Restore Your Truck’s Brain, Restore Your Drive
Is your 2004 Hummer H2, Silverado, or Sierra suddenly running rough, stalling, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit, leaving you stranded and frustrated. This isn’t just an inconvenience; it’s a loss of the power and reliability you depend on. This replacement PCM, service number 12586242, is the definitive solution to get your truck or SUV back to peak operational condition, programmed specifically for your vehicle.
Common Symptoms & Your Solution
A faulty PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, this module is your answer:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Poor fuel economy and sluggish acceleration
- Rough or erratic idling
- Engine stalling or cutting out unexpectedly
- Failure to communicate with diagnostic scan tools
Instead of chasing down endless sensor issues or wiring problems, address the core of the system. This is your opportunity to fix it right the first time with a reliable, pre-programmed engine computer. Our 2004 Hummer H2 PCM 12586242 is the key to resolving these complex electronic issues.
Features & Benefits
- โ Plug & Go Installation: We program this module to your vehicle’s specific VIN before shipping. This eliminates the need for expensive dealership programming, making the installation process straightforward.
- โ Latest GM Software: Your PCM will be flashed with the newest, most stable software updates from General Motors, ensuring optimal engine performance, transmission shifting, and fuel efficiency.
- โ Guaranteed Compatibility: This unit is a direct replacement for service number 12586242 and many others (see list below), ensuring a perfect fit and function for a wide range of GM trucks and SUVs.
- โ Restored Drivability: By correcting engine management functions, this module brings back the crisp throttle response and dependable operation you expect from your vehicle.
- โ One-Year Replacement Coverage: This unit is backed by our one-year replacement warranty, giving you complete peace of mind in your purchase.
From the Technician’s Bench: We had a 2004 Sierra 2500 in the shop that was a diagnostic nightmare. It had a ‘no-communication’ issue with the scan tool and would randomly stall. The owner had already replaced the battery and checked all the grounds. After confirming power and ground to the original PCM, we installed one of our pre-programmed units. The truck fired up instantly, the scan tool connected immediately, and it ran smoother than it had in years. This isn’t just a part; it’s the solution that saves you hours of frustration and gets the job done.
Fitment & Compatibility Information
This PCM is a direct fit for a wide array of 2004 GM vehicles. It is the correct replacement for units with service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN. Please verify the number on your original module to ensure a perfect match. Compatible models include, but are not limited to: Avalanche, Escalade, Envoy, Hummer H2, Rainier, Sierra, Silverado, SSR, Suburban, Tahoe, Trailblazer, and Yukon.
Getting your vehicle back to its powerful, reliable self is simple. Purchase this 2004 Hummer H2 PCM 12586242, provide us with your VIN, and we’ll handle the complex programming. You’ll receive a module that’s ready to install and restore your truck’s performance.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, you will receive an email with simple instructions on where to send your VIN. We cannot program and ship your module until we receive this information.
Will I need to do any additional programming after installation?
In most cases, you will need to perform a security relearn procedure, which can typically be done without special tools and takes about 30 minutes. Instructions are readily available online for your specific model. Some vehicles may also require a Crankshaft Variation Relearn (CASE), which can be done with a capable scan tool.
Is this a brand new computer?
This is a high-quality, fully tested engine computer that has been expertly prepared to meet and exceed all original factory specifications. It is programmed with the latest software for your vehicle.
My original part number isn’t on the list. Will this still work?
Our compatibility list is extensive but may not cover every single service number. If your number is different, please contact us with your VIN and original part number before ordering, and our experts will verify compatibility for you.
How quickly will I receive my part?
Once we receive your VIN, we typically program and ship the module within one business day. The final delivery time will depend on the shipping method you select at checkout.