2016 Express 2500 Van ECM Engine Control Module 12643636

Restore Peak Performance to Your 2016 Chevy Express Van

Is your 2016 Express 2500 Van suffering from frustrating and unpredictable engine problems? Issues like a persistent Check Engine Light, rough idling, stalling, poor fuel economy, or even a no-start condition can often be traced back to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the entire powertrain can be compromised, leaving your workhorse van unreliable and off the road.

This replacement Engine Control Module, part number 12643636, is the definitive solution to get your van running like new again. We take the guesswork and hassle out of the repair process. Unlike a generic module from a parts store, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). This ensures that all factory settings, security information, and the latest GM software updates are correctly loaded before it even ships. The result is a straightforward installation process and restored factory performance.

Is Your Van Showing Signs of a Faulty 2016 Express 2500 ECM?

A failing engine computer can manifest in numerous ways, often starting as intermittent issues that worsen over time. If you’re experiencing any of the following, a faulty ECM is a likely culprit:

• ✔ Check Engine Light: The light is on and may be accompanied by various diagnostic trouble codes (DTCs) related to sensors, communication, or processor faults.
• ✔ Engine Stalling or Misfiring: Your van may stall unexpectedly while driving or at idle, and you might notice a rough or hesitant engine performance.
• ✔ No-Start Condition: The engine cranks but refuses to start, often due to the ECM not commanding the fuel pump or ignition coils to operate.
• ✔ Poor Fuel Economy: A sudden and unexplained drop in your van’s MPG can be caused by the ECM failing to calculate the correct air-fuel mixture.
• ✔ Erratic Transmission Shifting: The ECM works with the Transmission Control Module (TCM), and a fault can lead to harsh shifts, delayed engagement, or getting stuck in a single gear.
• ✔ Communication Issues: Your diagnostic scan tool may be unable to communicate with the ECM, a clear sign of an internal module failure.

Plug-and-Play Solution with VIN Programming

The biggest challenge with replacing a modern engine computer is the complex programming required. This module eliminates that barrier. Simply provide us with your van’s VIN during checkout, and our technicians will flash the unit with the precise software for your vehicle’s specific configuration (engine, transmission, and options). This service ensures compatibility and proper function right out of the box. While the module is programmed for a simple installation, some GM vehicles may require a brief, tool-free security relearn procedure after installation, which typically involves a sequence of key cycles. Instructions for this are readily available and easy to follow.

Broad Compatibility Across the GM Lineup

This versatile ECM, identified by part number 12643636, is a direct replacement for several other part numbers, including 12668866, 12668994, 12663405, 12670335, 22819494, and 12692200. It is not only the correct part for the 2016 Express and Savana vans with 4.8L and 6.0L engines but also fits a wide range of other GM cars, trucks, and SUVs. Please verify your original part number or consult the detailed fitment list below to ensure this is the correct component for your vehicle.