Restore Peak Performance to Your GM Truck or SUV
Is your GMC Yukon, Sierra, or other GM vehicle running rough, throwing confusing check engine lights, or refusing to start? The Powertrain Control Module (PCM) is the central computer of your vehicle, managing everything from fuel mixture and ignition timing to transmission shifting. When it fails, it can cause a host of frustrating and difficult-to-diagnose problems. This direct-replacement PCM, part number 12589463, is the reliable solution to get your truck back on the road and running like new.
We take the guesswork and high cost out of the repair. Unlike a generic module from a parts store or a salvage yard, this unit arrives at your door pre-programmed with the latest official GM software updates, specifically matched to your vehicle using your VIN. This eliminates the need for expensive dealership programming, making it a straightforward fix for both seasoned mechanics and dedicated DIYers.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2005 Tahoe that came into my bay with a laundry list of intermittent complaints: stalling at red lights, hard shifting out of nowhere, and a check engine light that would come and go. The owner had already replaced the throttle body and a few sensors with no luck. After hooking up my scan tool, I noticed communication loss codes (U0100) alongside a history of random misfires. This pointed away from a single component and toward the network’s hub. We tested the power and grounds to the PCM—they were solid. The culprit was internal failure of the original module. Installing a VIN-programmed 2003-2006 Yukon PCM like this one resolved all issues in a single visit, saving the customer from more wasted time and money.
Is Your Truck Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, a faulty module could be the root cause:
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606 (Internal Control Module Failure) or U-series communication codes.
- ✔ Engine cranks but will not start.
- ✔ Rough or unstable idle.
- ✔ Poor fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling or cutting out unexpectedly.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in under an hour. Our pre-programmed module makes it even simpler. Here’s a typical process:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most compatible models (like the Silverado, Sierra, and Yukon), the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.
- Disconnect the Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old PCM. The levers can be delicate, so apply steady pressure.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New PCM: Mount your new, pre-programmed module in place and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses back into the new PCM until they click and lock. Reconnect the negative battery terminal.
- Security Relearn Procedure: In some cases, you may need to perform a simple security relearn. This usually involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s service manual will have the specific steps.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of General Motors vehicles. Please verify your part number or consult the detailed fitment list provided on this page to ensure it is the correct part for your specific truck or SUV. This part is a confirmed fit for many popular models, including the Chevrolet Silverado, GMC Sierra, Cadillac Escalade, Hummer H2, and of course, the 2003-2006 Yukon PCM applications.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your vehicle had when it left the factory, including any official updates from GM. This ensures perfect compatibility with your engine, transmission, and options package.
Is any additional programming required after installation?
No. This PCM is shipped fully programmed and ready for installation. In some cases, a simple ‘Security Relearn’ procedure, which does not require any special tools, may be necessary. We include instructions for this common procedure.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your old PCM (common codes include P0601-P0606), then this part is the correct fix. It is crucial to properly diagnose the vehicle first, as other failing sensors or wiring issues can also trigger a check engine light.
Where is the PCM located on my 2004 GMC Yukon?
On most 2003-2006 Yukon, Tahoe, Suburban, and pickup models, the PCM is located in the engine compartment on the driver’s side, mounted to a bracket near the battery and firewall.
What if I order the wrong part?
We strongly encourage you to match your original part number or use the compatibility list. Providing your VIN during checkout is the best way to guarantee a correct match, as we will verify it before programming and shipping.