Edge Evolution CTS3 85450-250 - 1999-2016 GM Gas Tuner and Monitor

The Edge Evolution CTS3 85450-250 is a plug-and-play performance tuner and in-cab digital monitor for 1999-2016 GM gas engine trucks and SUVs - including Chevrolet Silverado, Suburban, Tahoe, Avalanche, GMC Sierra, Yukon, Yukon XL, and Cadillac Escalade with V8 gas engines. This is a tuner that saves your factory ECM calibration, loads Edge's dyno-tested power levels through the OBDII port, and stays mounted in the cab as a real-time multi-gauge display - no hood-popping, no wiring, no professional installation required. The Edge 85450-250 covers 1999-2016 GM gas applications only; owners of 2017-2019 models need part number 85452-252, and 2019-2022 GM 1500 owners need part number 85452-K.

More Than a Tuner - One Device That Tunes and Monitors

The 85450-250 does two jobs at once: it reprograms the factory ECM with Edge's preloaded calibrations and stays mounted in the cab as a full real-time gauge package. Most tuners hand you more power and disappear into a glove box. The Edge Evolution CTS3 plugs into the OBDII port with a single cable, loads the tune, and becomes your in-cab command center - monitoring transmission temperature, boost, RPM, coolant temperature, fuel level, throttle position, air-fuel ratio, intake air temperature, and dozens of additional parameters all on a 5-inch capacitive touch screen.

If your 1999-2016 GM gas truck feels sluggish under load, hits the speed limiter, experiences unwanted cylinder deactivation from AFM/DOD, or has an inaccurate speedometer from larger tires, this is the correct device to address all of those concerns in one installation. Verify your year and engine match, then this is the right tuner to order.

Edge Evolution CTS3 85450-250 Power Levels and Gains

The 85450-250 ships with multiple dyno-tested power levels calibrated by Edge's engineering team - designed to cover daily driving, towing, performance, and extreme use cases. You can switch between levels on the fly through the swipe interface. Documented power gains by engine displacement from verified application data:

If your year and engine code appear in this table, this is the correct tuner to order. Gains are calibration-specific and reflect Edge's published dyno-tested figures for this part number.

What the 85450-250 Does Beyond Basic Tuning

The Edge Evolution CTS3 is a full in-cab control and monitoring platform, not a one-and-done flash tool. Once the tune is loaded, the device stays on the dash and delivers a live gauge package across a 5-inch auto-dimming capacitive touch screen with true swipe navigation. Here is what the CTS3 handles that a basic tune alone does not:

• AFM/DOD Disable: Eliminates GM's Active Fuel Management cylinder deactivation for smoother throttle feel and more consistent power delivery.
• Speedometer Recalibration: Corrects the factory speedometer after adding larger tires - input your tire size and the CTS3 adjusts the reading.
• Speed Limiter and Shift Point Adjustment: Modify top speed limiter and adjust transmission shift points and firmness through the touch screen interface.
• Real-Time Parameter Monitoring: Tracks RPM, transmission temperature, coolant temperature, boost, intake air temperature, battery voltage, fuel level, fuel rail pressure, throttle position, mass airflow, gear position, oil life, and more - up to dozens of parameters selectable by the user.
• 0-60 and Quarter-Mile Performance Meter: Built-in acceleration timing for performance testing.
• DTC Read and Clear: Read and clear diagnostic trouble codes directly from the CTS3 screen without a separate scan tool.
• Advanced Data Logger: Log, graph, and export hundreds of parameters for performance analysis or diagnostics.
• Backup Camera Compatible: USB port supports Edge's backup camera accessory via a single USB connection.
• EAS Expandable Accessory System Compatible: Add external sensors including EGT probes, boost sensors, temperature sensors, and SOTF switches - monitored directly on the CTS3 screen.

The suction cup mount is included. Edge custom dash pod and pillar mounts are available separately for a more factory-integrated look.

Which CTS3 Version Is Right for Your Year?

The Edge Evolution CTS3 line covers GM gas trucks across several generation-specific part numbers. Ordering the wrong version means the device will not calibrate correctly for your ECM. Use this table to confirm you have the right part number before ordering:

The 85450-250 is calibrated specifically for 1999-2016 GM gas ECMs. Confirm your model year before adding to cart - the version split between 2016 and 2017 is a hard boundary based on ECM architecture differences.

What Comes in the Box

• Edge Evolution CTS3 (part 85450-250) touchscreen tuner/monitor unit
• OBDII cable for plug-and-play connection
• Suction cup windshield/dash mount
• Preloaded Edge calibrations for all supported 1999-2016 GM gas applications

EAS accessory sensors, EGT probes, backup camera, and custom dash/pillar mounts are not included and are sold separately. No wiring harness or additional hardware is required for the core installation.

Installation Overview

Edge Evolution CTS3 85450-250 Fitment Coverage

This part number covers the following 1999-2016 GM gas engine vehicles. Confirm your year, make, and engine before ordering - the coverage ends at 2016 model year.

2017 and newer GM gas trucks require a different part number - see the version table above. Duramax diesel applications require 85400-200.

Avoid These Common Mistakes

• Ordering for a diesel: Part number 85450-250 is for GM gas engines only. Duramax diesel trucks (LB7, LLY, LBZ, LMM, LML) need a different Edge tuner.
• CA/CO shipping: This product cannot be shipped to California or Colorado addresses.
• Expecting EAS sensors included: EGT probes, boost sensors, and additional EAS accessories are sold separately - they are not in the box.
• Confusing monitor-only mode with tuning: The CTS3 is both a tuner and a monitor. It does flash the ECM with a new calibration - it is not a monitor-only device like the Edge Insight CTS3.

Emissions Compliance

The Edge Evolution CTS3 85450-250 is legal under the provisions of the EPA Tampering Policy dated November 23rd, 2020, for on-street use in all states that accept the Clean Air Act and EPA Tampering Policy provisions. Edge has documented test results supporting that this product operates within legal emissions standards for covered applications. This product cannot be shipped to California or Colorado.

Final Order Check

• Model year confirmed between 1999 and 2016 - 2017 and newer need a different part number
• Engine is a gas V8 (4.8L, 5.3L, 6.0L, 6.2L, or 8.1L) - not a Duramax diesel
• Vehicle is a Silverado, Sierra, Tahoe, Suburban, Avalanche, Yukon, Yukon XL, or Cadillac Escalade within the supported year range
• Shipping address confirmed outside California and Colorado

For a 1999-2016 GM gas truck or SUV owner who wants more power, throttle response, improved towing performance, AFM/DOD disable, and a full in-cab monitoring system in one plug-and-play device, the Edge Evolution CTS3 85450-250 is the correct tuner to order. Owners who want monitoring without ECM tuning should see the Edge Insight CTS3 monitor instead. Browse the full Edge Products lineup for other applications.

Frequently Asked Questions