles.
Supported Modifications
- ? AFM/DOD Delete (disable in ECU and/or change out of lifters)
- ? Long Tube Headers, Injectors, Intake Manifolds
- ? Cold Air Intake, Catback Exhaust, Shorty Headers
We do not support larger-than-stock cams, boost, nitrous, VATS delete, E85/flex fuel, on the Gen 5 LT platform with SCT (we do support it with HP Tuners)
Customizable Features
- ? Neutral rev limiter adjustment
- ?? Turn off or change speed governor
- ?? Tire/gear calibration, check and reset DTC, and more
How It Works
- Datalog ? Record driving logs using your SCT device
- Review ? We analyze the logs and send updated tunes
- Repeat ? Most setups are dialed in within 2?3 rounds
Recommended Packages
A tuning package includes a device, custom tune(s), and log reviews. Already have an SCT BDX or X4? We can tune it. Just order the “I have a Device & Tune Only” option or contact us to get started.
- SCT BDX with Preloaded Tune ? $475: Price for Zelle payment, covers tax and shipping. Ideal for stock or mild bolt-on builds (CAI, catback). Includes 2 log reviews. Preloaded tune disables DOD/AFM if requested.
- SCT BDX with Custom Tune ? $675: Recommended for long tubes, injectors, or manifold upgrades. Addresses idle fueling, lean out conditions under high load, idle issues, and drivability.
SCT Devices
| Device | Description |
|---|---|
| SCT BDX (WiFi) | Our top pick for most users. No PC required?tunes are delivered over WiFi. Supports CAI, headers, injectors, and manifold upgrades. Note: Does not support tuning for large camshafts, boost, nitrous, flex fuel, VATS delete, or 8/10-speed transmissions (2016+). |
| SCT X4 | PC required for initial setup and to transfer datalogs and custom tune files. Same tuning support as BDX, but uses USB cable and SCT Device Updater software. Reliable and proven. |
Custom Tune Pricing
| Service | Description |
|---|---|
| Custom Tuning ? $200 | For stock and bolt-on setups (CAI, headers, catback). Includes 2 custom files and 3 rounds of revisions. Device not included. |
| Extra Revisions ? $30 | For builds needing more than 3 revisions. Capped at $300 total (10 rounds), free after that within reason. |
| Extra Tunes ? $40 | Additional files (e.g., towing, launch control, max effort) beyond the initial 2. |
Fuel Requirements
- ?? 5.3L engines: Use 89+ octane
The Fine Print
Read our Terms and Conditions here.
Ready to Get Started?
Send us your vehicle details and goals. We?ll recommend the best setup for your build and guide you through the entire process?from logging to final tune.
