2003-2006 Suburban 2500 PCM 28042802 Programmed to Your VIN

Is your dependable GM truck or SUV suddenly giving you headaches? Unexplained stalling, a persistent check engine light, or erratic transmission shifting can be incredibly frustrating, especially when you rely on your vehicle for work and family. Often, the root cause isn’t a mechanical failure but a problem with the vehicle’s central command center: the Powertrain Control Module (PCM). This vital component manages everything from fuel injection and spark timing to transmission operation. When it fails, it can create a cascade of baffling issues.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and the expensive trip to the dealership out of the equation. Each PCM is professionally programmed with the latest official GM software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. This ensures that the module communicates flawlessly with your truck’s specific engine, transmission, and options, restoring its original performance and reliability.

Is Your GM Truck Showing These Symptoms?

A failing PCM can manifest in many ways. If you’re experiencing any of the following, a faulty engine computer could be the cause. This is especially true if you see specific Diagnostic Trouble Codes (DTCs).

• ✔ Check Engine Light is on with communication error codes like U0100.
• ✔ Internal processor failure codes are present, such as P0601, P0602, or P0606.
• ✔ Your vehicle fails to start or stalls unexpectedly.
• ✔ Noticeable decrease in fuel economy.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ The engine seems to run rough or misfire despite new plugs and wires.
• ✔ Failure to pass an emissions test.

A Straightforward Guide to Installation

Replacing the PCM on these GM trucks is a job most DIYers can handle with basic tools. Our pre-programming service makes it a true plug-and-play repair.

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 compatible trucks and SUVs (like the Suburban, Silverado, and Sierra), the PCM is located in the engine bay on the driver’s side, typically under or next to the battery tray.
3. Disconnect the Module: Carefully unplug the electrical connectors from the old PCM. These connectors have locking tabs that need to be released. Note their color and orientation.
4. Remove the Old Unit: Unbolt the PCM from its mounting bracket.
5. Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the electrical harnesses. Ensure they click into place.
6. Reconnect the Battery: Re-attach the negative battery terminal.
7. Perform Security Relearn: In some cases, a simple security relearn procedure is needed. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. A Crankshaft Variation (CASE) relearn may also be required with a capable scan tool for optimal performance, though the vehicle will run without it.

Will This Fit My Truck?

This PCM is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, and 89017734. It is guaranteed to fit a wide range of GM vehicles. Please verify your model and year from the list below to ensure compatibility.