Is Your GM Truck or SUV Acting Up? Let’s Get It Fixed.
As a technician with two decades of experience under the hood, I’ve seen it all when it comes to GM electronics. If your 2003-2006 Yukon XL 1500 is stalling, shifting erratically, or throwing a check engine light that has you stumped, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just a part; it’s the brain of your engine, and when it starts to fail, it can cause a cascade of frustrating, hard-to-diagnose problems.
A customer’s 2005 Silverado came in last week with these exact symptoms. It would crank but not start, and the security light was flashing. After ruling out the basics, we traced the issue to a communication failure within the original PCM. Instead of a costly trip to the dealer for diagnostics and programming, we installed one of these pre-programmed modules. The truck fired right up, and the customer was back on the road in less than an hour. That’s the simple, effective solution we’re offering you.
The Direct Solution for Common PCM Failures
This isn’t a generic, one-size-fits-all part. This is a genuine OEM replacement PCM, service number 89017750, that we professionally program to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures all factory settings and the latest GM software updates are loaded, making the installation process seamless. It’s the key to restoring your vehicle’s original performance and reliability.
- โ Eliminate No-Start Conditions: Fixes issues where the engine cranks but won’t start due to lack of fuel or spark command.
- โ Resolve Erratic Shifting: Restores proper communication with the transmission control module for smooth, predictable gear changes.
- โ Clear Persistent Check Engine Lights: Solves internal processor faults and communication codes (U-codes) that won’t go away.
- โ Fix Stalling and Rough Idle: Corrects improper fuel mixture and ignition timing calculations for a stable engine.
- โ VIN-Programmed for You: Arrives ready to install with the latest GM software updates for your specific vehicle. No additional programming needed.
Expert Pro Tip: Check Your Connectors!
Before installing your new PCM, take a close look at the wiring harness connectors. On these GM trucks, the PCM is located under the battery tray. Over time, battery acid can leak and drip down, causing severe corrosion (a green or white crust) on the PCM connectors. This corrosion can cause intermittent issues and even damage the new module. Clean any corrosion thoroughly with a terminal cleaner and a small brush before plugging in your new part.
Easy, DIY-Friendly Installation for Your 2003-2006 Yukon XL 1500 PCM
You don’t need to be a master mechanic to replace this module. With a few basic hand tools, you can get the job done right in your own driveway. This part is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system to discharge.
- Locate the PCM: On most compatible models like the Yukon, Silverado, and Tahoe, the PCM is located on the driver’s side of the engine bay, under the battery tray. You may need to remove the battery to access it.
- Disconnect the Harnesses: Carefully unplug the electrical connectors from the old PCM. There are typically two or three large connectors with locking tabs.
- Remove the Old Module: Unbolt the PCM from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM, reconnect the wiring harnesses securely, and reinstall the battery.
- Perform Security Relearn (If Needed): In some cases, a simple 10-30 minute key-on security relearn procedure is required. We provide easy-to-follow instructions for this.
Order today and provide your VIN at checkout. We’ll handle the programming, so you can handle the straightforward installation and get your truck running like new again.