Is your GMC Yukon XL or another GM truck giving you headaches with unpredictable stalling, a persistent check engine light, or rough running conditions? As a technician with over two decades of experience under the hood, I’ve seen these exact issues countless times. More often than not, the culprit is a failing Powertrain Control Module (PCM)—the central computer for your engine. This isn’t just a part; it’s the brain of your vehicle, and when it falters, everything from fuel economy to transmission shifting can be affected.
We offer a dependable and straightforward solution. This is a replacement PCM, compatible with service number 12582605, that arrives at your door fully programmed to your specific vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable software from General Motors. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money. You get a reliable part that’s ready for installation right out of the box.
Case Study: A Tricky Diagnosis
I remember a 2005 Silverado 2500 that came into my shop. The owner was frustrated; he’d already replaced the throttle body and multiple sensors trying to fix an intermittent stalling problem that never set a consistent code. After hooking up my diagnostic scanner and monitoring live data, I noticed the injector pulse width was behaving erratically just before it would stall. A deep dive into the PCM’s circuitry revealed a failing driver. We installed a VIN-programmed PCM just like this one, and the truck ran perfectly. It’s a classic example of how a faulty module can mimic other component failures, making a proper diagnosis key.
Is Your GM Truck Showing These Telltale Signs?
A failing PCM can cause a wide range of confusing symptoms. If you’re experiencing any of the following, this module is a likely solution:
- ✔ Unexplained check engine light with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Sudden stalling or sputtering, especially after the engine has warmed up.
- ✔ Noticeably poor fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test.
- ✔ Communication errors with diagnostic scan tools.
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 simpler.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most compatible trucks and SUVs, the PCM is located in the engine bay on the driver’s side, near the battery and airbox.
- Disconnect the Harnesses: Carefully release the locking tabs and unplug the wiring harnesses from the old PCM. There are typically two or three large connectors.
- Remove the Old Module: Unbolt the old 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. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a Passlock or Passkey relearn) so the vehicle recognizes the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times.
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 GM vehicles, including:
ESCALADE, ESV, EXT 03-06
HUMMER H2 03-07
ISUZU ASCENDER 03 (5.3L)
SIERRA 1500, 2500, 3500 (Gasoline) 03-07 (Classic Style)
SIERRA DENALI 03-07 (Classic Style)
SILVERADO 1500, 2500, 3500 (Gasoline) 03-07 (Classic Style)
SSR 03
SUBURBAN 1500, 2500 03-06
TAHOE 03-06
TRAILBLAZER EXT 03 (5.3L)
ENVOY XL 03 (5.3L)
YUKON & YUKON XL 1500/2500 03-06
Note: Please verify your part number or consult the detailed fitment list if unsure. For 2004 models, matching the ID 12602802 is often required.
Frequently Asked Questions
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot program and ship the module without it.
Is any additional programming required after installation?
No. The module arrives fully flashed with the latest GM software for your vehicle’s engine and transmission. You will only need to perform the standard security relearn procedure, which does not require any special tools.
What is the security relearn procedure?
It’s a simple process that syncs the new PCM with your vehicle’s anti-theft system. Generally, it involves cycling the ignition key. Instructions are readily available online for your specific model, or you can ask us for guidance.
Will this fix my specific problem?
This PCM resolves issues directly caused by a faulty module, such as internal processor errors (P0601) or communication failures. While it fixes many common symptoms, we always recommend a proper diagnosis to confirm the PCM is the root cause of the problem.
Does this part work for both 2WD and 4WD models?
Yes. The programming we perform using your VIN accounts for all of your vehicle’s specific options, including the drivetrain, engine size, and transmission type.