Restore Your Truck’s Performance and Reliability
Is your 2004 Chevy Tahoe, Silverado, or other GM truck running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? A faulty Powertrain Control Module (PCM), often called the engine’s brain, is a common cause for these frustrating issues, leaving you stranded and questioning your vehicle’s dependability. This professionally programmed PCM, service number 12586242, is the direct-fit, reliable solution to restore your engine’s performance and get you back on the road with complete confidence.
Common Symptoms & Your Direct Solution
If you’re experiencing issues like poor fuel economy, harsh transmission shifting, a no-start condition, or multiple random diagnostic trouble codes (DTCs), your PCM is the likely culprit. Replacing it with a generic, non-programmed unit from a local parts store can lead to more problems, including anti-theft system lockouts and incorrect engine parameters. This module is the definitive 2004 Tahoe PCM replacement, programmed specifically to your vehicle’s VIN to ensure a seamless and correct repair. It’s not just a part; it’s a comprehensive solution to restore your vehicle to its proper operating condition.
Features & Tangible Benefits
- ✔️ Plug & Drive Installation: This PCM arrives programmed to your vehicle’s specific VIN. This essential step ensures full compatibility with your factory settings, anti-theft system (VATS/Passlock), and all vehicle options, greatly simplifying the installation process.
- ✔️ Optimized with Latest Software: We flash your module with the newest GM-released software updates available for your vehicle. This helps resolve common factory bugs and can lead to improvements in fuel economy, transmission shift points, and overall engine efficiency.
- ✔️ Guaranteed Compatibility: This unit is a direct replacement for service number 12586242 and other common service numbers, ensuring a perfect fit and function for your truck or SUV.
- ✔️ Solve Elusive Electrical Problems: A failing PCM can cause a cascade of confusing issues. This programmed replacement often resolves multiple problems at once, saving you from the costly guesswork of replacing individual sensors.
- ✔️ Peace of Mind Protection: This unit is backed by our one-year replacement warranty, giving you confidence and security in your repair.
A Note From The Technician: As a mechanic with over 20 years on the floor, I’ve seen countless owners chase expensive sensor and component replacements when the real culprit was the PCM. A classic sign is a cluster of unrelated error codes. Before you spend another dollar on parts, understand that a correctly programmed 2004 Tahoe PCM replacement like this one often resolves a whole host of electrical gremlins at once, saving you significant time, money, and frustration.
Cross-Reference & Verified Fitment
This computer will fit vehicles that came from the factory with any of the following service numbers. Please verify your original part number to ensure compatibility.
Service Numbers: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, YHTN
This part will fit these 2004 makes and models with these options:
- AVALANCHE 1500: (LH front under battery)
- ENVOY XL & XUV: 5.3L (next to air box)
- ESCALADE, ESV, EXT: (LH front under battery)
- HUMMER H2: (LH front under battery)
- ISUZU ASCENDER: 5.3L (LH engine)
- RAINIER: 5.3L (next to air box)
- SIERRA 1500 & DENALI: (LH front under battery), w/o hybrid, w/o 4.3L
- SIERRA 2500 & 3500: (LH front under battery), gasoline, 6.0L
- SILVERADO 1500: (LH front under battery), w/o hybrid, w/o 4.3L
- SILVERADO 2500 & 3500: (LH front under battery), gasoline, 6.0L
- SSR: (next to air box)
- SUBURBAN 1500 & 2500: (LH front under battery)
- TAHOE: (LH front under battery)
- TRAILBLAZER EXT: 5.3L (next to air box)
- YUKON & YUKON XL 1500/2500: (LH front under battery)
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot program and ship the module without it.
Will I need to do anything after installing this PCM?
In most cases, this is a plug-and-play installation. However, some GM vehicles of this era may require a simple, no-tool Security Relearn Procedure to sync the module with your key’s anti-theft chip. Some vehicles may also require a CASE (Crankshaft Angle Sensor Error) relearn, which can be performed by most professional scan tools.
Is this a brand new part?
This is a genuine, original equipment module that has been meticulously inspected, tested, and prepared to ensure it meets or exceeds factory specifications. It is then programmed with the latest software for your specific vehicle.
Will this fix my transmission shifting problems?
The PCM (also known as the ECM or ECU) controls both engine and transmission functions. Erratic shifting, getting stuck in a gear, or harsh engagement are very common symptoms of a failing module. A correctly programmed 2004 Tahoe PCM replacement is often the solution for these types of transmission issues.
How do I find my original part number?
Your original part’s service number is printed on a sticker on the module itself. On most of these trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, near the battery or airbox. The service number will be a multi-digit number, often starting with 125 or 890.