Restore Your Truck’s Core Performance and Reliability
Is your 2003-2006 GMC Yukon XL 1500 running rough, shifting erratically, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and complex issues. As the central computer of your vehicle, the PCM governs everything from fuel mixture and ignition timing to transmission shift points and emissions controls. When it falters, the entire vehicle’s performance suffers. This replacement PCM is your direct, reliable solution to get your truck back on the road, running as it should.
We take the guesswork and hassle out of the replacement process. Unlike sourcing a part from a junkyard or a generic retailer, each module we ship is meticulously programmed with the latest GM software updates specific to your vehicle’s VIN. This ensures seamless communication between all your vehicle’s systems and restores original factory performance. Simply provide your VIN after purchase, and we handle the complex programming for you, saving you a costly trip to the dealership.
Case Study: A Tricky Diagnosis
I remember a 2005 Sierra 1500 that came into my bay with a maddening intermittent no-start condition. The owner had already replaced the battery, alternator, and starter. It would run fine for days, then suddenly refuse to crank. No communication with the scan tool during the no-start events was the key clue. After checking all power and ground circuits to the PCM, we determined the module itself was failing internally, specifically when it got hot. We installed one of these VIN-programmed PCMs, performed the security relearn, and the truck has been starting reliably ever since. It saved the customer hundreds in diagnostic time and eliminated the need for a dealer tow and programming fee.
Is Your GM Truck Showing These Signs of PCM Failure?
A failing computer can cause a wide range of symptoms. If you’re experiencing any of the following, a faulty 2003-2006 Yukon XL PCM could be the root cause:
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but will not start.
- ✔ Unexplained stalling or rough idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with your diagnostic scan tool.
- ✔ Vehicle enters a reduced power or “limp” mode.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle with basic tools. Our pre-programmed module makes it even easier. Follow these general steps to get your vehicle running again.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most compatible models like the Yukon, Tahoe, and Silverado, the PCM is located in the engine bay on the driver’s side, typically under or next to the battery tray.
- Disconnect and Remove: Carefully unplug the electrical connectors. These usually have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove it.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely plug in all the electrical connectors. Ensure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn (CRITICAL): You MUST perform the GM Security Relearn Procedure. This syncs the new PCM with your vehicle’s anti-theft system. The procedure is simple: Turn the key to the “ON” position (without starting) for 10-15 minutes, then turn it OFF for 10 seconds. Repeat this cycle two more times (for a total of three cycles). On the fourth attempt, the vehicle should start and run normally.
Verified Vehicle Compatibility
This module, part number 28042802, is a direct replacement for a wide range of GM trucks and SUVs. It is compatible with service numbers 89017750, 12582605, 12589463, 12602802, and 89017734. Please verify your vehicle is on the list below. If your specific model requires an ID match (e.g., ID 12602802), ensure your original part corresponds.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls the engine and transmission functions to ensure optimal performance, fuel efficiency, and emissions. Think of it as the brain of your truck.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This includes engine size, transmission type, and any other factory options, ensuring a perfect match and proper function.
Is this a plug-and-play part?
Almost! Because we pre-program it to your VIN, you will not need a dealer’s scan tool. However, you must perform the simple Security Relearn Procedure after installation, which takes about 30 minutes using only your ignition key. We outline the steps in our installation guide.
Will this fix my check engine light?
If the check engine light is on due to a faulty PCM (e.g., code P0601), then yes, this part will resolve the issue. However, if the light is on for another reason, like a bad oxygen sensor, you will still need to fix that underlying problem.
Is this part difficult to install for a DIYer?
Not at all. For most GM trucks, the PCM is easily accessible in the engine bay. With basic hand tools and our instructions for the security relearn, most home mechanics can complete the job in under an hour.
Does this part work for other GM trucks besides the Yukon?
Yes, absolutely. This PCM fits a very wide range of GM trucks and SUVs from 2003-2007, including the Silverado, Sierra, Tahoe, Suburban, Escalade, and Hummer H2. Please check the detailed compatibility list to be certain.