Is Your Yukon Running Rough? Get a Reliable, Programmed PCM Solution.
If you’re dealing with a frustrating check engine light, erratic shifting, a no-start condition, or poor fuel economy in your 2003-2006 GMC Yukon, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is critical. I’ve spent two decades under the hoods of these GM trucks, and I can tell you that when the PCM starts to go, it can create a cascade of confusing problems that seem unrelated. This isn’t just a part; it’s the brain of your vehicle, and we provide a dependable, direct-fit solution.
This isn’t a generic, off-the-shelf module. We take your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and program this PCM with the latest, most stable software updates directly from GM. This ensures perfect communication with your truck’s other modules, restoring factory performance and efficiency.
Common Symptoms of a Failing GM PCM:
- โ Check Engine Light (CEL) with communication error codes (U-codes) or random sensor codes.
- โ Harsh, erratic, or delayed transmission shifting.
- โ Engine cranks but refuses to start.
- โ Stalling, stumbling, or rough idling for no apparent reason.
- โ A significant, unexplained drop in fuel mileage.
- โ The “Reduced Engine Power” message appearing on your dash.
From the Shop Floor: A Real-World Diagnosis
“A customer’s 2005 Yukon XL came in last week with what he was sure was a bad transmission. It was shifting hard from 1st to 2nd and sometimes wouldn’t shift into overdrive. He’d already spent money on a fluid flush with no change. After scanning it, I found no specific transmission codes, just a generic PCM communication fault. Instead of jumping to a costly transmission rebuild, we tested the PCM. We found the driver for the 1-2 shift solenoid was failing intermittently. Swapping in a properly programmed PCM like this one solved the ‘transmission’ problem completely. It’s a classic example of how a failing PCM can send you chasing the wrong issue.”
Plug-and-Play Installation: No Dealer Visit Required
Our goal is to get you back on the road with minimal hassle. Because we program the module to your VIN before shipping, you won’t need an expensive trip to the dealership for coding. The installation is straightforward for a DIYer with basic tools. This 2003-2006 Yukon PCM is a direct replacement.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most Yukons, Tahoes, and Silverados of this era, the PCM is located on the driver’s side of the engine bay, under the battery tray or next to the airbox.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old PCM. The levers can be stiff, so be gentle but firm.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the wiring harnesses. You should hear a distinct click.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Your vehicle will need to perform a simple security relearn procedure. Turn the key to the ‘ON’ position for 10-12 minutes (don’t start it). The security light should go out. Turn the key off for 10 seconds, then start the engine. Your vehicle is now ready to drive.
Guaranteed Compatibility and Quality
This module is a direct replacement for a wide range of GM trucks and SUVs. It is fully compatible with service part numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your part number or contact us with your VIN to confirm fitment for your specific vehicle, which may include various years of the Escalade, Avalanche, Sierra, Silverado, Suburban, Tahoe, Hummer H2, and more. Don’t let a faulty computer keep your truck down. Order your VIN-programmed 2003-2006 Yukon PCM today and restore its performance and reliability.