Restore Your Truck’s Brainpower: Pre-Programmed GM Engine Computer
If your 2003-2006 GMC Yukon XL 1500 is experiencing baffling issues like stalling, erratic shifting, a persistent check engine light, or simply won’t start, the Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is critical. This isn’t just a replacement part; it’s a direct solution, delivered to your door already programmed with the latest GM software updates specifically for your vehicle’s VIN. You get a reliable fix that restores factory performance without the high cost and hassle of a dealership visit.
Case Study: The Intermittent Stall on a Sierra 2500
A customer brought in his ’05 Sierra 2500 with a 6.0L that would die randomly at stoplights. No codes, no warning—it would just shut off. We checked fuel pressure, sensors, and wiring, but everything tested fine. In my experience, these ghost-in-the-machine problems, especially on this GMT800 platform, often point back to the PCM. Heat soak and vibrations can cause internal solder joints to fail intermittently. We swapped in a VIN-programmed PCM like this one, performed the security relearn, and the problem was gone for good. The pre-programmed module saved us hours of diagnostic guesswork and saved the customer from needing a tow to the dealer.
Is Your GM Truck Showing These Symptoms?
A failing PCM can cause a wide range of problems that can be misdiagnosed as sensor or mechanical failures. Before you start replacing expensive components, see if your vehicle is exhibiting these common signs of a bad engine computer. This is especially true if you see internal module error codes.
- âś” Unexplained Check Engine Light (CEL)
- âś” Engine cranks but refuses to start
- âś” Rough or unstable idling
- âś” Poor fuel economy
- âś” Harsh or delayed transmission shifting
- âś” Stalling for no apparent reason
- âś” Diagnostic Trouble Codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error), P0606 (PCM Processor Fault), or U0100 (Lost Communication With ECM/PCM).
Your Straightforward PCM Installation Guide
Replacing the PCM on these GM trucks is a manageable job for a DIYer with basic tools. Our pre-programmed module makes it even easier. While a security relearn procedure is required after installation, it doesn’t require any special scan tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most compatible trucks and SUVs, the PCM is located on the driver’s side of the engine bay, under or next to the battery tray.
- Disconnect Connectors: Carefully unplug the wiring harness connectors from the old PCM. They have locking tabs that need to be released. Note their color and position.
- Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the wiring harnesses in their correct positions.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: You must complete the GM security relearn procedure (often called the “Passlock Relearn”). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. Your vehicle will not start until this is done. Search online for the exact procedure for your model year.
Verified Compatibility for Your GM Truck or SUV
This module, part number 89017750, is a direct replacement for a wide range of popular GM vehicles. It is also compatible with service numbers 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your vehicle is on the list below. Providing your VIN at checkout is essential to ensure we load the correct software for your specific options.
Note: Specific engine sizes and option IDs may apply. Check the full list or contact us to confirm.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this number to access the latest official GM software for your exact model, year, and options. We then flash this software onto the PCM before shipping it to you.
Is this part difficult to install myself?
The physical installation is straightforward, requiring only basic hand tools to swap the module. The most important step is the security relearn procedure, which syncs the new PCM to your vehicle’s anti-theft system. This procedure does not require special tools and can be found online or in a service manual.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (like with code P0601), then yes, this will resolve the issue. However, if the light is on due to a bad sensor or another component, that separate issue will still need to be addressed.
What if I have a different service number on my original PCM?
This module is a direct replacement for several service numbers, including 12582605, 12589463, 12602802, 89017734, and 28042802. As long as your original part number is on this list, this module will function correctly once programmed to your VIN.
Do I need to send my old PCM back?
This listing does not require a core return. You can keep your old part, though we always recommend recycling electronics responsibly.