Restore Peak Performance to Your GM Truck or SUV
Is your Suburban, Tahoe, or Silverado running rough, stalling unexpectedly, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and unpredictable issues. As the brain of your vehicle’s engine and transmission, a faulty PCM can cause a cascade of problems, from poor fuel economy to a persistent check engine light. This replacement 2003-2006 Suburban 1500 PCM is the reliable, long-term solution you need to get your truck back on the road with confidence.
We take the guesswork and hassle out of the repair. Unlike a generic module from a parts store, this PCM arrives at your door fully programmed with the latest official GM software, flashed specifically to your vehicle’s VIN. This means no expensive trips to the dealership for programming. It’s a true plug-and-play solution designed for both professional mechanics and capable DIY enthusiasts.
Case Study: A Tricky Diagnosis
I once had a 2005 Silverado 2500 in the bay with a complaint of intermittent stalling at stop lights. The owner had already replaced the fuel pump and cleaned the throttle body, but the problem persisted. No hard codes were stored, just a pending P0606 (ECM/PCM Processor Fault). After checking all the power and ground circuits to the module, everything looked perfect. On a hunch, I monitored the 5-volt reference signal while tapping on the PCM housing. Sure enough, the voltage would drop out, causing the engine to stumble. A hairline crack on the circuit board, invisible to the naked eye, was the cause. A new, pre-programmed PCM like this one solved the issue permanently, saving the customer from further diagnostic headaches and the high cost of dealer service.
Is Your GM Truck Showing These Signs of PCM Failure?
- ✔ Unexplained Check Engine Light with codes like P0601, P0602, P0606, or U0100.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Problems with anti-theft systems or other electronic features.
Your Straightforward PCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to fully discharge.
- ✔ Locate the PCM: On most compatible GM trucks and SUVs, the PCM is found in the engine bay on the driver’s side, often under or next to the battery tray.
- ✔ 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. It’s typically held in by a few 10mm or 13mm bolts.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect the negative battery terminal.
- ✔ Security Relearn Procedure: In some cases, a simple security relearn procedure is needed. Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle three times. On the fourth try, the vehicle should start.
Verified Vehicle Compatibility
This module, identified by part number 89017750, is a direct replacement for service numbers 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM vehicles, including but not limited to:
- ✔ 2003-2006 Chevrolet Suburban 1500 & 2500
- ✔ 2003-2007 Chevrolet Silverado 1500, 2500, 3500 (Classic style for ’07)
- ✔ 2003-2006 Chevrolet Tahoe & Avalanche 1500
- ✔ 2003-2007 GMC Sierra 1500, 2500, 3500 (Classic style for ’07)
- ✔ 2003-2006 GMC Yukon & Yukon XL
- ✔ 2003-2006 Cadillac Escalade, ESV, EXT
- ✔ 2003-2007 Hummer H2
- ✔ 2003 Isuzu Ascender / GMC Envoy XL / Chevy Trailblazer EXT (5.3L)
- ✔ 2003 Chevrolet SSR
Please ensure your vehicle is on this list. The most accurate way to confirm fitment is to match the service number on your current PCM.