Restore Your Vehicle’s Performance and Reliability
Are you experiencing frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or a no-start condition in your GM truck or SUV? These are classic signs of a failing Powertrain Control Module (PCM). This computer is the brain of your vehicle, and when it falters, it can cause a cascade of problems that leave you stranded and guessing. Stop the guesswork and get back on the road with confidence with this direct-fit, professionally programmed engine computer.
Common Symptoms of a Failing PCM & Your Direct Solution
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re dealing with any of the following, your PCM is the likely culprit:
- Engine stalling or misfiring intermittently
- Failure to pass emissions tests
- Poor acceleration and overall engine performance
- Transmission shifting hard or at the wrong times
- Unexplained diagnostic trouble codes (DTCs)
- Complete engine shutdown or failure to start
This replacement unit is the definitive solution, engineered to resolve these issues and restore your vehicle to its factory-specified operation. Each 2004 Trailblazer EXT PCM 12586242 is meticulously programmed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a perfect match and optimal performance right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash this module with your specific Vehicle Identification Number, eliminating the need for an expensive trip to the dealership for programming.
- ✔ Plug & Play Installation: Once programmed, this unit is ready to be installed. In most cases, it’s a simple swap, though some vehicles may require a security relearn procedure (CASE learn), which can be done without special tools.
- ✔ Latest GM Software Updates: Your computer will arrive with the most current software from General Motors, addressing known bugs and improving drivability and efficiency over your original unit.
- ✔ Cost-Effective Solution: Avoid the high costs and long wait times associated with dealership repairs. This is a reliable and affordable way to get your truck or SUV running properly again.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Tip from a 20-Year Tech: Before installing your new PCM, take a moment to inspect your vehicle’s battery terminals and main engine grounds. A poor ground connection is a common cause of PCM failure. Ensuring your connections are clean, tight, and free of corrosion can prevent damage to your new computer and save you from future headaches. The success of your repair starts with a solid foundation.
Guaranteed Vehicle Compatibility
This Powertrain Control Module, part number 12586242, is a direct replacement for a wide range of 2004 General Motors vehicles. It is compatible with units bearing the following service numbers: 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. If your original module has any of these numbers, this is the correct part for you. This module is a common fix for many popular models, from the family-hauling Tahoe to the workhorse Silverado. When you need a reliable fix for your 2004 Trailblazer EXT PCM 12586242, this is your answer.
Frequently Asked Questions
Do I need to program this computer?
No. We handle all the programming for you before shipment. We will flash the module with the latest GM software using the VIN you provide, making it ready for installation upon arrival.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you can add your VIN to the order notes or reply to your order confirmation email. We will not ship the part until we have your VIN to ensure a perfect match.
Is this a simple plug-and-play installation?
For most vehicles, yes. You simply disconnect the battery, swap the old module with the new one, and reconnect the battery. Some vehicles may require a security or CASE relearn procedure, which can typically be performed without any special scan tools. Instructions are widely available online for this simple process.
What if my original part number doesn’t match 12586242 exactly?
Please check for one of the compatible service numbers listed in the description (e.g., 19299226, 89017738, YFKD, YFKF, etc.). This module replaces all the service numbers listed, making it the correct fit even if the number on your original part is different.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, giving you confidence in your repair.