Is Your 2003 GMC Envoy XL Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, unexplained stalling, harsh shifting, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As a technician with over 20 years of experience, I’ve seen these exact symptoms on countless GM vehicles of this era. The PCM is the brain of your vehicle, controlling everything from fuel mixture and ignition timing to transmission shift points. When it fails, the entire system suffers.
The Simple, Reliable Solution: A VIN-Programmed PCM
Forget expensive dealership visits and the hassle of finding a shop that can program a new module. We provide a straightforward solution. This PCM, part number 89017750, is a direct-fit replacement for your Envoy XL and a wide range of other GM trucks and SUVs. The best part? We program it specifically for your vehicle using your VIN before we ship it. This means it arrives loaded with the latest official GM software updates, ensuring optimal performance and compatibility right out of the box.
Expert Pro Tip: Before installing your new PCM, take a moment to inspect the electrical connector harnesses. On these GMT370 platform vehicles like the Envoy XL, I’ve often traced intermittent issues to corrosion or bent pins inside the connectors, not the module itself. A quick spray with electronics cleaner and a careful inspection can prevent future headaches and ensure a solid connection for your new part.
Key Benefits of This Engine Control Module:
- โ Fixes Common Issues: A direct solution for check engine lights (especially communication codes), erratic engine behavior, poor fuel economy, and transmission problems.
- โ VIN Programmed: Arrives ready to install with the latest GM software tailored to your specific vehicle. No extra programming needed.
- โ Save Time & Money: Skip the diagnostic and programming fees at the dealership, which can save you hundreds of dollars.
- โ Broad Compatibility: This module replaces multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802.
Easy Installation for Your 2003 Envoy XL PCM
Replacing the PCM on your 2003 Envoy XL with the 5.3L engine is a job most DIY mechanics can handle in under an hour. It’s located in the engine bay, right next to the air filter box, making it easily accessible.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Open the hood and find the PCM mounted to a bracket next to the air cleaner assembly on the driver’s side.
- Disconnect Connectors: Carefully unclip and pull back the locking levers on the electrical harnesses to release them from the module. There are typically two or three main connectors.
- Remove the Old PCM: Unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in place, securely reconnect the electrical harnesses, and ensure the locking levers click into place.
- Final Step: Reconnect the negative battery terminal. Your vehicle may need to go through a brief idle relearn procedure, which typically involves starting it and letting it idle for a few minutes.
After your purchase, simply send us your vehicle’s 17-digit VIN, and our technicians will handle the programming. We’ll get your Envoy XL back to running smoothly and reliably. Restore your vehicle’s core performance and drive with confidence.