Programmed 2003-2007 Silverado 1500 PCM 89017750 | ECM Engine Computer

Restore Peak Performance to Your GM Truck or SUV

If you’re dealing with a frustrating check engine light, poor fuel economy, or intermittent stalling in your 2003-2007 Silverado 1500, Sierra, or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the brain of your engine, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it starts to fail, it can cause a cascade of confusing and costly problems. This replacement PCM, part number 89017750, is the reliable, straightforward solution to get your truck running right again.

We take the guesswork and high dealership costs out of the equation. Unlike a generic module from a parts store, this PCM arrives at your door pre-programmed with the latest official GM software, specifically matched to your vehicle using your VIN. This ensures perfect communication with your truck’s other modules and optimal engine performance from the moment you install it. Forget about paying for expensive programming services; we handle it for you before we ship.

Is Your Truck Showing These Telltale Signs?

A failing PCM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs attention:

• ✔ Unexplained Check Engine Light (CEL)
• ✔ Stalling, stumbling, or rough idling
• ✔ Decreased fuel efficiency
• ✔ Harsh or erratic transmission shifting
• ✔ Engine cranks but refuses to start
• ✔ Diagnostic trouble codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or communication errors (U-codes)

Your Straightforward PCM Installation Guide

Replacing your Silverado 1500 PCM is a job most DIYers can handle in under an hour. Our pre-programming service eliminates the most difficult step. After the physical installation, you’ll just need to perform a simple security relearn procedure.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
2. Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray in a black plastic holder.
3. Disconnect the Connectors: Carefully unplug the wiring harness connectors from the old PCM. These usually have a lever or tab that needs to be lifted or pressed to release them. Never force them.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
5. Install the New PCM: Mount your new, pre-programmed PCM in the same location and securely reconnect the wiring harnesses. You should hear a click as they lock into place.
6. Reconnect the Battery: Re-attach the negative battery terminal.
7. Perform Security Relearn (CRITICAL): Do NOT attempt to start the engine yet. You must perform the GM security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows your vehicle’s anti-theft system to recognize the new PCM. Your truck will not start until this is completed.

Verified Fitment for Your GM Truck or SUV

This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It is guaranteed to fit a wide range of GM vehicles. Please verify your model and year from the list below. Note that for some 2004 models, you must match the ID number 12602802.