Restore Your Truck’s Brain and Get Back on the Road with Confidence
Is your 2004 GMC Yukon XL 2500 acting erratically? Stalling, shifting hard, or throwing confusing check engine lights? The Powertrain Control Module (PCM) is the central command center for your engine and transmission, and when it fails, it can cause a cascade of frustrating and concerning issues. This isn’t just about a light on the dash; it’s about the reliability you count on for work, family, and adventure. This direct-fit, expertly programmed PCM is your solution to restore that lost performance and peace of mind.
We take the complexity out of the repair. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable GM software specific to your truck. It arrives at your door ready for a straightforward installation, eliminating the need for expensive dealership programming or specialized tools. It’s the most effective way to solve the problem correctly the first time and get your Yukon running like it should.
Warning Signs Your PCM is Failing
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your 2004 Yukon XL PCM needs attention:
- ✔ Unexplained Check Engine Light (CEL) illumination.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or other communication errors.
- ✔ Rough or inconsistent engine idle.
- ✔ Poor fuel economy that has noticeably worsened over time.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, hesitation, or a complete no-start condition.
- ✔ Failure to pass state emissions testing.
A Technician’s Note: The VIN is Your Key to Success
I’ve seen it countless times in the shop: a customer buys a used computer online, installs it, and the truck still won’t start or runs worse than before. That’s because the PCM is not just a part; it’s a security device tied directly to your vehicle’s unique Vehicle Identification Number (VIN). Our programming service isn’t just a convenience—it’s a critical step that ensures the module communicates perfectly with your truck’s anti-theft system (Passlock/VATS), gauges, and other electronics. Providing the correct VIN is the single most important step for a successful, hassle-free repair.
Guided Installation for a Smooth Repair
Replacing your PCM is a manageable job for a confident DIYer. Follow these steps to get your truck back in top form.
- Safety First: Always begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Old PCM: On most 2004 GM trucks and SUVs like the Yukon, the PCM is located on the driver’s side of the engine bay, under the battery tray or near the airbox.
- Disconnect and Remove: Carefully unclip the color-coded wiring harness connectors. They have locking tabs that need to be released. Once the harnesses are free, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the wiring harnesses, ensuring each one clicks securely into place. They are keyed to prevent incorrect installation.
- Reconnect Power: Reattach the negative battery terminal and tighten it.
- Final Steps: Your truck is ready to start. In some cases, a security relearn procedure may be necessary, which typically involves cycling the key in the ignition. Your vehicle’s service manual will have the specific, simple steps if required.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for service numbers 12586242, 19299226, 89017738 and a wide range of specific RPO codes including YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. It is compatible with the following 2004 models:
- 2004 Cadillac Escalade, Escalade ESV, Escalade EXT
- 2004 Chevrolet Avalanche 1500
- 2004 Chevrolet Silverado 1500, 2500, 3500 (Gasoline)
- 2004 Chevrolet SSR
- 2004 Chevrolet Suburban 1500, 2500
- 2004 Chevrolet Tahoe
- 2004 Chevrolet Trailblazer EXT (5.3L)
- 2004 GMC Envoy XL, Envoy XUV (5.3L)
- 2004 GMC Sierra 1500, Sierra 2500, Sierra 3500 (Gasoline)
- 2004 GMC Sierra Denali
- 2004 GMC Yukon, Yukon XL 1500, Yukon XL 2500
- 2004 Hummer H2
- 2004 Buick Rainier (5.3L)
- 2004 Isuzu Ascender (5.3L)
By purchasing this pre-programmed 2004 Yukon XL PCM, you’re not just buying a part; you’re investing in a reliable, long-term solution that restores your vehicle’s performance and your confidence behind the wheel.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, no. Because we program the unit to your VIN, it should be a plug-and-play installation. Occasionally, some GM vehicles may require a simple security relearn procedure, which involves a few cycles of the ignition key and takes about 10-15 minutes. No special tools are needed for this.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my transmission shifting problems?
If the hard or erratic shifting is caused by faulty signals from the PCM, then yes, this part is very likely to solve the issue. The PCM controls both the engine and the transmission, and a failing module is a common cause of shifting problems.
Is this a used part?
This is a high-quality, fully tested OEM component that has been meticulously inspected and prepared for service. It is then programmed with the latest GM-certified software for your specific vehicle, ensuring OEM-level performance and reliability.
What if I have questions during installation?
We’re here to help! Our team of experienced technicians is available to provide support and answer any questions you may have during the installation process. Your success is our priority.