Restore Peak Performance to Your 2004 GM Truck or SUV
Is your 2004 Chevrolet Tahoe, Silverado, Suburban, or other compatible GM vehicle suffering from perplexing engine issues? An illuminated Check Engine Light, rough idling, stalling, or a complete no-start condition can often be traced back to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, the PCM is critical for managing everything from fuel delivery and spark timing to emission controls and transmission shift points. When it malfunctions, the entire vehicle’s performance and reliability are compromised.
This is a direct-fit replacement PCM, service number 12586242, which also replaces part numbers 89017738, 19299226, and others. We take the guesswork and hassle out of the repair process. Upon purchase, simply provide us with your vehicle’s VIN. Our technicians will then program the module with the latest, most up-to-date software directly from GM. This ensures that your new PCM is perfectly matched to your vehicle’s specific configuration, providing a true plug-and-play solution that restores factory performance and efficiency.
From the Diagnostic Bay
We had a 2004 GMC Yukon XL come into the shop with a frustrating, intermittent stalling problem. The owner had already replaced the fuel pump and a few sensors with no luck. The check engine light would come on and off, throwing a variety of seemingly unrelated codes. After hooking up our diagnostic scanner and monitoring live data, we noticed the PCM would occasionally lose communication just before the engine quit. After confirming all power and ground connections to the module were solid, we diagnosed a failing internal processor in the PCM. We installed a VIN-programmed unit just like this one, and the Yukon has been running flawlessly ever since. It’s a classic example of how a faulty computer can mimic other component failures.
Diagnosing a Faulty 2004 Tahoe PCM
A failing engine computer can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing several of the following symptoms, it’s highly likely your PCM is the culprit. Verifying the issue with a professional diagnostic scan is always recommended, but these are the common indicators of a failing module.
- ✔ Check Engine Light: The light is on, and you may have codes related to PCM internal failure (like P0601-P0606) or communication errors.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at idle, and you might experience random misfires that aren’t tied to a specific spark plug or coil.
- ✔ No-Start Condition: The engine cranks but refuses to start. This can happen if the PCM is not properly controlling the fuel injectors or ignition system.
- ✔ Poor Fuel Economy: A malfunctioning PCM can lead to inefficient engine operation, causing a noticeable drop in your MPG.
- ✔ Erratic Transmission Shifting: The PCM also controls transmission functions. Hard shifts, slipping, or failure to shift into gear can be signs of a computer problem.
- ✔ Failure to Communicate: Your mechanic’s diagnostic scan tool may be unable to establish a connection with the PCM.
Plug-and-Play Installation Process
Forget expensive trips to the dealership for programming. This module arrives ready for installation. Located on the driver’s side of the engine bay, typically under the battery tray on trucks and SUVs like the Tahoe, Sierra, and Escalade, replacing the PCM is a straightforward process. Once you provide your VIN, we handle all the necessary software flashing. This means no additional security relearn procedures or costly tool rentals are required. Simply disconnect the battery, swap the modules, reconnect the battery, and start your vehicle.
Wide GM Compatibility
This PCM is compatible with a vast range of 2004 General Motors vehicles equipped with 5.3L and 6.0L gasoline engines. Please verify that your original module’s service number is listed below to ensure a perfect match.
Compatible Service Numbers: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, YHTN.
Fits Models Including: Avalanche 1500, Escalade, Hummer H2, Sierra 1500/2500/3500, Silverado 1500/2500/3500, Suburban, Tahoe, Yukon, Envoy, Rainier, Trailblazer, SSR, and Isuzu Ascender. Always match your part number for guaranteed fitment.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle all the programming for you before shipment. All we need is your vehicle’s 17-digit VIN during checkout. This makes the unit ready for installation right out of the box.
Where is the PCM located on my 2004 Tahoe or Silverado?
On most 2004 GM full-size trucks and SUVs, the PCM is located in the engine compartment on the driver’s side, mounted to a bracket underneath the battery tray.
Is any special security relearn procedure needed after installation?
Because we program the module to your specific VIN, in most cases, no additional security relearn (like Passlock or Passkey) is required. It is designed to be a plug-and-play installation.
How do I find my vehicle’s VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard visible through the windshield. It is also typically on a sticker in the driver’s side door jamb.
Will this fix my transmission shifting problems?
If your transmission issues are caused by faulty signals or processing from the PCM, then yes, replacing it with this correctly programmed unit should resolve those problems. The PCM plays a vital role in controlling transmission shift solenoids and line pressure.