If you’re dealing with frustrating, hard-to-diagnose issues in your GMC Yukon or other GM truck, the Powertrain Control Module (PCM) is often the culprit. As a technician with over 20 years of experience, I’ve seen it all: unexplained stalling, erratic shifting, a dashboard lit up like a Christmas tree, and performance that just isn’t what it used to be. These aren’t just annoyances; they’re signs that your vehicle’s ‘brain’ is failing.
This isn’t just a replacement part; it’s a complete solution. We take the hassle and high cost out of the equation by pre-programming this PCM with the latest official GM software updates, tailored specifically to your vehicle’s VIN. This means you can skip the expensive trip to the dealership for programming. You get a reliable module that’s ready for installation right out of the box, restoring your truck’s original performance and efficiency.
Case Study: A Tricky Diagnosis
I remember a 2005 Tahoe that came into the shop. The owner had been to two other places chasing an intermittent no-start and random stalling issue. No one could find the cause. After checking the basics, I hooked up my professional scan tool and saw intermittent communication loss with the PCM. The module wasn’t throwing a hard code every time, making it difficult to pinpoint. We swapped in a VIN-programmed PCM like this one, performed the quick security relearn, and the truck fired up perfectly. The customer called a month later to say his Tahoe had never run better. It’s often these internal electronic faults, not a mechanical issue, that cause the biggest headaches.
Is Your Truck Showing These Symptoms?
A failing PCM can cause a wide range of problems. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with codes like P0601, P0605, or P0606 (Internal Control Module errors).
- ✔ Your vehicle won’t start, or it starts and immediately stalls.
- ✔ The engine runs rough, misfires, or hesitates during acceleration.
- ✔ Unexplained drop in fuel mileage.
- ✔ The transmission shifts harshly, erratically, or at the wrong times.
- ✔ Communication errors with other modules on the vehicle’s network (U-codes).
A Straightforward Guide to Your PCM Swap
Replacing the PCM on these GM trucks is a job most DIYers can handle in their own driveway. Our pre-programmed module makes it even easier. Follow these general steps to get back on the road:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, often near or under the battery tray.
- Disconnect the Connectors: Carefully unclip and remove the wiring harness connectors from the old PCM. These connectors have locking tabs, so be gentle to avoid damage.
- 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 onto the bracket and securely re-attach the wiring harness connectors. Ensure they click into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This can typically be done without special tools by cycling the key. Instructions are readily available online for your specific model.
Verified Vehicle Compatibility List
This module, part number 28042802, is a direct replacement for multiple GM service numbers including 89017750, 12582605, 12589463, 12602802, and 89017734. It fits a wide range of popular GM trucks and SUVs. Please verify your model and year from the list below. Note that some 2004 models require matching the ID number 12602802.
- Cadillac Escalade, ESV, EXT: 2003-2006
- Chevrolet Avalanche 1500: 2003-2006
- Chevrolet Silverado 1500, 2500, 3500: 2003-2007 (Classic body style for ’07)
- Chevrolet Suburban 1500, 2500: 2003-2006
- Chevrolet Tahoe: 2003-2006
- Chevrolet SSR: 2003
- GMC Envoy XL: 2003 (5.3L)
- GMC Sierra 1500, 2500, 3500 & Denali: 2003-2007 (Classic body style for ’07)
- GMC Yukon & Yukon XL 1500/2500: 2003-2006
- Hummer H2: 2003-2007
- Isuzu Ascender: 2003 (5.3L)
- Oldsmobile Bravada: 2003
- Buick Rainier: 2004
- Chevrolet Trailblazer EXT: 2003 (5.3L)
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Is this part difficult to install?
No, this is a very DIY-friendly repair. The module is typically easy to access, and since we pre-program it, you won’t need any special computer equipment. You will only need to perform a simple key-cycle security relearn procedure.
What is a security relearn procedure?
It’s a simple process that syncs the new PCM to your vehicle’s anti-theft system. For most GM vehicles of this era, it involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this two more times. Your vehicle will not start until this is completed.
Will this fix my specific problem?
This PCM corrects issues directly caused by a failing module, such as internal processor faults (P0601), poor performance, and no-start conditions. While it solves the most common electronic problems, ensure your vehicle’s mechanical components and wiring are in good condition.
Does this PCM come with the latest software?
Yes. We flash every module with the most current GM-released calibration for your specific VIN. This ensures optimal performance, fuel economy, and transmission function.