Restore Peak Performance to Your GM Truck
Is your truck suffering from puzzling performance issues, a persistent check engine light, or frustrating starting problems? The Powertrain Control Module (PCM) is the central command center for your engine and transmission, and when it falters, it can cause a wide range of symptoms that are difficult to diagnose. This isn’t just an inconvenience; it’s a matter of reliability and confidence in your vehicle. Get back the smooth, dependable power you rely on with this direct-fit, VIN-programmed PCM, service number 12586242.
We take the guesswork and complexity out of the repair. Instead of paying for expensive dealership programming or dealing with complicated flashing tools, this module arrives at your doorstep ready to install. We use your vehicle’s unique VIN to load the latest, most stable factory software from GM, ensuring all parameters are perfectly matched to your truck’s specific configuration. This is the key to a successful, long-lasting repair that restores both performance and your peace of mind.
Signs Your PCM Needs Attention & The Benefits of This Solution
A failing engine computer can manifest in many ways. If you’re experiencing any of the following, this module is the definitive solution to get your truck running right again.
- ✔ Check Engine Light On: Specifically for internal module codes like P0601, P0602, P0606, or other communication-related DTCs.
- ✔ Erratic Engine Behavior: Solves issues like random stalling, rough idling, hesitation during acceleration, and mysterious misfires.
- ✔ Poor Fuel Economy: A properly functioning PCM ensures optimal fuel delivery and ignition timing, restoring your truck’s efficiency.
- ✔ No-Start Condition: If the PCM isn’t communicating correctly, it can prevent the engine from starting at all.
- ✔ Transmission Shifting Problems: Corrects harsh or delayed shifting by restoring proper communication between the engine and transmission.
- ✔ Plug-and-Play Installation: Arrives pre-programmed to your VIN, eliminating the need for a trip to the dealership.
From a Seasoned Tech: The Ghost in the Machine
I once had a customer with a 2004 Sierra who was at his wit’s end. He’d replaced plugs, wires, and even a fuel pump chasing an intermittent, violent bucking issue that never threw a specific code. It was a classic ‘ghost in the machine.’ After checking all the grounds and wiring, we finally suspected the computer. We swapped in a VIN-programmed module like this one, and the change was immediate. The truck ran smoother than it had in years. It’s a powerful reminder that sometimes, the problem lies with the brain, and a fresh, correctly programmed 2004 Silverado 1500 PCM is the only true fix.
Guided Installation for a Confident Repair
Replacing your PCM is a straightforward job you can tackle with basic hand tools. Follow these steps to get your truck back on the road quickly.
- Safety First: Always disconnect the negative terminal of your vehicle’s battery and wait 10-15 minutes to allow the system to fully discharge.
- Locate the Module: On most 2004 GM trucks like the Silverado and Sierra, the PCM is located on the driver’s side, under the battery tray. You will need to remove the battery to access it.
- Disconnect the Connectors: Carefully unlatch and remove the electrical harness connectors from the old PCM. Inspect them for any corrosion or damage.
- Swap the Modules: Unbolt the old PCM from its bracket and install the new one in its place.
- Reconnect Everything: Securely plug the harness connectors into the new PCM until they click into place. Reinstall and reconnect the battery.
- Security Relearn Procedure: After installation, you may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows your vehicle’s anti-theft system to recognize the new module.
Tailored Fit for Your Ride
This module is the correct replacement for a wide range of GM vehicles. Please verify your service number (found on the module’s sticker) matches one of the numbers listed below to ensure perfect compatibility. This is the correct 2004 Silverado 1500 PCM for your repair.
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFXL
SSR 04 Electronic Control Module; (next to air box), ID YHTN
SIERRA DENALI 04 Electronic Control Module; (LH front under battery), ID 12586242
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFKX
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFKH
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFKJ
SSR 04 Electronic Control Module; (next to air box), ID YFKD
SSR 04 Electronic Control Module; (next to air box), ID YFKX
SSR 04 Electronic Control Module; (next to air box), ID YFXL
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFXP
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFXL
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFXM
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFXN
SIERRA 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12586242
SILVERADO 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12586242
SUBURBAN 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12586242
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFXN
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFKH
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFXL
SSR 04 Electronic Control Module; (next to air box), ID YFKF
SSR 04 Electronic Control Module; (next to air box), ID YFKH
SSR 04 Electronic Control Module; (next to air box), ID YFXM
SSR 04 Electronic Control Module; (next to air box), ID YFXN
SILVERADO 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12586242
YUKON 04 Electronic Control Module; (LH front under battery), ID 12586242
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFKX
ESCALADE 04 Electronic Control Module; (LH front under battery), ID 12586242
AVALANCHE 1500 04 Electronic Control Module; (LH front under battery), ID 12586242
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFXP
ESCALADE ESV 04 Electronic Control Module; (LH front under battery), ID 12586242
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFXP
ISUZU ASCENDER 04 Electronic Control Module; (LH engine), 5.3L
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFXM
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YHTN
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YHTN
TAHOE 04 Electronic Control Module; (LH front under battery), ID 12586242
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YHTN
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFKD
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFKD
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFXL
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFKJ
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFKD
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFKJ
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFKF
HUMMER H2 04 Electronic Control Module; (LH front under battery), SUT
SSR 04 Electronic Control Module; (next to air box), ID YFKJ
SUBURBAN 1500 04 Electronic Control Module; (LH front under battery), ID 12586242
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFXP
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFXM
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFKH
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFKF
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFKJ
SILVERADO 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12586242
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFKH
YUKON XL 1500 04 Electronic Control Module; (LH front under battery), ID 12586242
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFKF
ENVOY XL 04 Electronic Control Module; 5.3L (next to air box), ID YFXN
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFKX
SIERRA 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12586242
SIERRA 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12586242
TRAILBLAZER EXT 04 Electronic Control Module; 5.3L (next to air box), ID YFXM
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFKD
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFKF
ENVOY XUV 04 Electronic Control Module; 5.3L (next to air box), ID YFXN
ESCALADE EXT 04 Electronic Control Module; (LH front under battery), ID 12586242
RAINIER 04 Electronic Control Module; 5.3L (next to air box), ID YFKX
SSR 04 Electronic Control Module; (next to air box), ID YFXP
YUKON XL 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12586242
Frequently Asked Questions
What does ‘VIN-Programmed’ mean?
It means we load the specific software your vehicle needs based on its Vehicle Identification Number (VIN). This ensures the PCM works perfectly with your engine, transmission, and options, just like the original one from the factory. You must provide your VIN after purchase so we can program the module before shipping.
Is this part truly ‘plug and play’?
For most vehicles, yes. After installing the module, you will likely need to perform a simple ‘security relearn’ procedure, which pairs the new PCM with your vehicle’s anti-theft system. This procedure is easy to do and does not require special tools. We include instructions to guide you.
My original part number is different. Will this still work?
This module, service number 12586242, replaces several other service numbers and broadcast codes (like YFKF, YFKH, etc.). As long as your vehicle is on the compatibility list and your original part number is one of the listed interchanges, this module will function correctly once programmed to your VIN.
What if I still have problems after installation?
While this PCM will solve issues caused by a faulty module, it’s important to ensure other potential problems (like bad wiring, sensors, or grounds) have been ruled out. Our team of experienced technicians is here to help with diagnostic advice if you encounter any issues after installation.
Do I need to send my old PCM (core) back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.