Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2007 Sierra 1500, Silverado, Tahoe, or other compatible GM vehicle running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. A faulty PCM can disrupt everything from fuel delivery and ignition timing to transmission shifting, leading to frustrating and unreliable performance. This isn’t just an inconvenience; it can affect fuel economy and leave you stranded. Don’t let a bad module dictate your truck’s health.
This replacement PCM, part number 89017750, is the definitive solution. We take the guesswork and hassle out of the repair. Before we ship, we flash the module with the latest official GM software updates, specifically programmed to your vehicle’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming. It’s the most direct path to getting your truck back on the road and running smoothly.
Case Study: A Tricky Diagnosis
I once had a 2005 Silverado 2500 in my bay with a complaint of random stalling and harsh shifting. The owner had already replaced the throttle position sensor and a mass airflow sensor based on codes he pulled, but the problem persisted. My initial scan showed a U0100 (Lost Communication with ECM/PCM) code that would come and go. Instead of chasing more sensors, I checked the PCM’s power and ground circuits—they were solid. This pointed to an internal failure. After installing a VIN-programmed PCM like this one, all the issues vanished. It’s a reminder that when communication codes appear alongside performance problems, the module itself is often the root cause.
Is Your Truck Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Unexplained Check Engine Light
- ✔ Engine stalling or cutting out while driving
- ✔ Rough or erratic idling
- ✔ Harsh or incorrect transmission shifting
- ✔ A complete no-start condition where the engine cranks but won’t fire
- ✔ Poor fuel mileage
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0606 (PCM Processor Fault), or U0100 (Lost Communication)
A Straightforward Guide to Installation
Replacing your 2003-2007 Sierra 1500 PCM is a job most DIYers can handle. Our VIN programming service makes it significantly easier.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most compatible trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray or near the air filter box.
- Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. Keep the hardware, as you may need it for the new module.
- Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the wiring harnesses. You’ll hear a click as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a Passlock or anti-theft relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows your vehicle’s anti-theft system to recognize the new PCM.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM trucks and SUVs from 2003-2007, including many Chevrolet Silverado, GMC Sierra, Tahoe, Suburban, Yukon, Cadillac Escalade, and Hummer H2 models. Please check the detailed fitment list or contact us with your VIN to confirm compatibility before ordering.
Do I need to do any programming myself?
Do I need to do any programming myself?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your truck. This makes the installation process much simpler.
Why do you need my VIN?
The VIN (Vehicle Identification Number) is crucial because it allows us to access the exact factory calibration file for your vehicle’s specific engine, transmission, and options. This ensures the 2003-2007 Sierra 1500 PCM operates exactly as the manufacturer intended.
What is the security relearn procedure?
The security relearn is a simple, tool-free process that syncs the new PCM with your vehicle’s anti-theft system. Without it, the truck may not start. We include easy-to-follow instructions for this procedure with your order.
Is this a brand new part?
This is a high-quality, inspected, and tested OEM component that has been professionally prepared for resale. Each module is verified to meet or exceed original factory specifications and is loaded with fresh, vehicle-specific software for reliable, long-term performance.