2003-2007 Sierra 2500 PCM 89017734 Programmed to Your VIN

Restore Your GM Truck’s Performance and Reliability

Is your 2003-2007 Sierra, Silverado, Tahoe, or other GM truck suddenly running rough, shifting erratically, or refusing to start? A persistent Check Engine Light that won’t go away is often the first sign that the brain of your engine—the Powertrain Control Module (PCM)—is failing. Over years of heat cycles, vibration, and electrical stress, these critical components can develop internal faults, leading to a host of frustrating and hard-to-diagnose problems.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and the expensive dealership visits out of the equation. This PCM, part number 89017734, is the definitive fix for a wide range of GM’s most popular trucks and SUVs from this era.

The ‘Plug & Drive’ Solution: Programmed Specifically for Your Vehicle

The biggest hurdle in replacing a modern engine computer is the need for vehicle-specific programming. We handle that for you. Before we ship your part, our technicians will use your vehicle’s 17-digit VIN to load the latest, most stable factory software directly from GM. This ensures that all parameters for your specific engine, transmission, and emissions equipment are perfectly matched, restoring the performance and efficiency you expect.

From My Shop to Your Driveway: A customer’s 2005 Silverado 2500 with the 6.0L engine came in on a tow truck last month. It would crank but never start, and the fuel pump wasn’t priming. After checking the basics—fuses and relays—we found the PCM wasn’t sending the signal. The original module had a failed driver circuit, a common issue I’ve seen in hundreds of these trucks. We installed one of these VIN-programmed modules, performed the security relearn, and it fired right up. He was back on the road in under an hour without a trip to the dealer.

Diagnosing and Replacing Your 2003-2007 Sierra 2500 PCM

If you’re experiencing any combination of the symptoms below, a failing computer is a very likely culprit. This module is the central command for your powertrain, and its failure can cause widespread issues that might otherwise seem unrelated. Replacing your 2003-2007 Sierra 2500 PCM is a straightforward job that most DIY mechanics can handle in their own garage.

Common Symptoms of a Failing Powertrain Control Module

• ✔ Persistent Check Engine Light (CEL) with various communication or sensor codes
• ✔ Engine cranks but will not start
• ✔ Rough or unstable idle
• ✔ Poor acceleration and overall loss of power
• ✔ Decreased fuel economy
• ✔ Harsh or erratic automatic transmission shifting
• ✔ Communication errors with diagnostic scan tools

Simple, At-Home Installation Guide

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
2. Locate the PCM: On most compatible GM trucks and SUVs (like the Sierra, Silverado, and Tahoe), the PCM is located in the engine bay on the driver’s side, under or next to the battery tray.
3. Disconnect the Harnesses: The PCM has several large multi-pin electrical connectors. Carefully lift the locking levers or tabs and gently pull the connectors straight out. Never force them. Inspect the pins for any corrosion and clean with an electrical contact cleaner if necessary.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in by a few 10mm or 13mm bolts.
5. Install the New Module: Mount your new, pre-programmed PCM into the bracket and secure the bolts.
6. Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click and lock into place. Reconnect the negative battery terminal.
7. Perform Security Relearn: Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. Turn it ‘OFF’ for 10 seconds. Repeat this cycle two more times. On the fourth try, the vehicle should start and run normally. This syncs the new PCM with your vehicle’s anti-theft system.

Guaranteed Compatibility

This module is a direct replacement for a range of original equipment service numbers, ensuring a perfect match for your vehicle. It is fully compatible with parts bearing numbers: 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Whether you drive a Sierra 2500, a Hummer H2, an Escalade, or a Suburban, this programmed 2003-2007 Sierra 2500 PCM is the reliable, cost-effective solution to get your vehicle back in top condition.