Restore Peak Performance and Drive with Confidence
Is your truck or SUV feeling sluggish, unpredictable, or constantly flashing that dreaded check engine light? A failing Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, from poor fuel economy to a no-start condition. This isn’t just an inconvenience; it’s a matter of reliability and safety. Take control of your vehicle’s health with our pre-programmed Engine Control Module, a direct-fit solution for a wide range of 2004 GM vehicles. We take the guesswork out of the repair by flashing the unit with the latest GM software, perfectly matched to your vehicle’s VIN. It’s time to put an end to the uncertainty and get back to a smooth, powerful, and dependable drive.
A Mechanic’s Pro-Tip
Before replacing your engine computer, always perform a thorough check of your vehicle’s battery, terminals, and primary ground wires. A weak battery or a corroded ground connection can cause erratic voltage, mimicking the symptoms of a failed PCM. A few minutes of inspection can save you from a misdiagnosis and ensure your new module operates flawlessly from the start.
Signs Your Engine Computer Needs Attention
If you’re experiencing any of the following, a faulty PCM could be the cause. Replacing it can restore your vehicle’s factory performance and efficiency.
- ✔ Check Engine Light: Persistent illumination, especially with communication-related codes like P0601, P0602, or P0606.
- ✔ Erratic Engine Behavior: Stalling, rough idling, hesitation during acceleration, or sudden loss of power.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage.
- ✔ Shifting Problems: Harsh or delayed shifting in automatic transmissions, as the PCM controls transmission logic.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel injector or ignition coil commands.
- ✔ Failed Emissions Test: Inability to pass smog inspections due to module-related faults.
Guided Installation for Your 2004 Yukon Engine Computer
We’ve made this repair as straightforward as possible. With our pre-programmed module, you’re just a few simple steps away from a successful fix. No advanced tools are required.
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most GM trucks and SUVs from this era, the PCM is located in the engine bay, on the driver’s side, often near the airbox or under the battery tray.
- Disconnect and Remove: Carefully unplug the color-coded electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Unit: Mount your new, pre-programmed PCM securely onto the bracket. Reconnect the electrical harnesses, ensuring they click firmly into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Perform Security Relearn: Your vehicle’s anti-theft system will need to sync with the new computer. This typically involves a simple key-on/key-off procedure that takes about 30 minutes. Instructions are readily available online for your specific model. This final step is crucial for the engine to start and run.
Guaranteed Compatibility for Your Vehicle
This module is a direct replacement for service numbers 12586242, 19299226, and 89017738. It is professionally programmed to ensure perfect function for the following 2004 models:
- Cadillac: Escalade, Escalade ESV, Escalade EXT
- Chevrolet: Avalanche 1500, Silverado (1500, 2500, 3500), SSR, Suburban (1500, 2500), Tahoe, Trailblazer EXT
- GMC: Envoy XL, Envoy XUV, Sierra (1500, 2500, 3500), Sierra Denali, Yukon, Yukon XL (1500, 2500)
- Buick: Rainier (5.3L)
- Hummer: H2
- Isuzu: Ascender (5.3L)
To guarantee a perfect match, please provide your VIN after purchase. This allows us to load the exact software and updates for your truck’s specific configuration.
Frequently Asked Questions
Do I need to have this computer programmed again by a dealer?
No. We program the computer to the VIN you provide before shipping. The only procedure you may need to perform is a security relearn, which is a simple process you can do yourself in about 30 minutes with just your key.
How do I give you my vehicle’s VIN?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
Is this a simple plug-and-play installation?
Yes, it is designed to be. Once you physically install the module and perform the security relearn procedure, the vehicle will start and run correctly. No dealer visit is required.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM, or engine computer, also controls the transmission’s shifting patterns and behavior. If your shifting issues are caused by a faulty module, this replacement part will resolve them.
What if my original part number is not on your list?
The part numbers listed (12586242, 19299226, 89017738) cover a wide range of original service numbers. If you are unsure about compatibility, please contact us with your VIN and original part number before ordering, and we will verify the fitment for you.