Product Description

TCM Simulator Module — GM Gen4 LS | 158 MPH Fix

Compatible with: 2007–2013 GM Trucks & SUVs with E38 ECU and Gen4 LS Engine (4.8L, 5.3L, 6.0L, 6.2L)

Swapping a GM Gen4 LS engine without using the factory automatic transmission or TCM? You’ve likely discovered that the ECU defaults to a constant 158 MPH vehicle speed reading — causing issues with the speed limiter, idle control, fuel mapping, and other ECU functions that depend on transmission data.

The RPM Extreme TCM Simulator Module wires directly into your CAN bus data wires and spoofs the missing TCM messages, keeping your E38 ECU happy without a transmission present.

📡 Simulated CAN Bus Data

• Vehicle Speed (VSS) — 0 MPH
• Transmission Range (TRS) — Drive
• Transmission Temperature — 100°F
• Alternator Charging Request — 14.2V
• BCM Option Data

Need additional CAN bus messages simulated for your specific application? Custom data configurations are available on request — contact us for details.

🛠️ Installation Overview

Requires splicing into your vehicle’s existing wiring. Basic wiring knowledge required.

• Switched 12V
• Ground
• CAN Bus High
• CAN Bus Low

📦 What’s Included

• Pre-programmed EZCAN simulator module
• Pigtail wiring harness for installation

✅ Supported Vehicles

• 2007 - 2013 GM Silverado / Sierra -- 4.8L, 5.3L, 6.0L, 6.2L
• 2007 - 2013 GM Tahoe / Yukon / Suburban / Escalade -- 5.3L, 6.0L, 6.2L
• 2010 - 2015 Camaro -- 6.2L

🟢 Designed for use with the E38 ECU in a transmission-delete or engine swap application where no factory TCM is present.

Have questions or need a custom configuration?
Email us at info@rpmextreme.com