Restore Your Vehicle’s Brain and Get Back on the Road with Confidence
Is your truck or SUV suffering from baffling electrical gremlins? A nagging check engine light, rough idling, or unpredictable stalling can turn any drive into a stressful ordeal. These aren’t just annoyances; they’re signs that your vehicle’s central command center—the Powertrain Control Module (PCM)—may be failing. This isn’t just a part; it’s the solution to reclaiming a smooth, dependable, and worry-free driving experience. We provide a professionally programmed PCM, flashed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a seamless and effective repair.
Warning Signs Your PCM Needs Attention
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, this module is the likely solution to restore your vehicle’s health.
- âś” Persistent Check Engine Light (CEL) with communication-related trouble codes (e.g., U0100, P0601, P0606).
- âś” Unexplained drops in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Engine stalling, stumbling, or misfiring for no apparent reason.
- âś” The vehicle cranks but refuses to start.
- âś” Failure to pass an emissions test due to module communication errors.
A Technician’s Note: Check the Basics First
“Before you’re certain the PCM is the culprit, I always tell my customers to do a quick health check on the battery and its connections. A weak battery, loose terminals, or a corroded ground wire can create voltage drops that make a perfectly good PCM act erratically. A few minutes with a wire brush and a wrench can sometimes save you a lot of diagnostic headaches. Ensure your foundation is solid before replacing the brain!”
Guided Installation for Your 2004 Envoy XUV PCM
Replacing your vehicle’s PCM is a straightforward process that you can confidently handle. Our module is sent ready for installation, taking the complexity out of the equation. Follow these simple steps to restore your vehicle’s performance.
- Safety First: Disconnect the Power. Pop the hood and disconnect the negative terminal from your vehicle’s battery. This essential step prevents any electrical shorts during the installation.
- Locate the Old Module. On most compatible vehicles, you’ll find the PCM in the engine bay, either next to the airbox or under the battery tray on the driver’s side. It’s a silver box with large electrical connectors.
- Perform the Swap. Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old PCM from its mounting bracket and set it aside. Secure the new, pre-programmed module in its place.
- Reconnect and Power Up. Firmly plug the wiring harnesses into your new PCM until they click securely into place. Reconnect the negative battery terminal you removed earlier.
- Final Step: Security Relearn. In many cases, you will need to perform a simple security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This usually involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for the specific, simple steps for your model.
Guaranteed Fit for Your GM Vehicle
This module is a direct-fit replacement, programmed to work seamlessly with a wide range of 2004 GM trucks and SUVs. Please verify your service number (found on the PCM’s white sticker) matches one of the following for guaranteed compatibility: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN.
This part is confirmed to fit the following 2004 models:
- âś” Buick Rainier (5.3L)
- âś” Cadillac Escalade, Escalade ESV, Escalade EXT
- âś” Chevrolet Avalanche 1500
- âś” Chevrolet SSR
- âś” Chevrolet Silverado & Sierra 1500, 2500, 3500 (Gasoline engines)
- âś” Chevrolet Suburban & Yukon XL 1500, 2500
- âś” Chevrolet Tahoe & GMC Yukon
- âś” Chevrolet Trailblazer EXT (5.3L)
- âś” GMC Envoy XL & Envoy XUV (5.3L)
- âś” GMC Sierra Denali
- âś” Hummer H2
- âś” Isuzu Ascender (5.3L)
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you simply provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the latest official GM software for your specific model, engine, and options. We then flash this software onto the module, so it arrives ready to communicate perfectly with your vehicle’s other systems.
Will I need a mechanic to perform any additional programming?
No. Our service handles all the necessary programming before shipment. The only post-installation step you may need to perform is a simple ‘security relearn’ procedure, which takes about 10-15 minutes and requires only your car key. This ensures the anti-theft system recognizes the new module.
Is this a new or a used part?
This is a high-quality, genuine OEM part that has been meticulously inspected, tested, and restored to its original factory specifications. It provides the same reliability and performance as a new unit from the dealer without the exorbitant cost.
How do I find my part or service number?
The service number is printed in large, bold characters on the white sticker affixed to your current PCM. It’s the most reliable way to confirm a match. This module replaces service numbers 12586242, 19299226, 89017738, and many others listed above.
What if my vehicle isn’t running well after installation?
Since the module is pre-programmed and tested, post-installation issues often point to an underlying mechanical or electrical problem that the old, faulty PCM may have been masking. We recommend re-checking all connections and ensuring the security relearn procedure was completed successfully. If issues persist, it’s wise to check for other potential problems like faulty sensors or wiring.