Is your 2004 GM truck or SUV running rough, stalling, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit, leaving you stranded and frustrated. Restore your vehicle’s core performance and reliability with this direct-fit engine computer, service number 12586242. This isn’t just a replacement part; it’s a complete solution. We pre-program the module to your vehicle’s unique VIN using the latest GM software updates, ensuring it’s ready for a straightforward installation right out of the box. Get back on the road with confidence and leave those persistent check engine lights in the rearview mirror.
Common Symptoms & Your Solution
If you’re experiencing any of the issues below, a faulty PCM is the likely cause. This Programmed 12586242 PCM is the definitive solution to correct these frustrating and often complex electronic problems:
- Erratic engine performance, including stalling, surging, or a rough idle
- Complete no-start or intermittent starting condition
- Poor fuel economy and loss of power
- Check Engine Light (CEL) with various Diagnostic Trouble Codes (DTCs)
- Communication errors with diagnostic scan tools
- Harsh or incorrect automatic transmission shifting
- Apparent failure of multiple sensors at once
Features & Benefits
- โ VIN-Programmed for You: Arrives flashed with your vehicle’s specific VIN and the newest GM software. This critical step ensures perfect communication between all vehicle systems and eliminates the need for an expensive trip to the dealership.
- โ Plug-and-Play Installation: Once you receive the module, the core installation is simple. In most cases, after performing a security relearn procedure, you’ll be ready to start the engine and drive.
- โ Restored Engine Performance: By installing a correctly functioning and updated computer, you restore the precise fuel delivery, spark timing, and transmission control your vehicle had when it was new.
- โ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others, ensuring a perfect fit for your 2004 Sierra, Silverado, Tahoe, Yukon, Escalade, and more.
- โ This unit is backed by our one-year replacement warranty.
A Word From The Workbench: Before you replace your PCM, do yourself a favor and check two things: your battery and your main ground connections. A weak battery or a corroded ground strap (especially the one from the engine block to the chassis) can cause bizarre electronic issues that mimic a failed computer. A few minutes with a wire brush and a wrench can sometimes save you a lot of headache and money. A healthy electrical foundation is key to a long-lasting repair. This Programmed 12586242 PCM is the brain, but it needs clean power to think clearly.
Frequently Asked Questions
Do I need to have this computer programmed?
No. We handle the programming for you before we ship it. Simply provide us with your vehicle’s VIN during or after checkout, and the module will arrive ready for installation.
Where is this module located on my vehicle?
On most of the compatible trucks and full-size SUVs (like the Silverado, Sierra, Tahoe, and Suburban), the PCM is located in the engine bay on the driver’s side, under the battery tray. On mid-size SUVs (like the Trailblazer, Envoy, and Rainier), it’s typically found next to the air filter box.
What information do you need from me?
All we need is your 17-digit Vehicle Identification Number (VIN). This allows us to load the exact, correct software and calibrations for your vehicle’s specific engine, transmission, and options.
Will I need to perform a security relearn procedure?
Yes, in most cases you will need to perform a security relearn (often called a Passlock or anti-theft relearn) after installation. This procedure is simple, requires no special tools, and typically takes about 30 minutes. It syncs the new PCM to your vehicle’s existing keys and anti-theft system.
How do I confirm this is the right part for my truck?
The best way is to match the service number on your original computer to one of the numbers listed, such as 12586242, YFKJ, YFKD, or YHTN. You can also use our vehicle fitment guide or contact us with your VIN, and we will be happy to verify compatibility for you.