Is Your GM Truck or SUV Sidelined?
Is your 2004 GM truck or SUV running rough, shifting erratically, or refusing to start? A failing Powertrain Control Module (PCM) is often the hidden culprit, causing a cascade of frustrating issues that can leave you stranded. This pre-programmed PCM is the definitive, professional-grade solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Solution
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your PCM needs replacement:
- Harsh or erratic automatic transmission shifting
- Poor fuel economy and engine performance
- Engine stalling, stumbling, or a complete no-start condition
- Persistent Check Engine Light (CEL) with communication-related codes (e.g., P0601, P0606)
- Inability for scan tools to communicate with the module
This module is the direct fix for these problems. We take a genuine GM module and flash it with the latest official software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that every parameter, from fuel delivery to transmission shift points, is perfectly aligned with your factory settings. When you install our 2004 GMC Envoy XL PCM, you are restoring the brain of your vehicle to perfect working order.
Features & Real-World Benefits
- ✔ Plug & Drive Installation: This module arrives pre-programmed to your specific VIN. Simply install it, perform a quick security relearn procedure (instructions included), and you’re ready to go. No expensive trip to the dealership for programming is required.
- ✔ Latest GM Software: We flash each unit with the most current GM calibrations available. This often resolves underlying drivability issues that older software versions didn’t address, improving efficiency and performance.
- ✔ Guaranteed Compatibility: By programming to your VIN, we ensure this PCM communicates flawlessly with your vehicle’s other modules, such as the BCM and ABS, eliminating communication errors.
- ✔ Restored Drivability: Say goodbye to rough idling, poor acceleration, and unpredictable shifting. This is the solution for restoring the smooth, reliable operation you expect from your truck or SUV.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Insight: Why VIN-Specific Programming is Non-Negotiable
Over my 20 years diagnosing and repairing vehicles, I’ve seen countless headaches caused by generic, off-the-shelf modules. A PCM isn’t a one-size-fits-all part. Your vehicle—whether it’s a base model work truck or a fully-loaded Escalade—has a unique combination of options. VIN-specific programming ensures the computer knows everything from your tire size and gear ratio to whether you have a tow package. This precise calibration is the difference between a vehicle that simply ‘runs’ and a vehicle that runs correctly. We handle this critical step for you, so you get a professional result without the professional price tag.
This module is the correct replacement for units with service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN. If you have a faulty 2004 GMC Envoy XL PCM or a module for any of the vehicles listed below, this is the reliable solution you need.
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
Do I need to do any additional programming after installation?
No programming is needed. However, on most GM vehicles, you will need to perform a simple security relearn procedure, also known as a VATS relearn. This syncs the new PCM to your vehicle’s anti-theft system and can be done in your driveway with just the key. We include instructions for this easy process.
How do I provide you with my VIN?
After you complete your purchase, you will receive an email with a link to a secure form where you can submit your vehicle’s VIN. We cannot ship your part until we receive the VIN, as this is essential for programming.
Is this the correct part for my vehicle?
Please check the service number on your original module’s sticker. If it matches one of the numbers listed in this description (e.g., 12586242, 89017738, YHTN), and your vehicle is in the fitment list, then this is the correct part.
What’s the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. PCM (Powertrain Control Module) is most accurate for this part, as it controls both the engine and transmission functions. ECM (Engine Control Module) and ECU (Electronic Control Unit) are more generic terms. For this application, they all refer to the same computer.
Will this fix my check engine light?
If your check engine light is caused by an internal failure of the PCM, then yes, this will resolve the issue. After installation, it is recommended to clear all diagnostic trouble codes with a standard code reader to reset the system.