Product Description

EDGE PRODUCTS 98654 EAS SHIFT-ON-THE-FLY (SOTF) ACCESSORY – 2004.5–2010 GM 6.6L DURAMAX

The EDGE PRODUCTS 98654 EAS Shift-On-The-Fly (SOTF) accessory lets you change custom tunes* on the fly through your Edge Insight monitor instead of drilling a hole in your dash. Designed for tuned 2004.5–2010 GM 6.6L Duramax trucks, this kit uses your Insight CTS3/CTS2/CS2 screen to command SOTF power levels with a clean, factory-style install. edge products 98654 eas sotf, shift on the fly kit 2004.5-2010 gm 6.6l duramax, lly lbz lmm custom tuning switch, edge insight cts3 cs2 cts2 accessory, duramax tune switch no drilling, cpp diesel edge products

Instead of adding a separate knob-style switch, the EAS 98654 module ties into the EAS network and sends the voltage-based signal (typically 1–5 volts) that most custom tuners use for 5-level SOTF or DSP-style tuning. Once your truck is flashed with compatible custom tunes, you can bump between power levels directly on the Insight display for towing, daily driving, or performance without ever leaving the screen. edge 98654 gm duramax sotf accessory, dsp5 style tune switch, voltage based tune select 1v 2v 3v 4v 5v, custom diesel tuning support, cppdiesel.com edge eas parts

*Requires compatible custom tuning that supports SOTF/DST voltage-based switching. Custom tunes are created by third-party tuners and are not affiliated with or endorsed by Edge/Powerteq or CPP Diesel. Always verify tune compatibility before installation.

Key Features

• Lets you change custom tune levels on the fly through the Insight screen (no dash drilling required).
• Voltage-based SOTF control (1–5V) compatible with many CSP/DSP-style custom tunes.
• Works with Insight CTS3, CTS2, and CS2 monitors using the EAS network.
• Clean, plug-and-play EAS accessory – designed to integrate with existing Edge harnessing.
• Ideal for tow, street, economy, and performance power levels on a single custom-tuned Duramax.
• Backed by Edge Products engineering and supported by CPP Diesel.

Vehicle Fitment – EDGE 98654 EAS SOTF

This part number is specifically engineered for GM Duramax applications that use custom tuning with voltage-based SOTF or DSP-style switching.

• 2004.5–2010 Chevrolet Silverado 2500HD/3500HD – 6.6L Duramax LLY/LBZ/LMM
• 2004.5–2010 GMC Sierra 2500HD/3500HD – 6.6L Duramax LLY/LBZ/LMM

Requirements:

• Edge Insight CS2, CTS2, or CTS3 monitor installed and functioning.
• Compatible custom tuning that uses a 1–5V SOTF/DST signal for power level selection.
• Proper wiring of the EAS SOTF accessory into the existing switch circuit (per your tuner’s instructions).

Note: While the EAS SOTF accessory line covers multiple platforms (Duramax/Cummins/Power Stroke), this 98654 SKU targets 2004.5–2010 GM 6.6L Duramax trucks. Always confirm part number and tune compatibility before ordering.

How the EAS SOTF 98654 Works

1. The EAS SOTF 98654 accessory plugs into your Edge EAS network and ties into the custom-tuning SOTF wiring.
2. The Insight monitor sends one of five voltage signals (typically 1, 2, 3, 4, or 5 volts) that your custom tune interprets as different power levels.
3. You select tune levels directly on the Insight screen, just like changing power levels on a Juice w/ Attitude CTS3 – but now for your custom tunes.
4. Your custom-tuned ECM responds to the voltage signal and switches the appropriate power level while you drive.

This accessory replaces a traditional knob-style DSP/SOTF switch with digital control through your Edge Insight display, simplifying your cab layout and giving you precise, on-screen confirmation of tune position.

Pairs Great With These EDGE PRODUCTS From CPP Diesel

• EDGE PRODUCTS 84130-3 INSIGHT CTS3 UNIVERSAL OBD-II MONITORING – the industry-leading digital monitor that displays your tune level, EGT, boost, trans temp, and more on a 5" touchscreen.
• EDGE PRODUCTS 98620 EAS EGT STARTER KIT DAILY DRIVER/TOW KIT – adds an EGT probe and EAS starter cable so you can watch exhaust gas temps with your Insight CTS3/CTS2/CS2.
• EDGE PRODUCTS 98611 EAS EGT KIT W/OUT STARTER – ideal if you already have an EAS starter cable and just need a pyrometer add-on.
• EDGE PRODUCTS 98616 EAS CONTROL KIT COMPATIBLE W/ CS2/CTS2/CTS3 – a pre-bundled EAS kit that combines key accessories for serious data and control through your Insight monitor.

Installation Notes

• Plan your routing so the harness avoids sharp edges, moving parts, and high-heat areas.
• Follow your tuner’s wiring diagram for the original DSP/SOTF switch circuit – the EAS SOTF accessory wires into that same circuit.
• After wiring, verify tune switching in a safe location (key-on/engine running) before towing or full-throttle operation.
• Always confirm SOTF tuning has been correctly flashed to the ECM before attempting to change power levels on the Insight.

Emissions & legality: Emission Code 6 – typically for racing, competition, or other limited-use applications. Check your local and state emissions laws before installation or use on public roads.

Frequently Asked Questions – EDGE 98654 EAS SOTF

Do I need custom tunes for the EDGE PRODUCTS 98654 EAS SOTF to work?

Yes. The 98654 EAS SOTF accessory is designed to work with voltage-based custom tuning (often CSP/DSP-style) that supports 1–5V input for power level selection. The accessory itself does not add power – it simply replaces a physical SOTF knob with digital control through the Insight screen.

Which Edge monitors are compatible with the 98654 EAS SOTF kit?

The 98654 is designed to integrate with the Edge Insight CTS3, CTS2, and CS2 using the EAS (Expandable Accessory System) network. If you are still on a legacy monitor, we recommend upgrading to the EDGE PRODUCTS 84130-3 INSIGHT CTS3 for the best experience and support.

Will the EAS SOTF 98654 work on stock, non-tuned trucks?

No. This accessory requires ECM tuning that is specifically configured for SOTF/DST voltage inputs. On a completely stock truck (no custom tunes), plugging in the EAS SOTF kit will not change power levels. Work with your preferred custom tuner for a tune package that supports shift-on-the-fly.

Does the 98654 kit include an Insight CTS3 monitor?

The 98654 part number is only the EAS SOTF accessory. It does not include an Insight monitor. If you need a screen, bundle it with the EDGE PRODUCTS 84130-3 INSIGHT CTS3 from CPP Diesel so you can monitor vital parameters and control tune levels from one device.

Is this kit legal for on-road use everywhere?

Because the 98654 EAS SOTF relies on custom performance tuning, it is generally intended for racing, competition, or limited-use applications in areas where such modifications are allowed. Always review local emissions regulations and use this product in accordance with all applicable laws.

Specifications for EDGE PRODUCTS 98654