Restore Your Envoy’s Performance and Reliability
Is your 2004 GMC Envoy XUV running rough, stalling unexpectedly, or displaying a persistent check engine light? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and unpredictable issues. This isn’t just an inconvenience; it affects your vehicle’s performance, fuel economy, and overall dependability. This replacement engine computer is the definitive solution, arriving fully programmed to your vehicle’s specific VIN, ensuring you get a reliable part that’s ready to restore your truck to its original factory standards.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely cause. This module is the correct fix for:
- Erratic engine behavior, including rough idling or stalling
- Noticeable decrease in fuel efficiency
- Vehicle failing to start or intermittent starting problems
- Check Engine Light (CEL) that won’t go away
- Diagnostic Trouble Codes (DTCs) related to internal module failure (e.g., P0601, P0606)
- Transmission shifting issues or communication errors
By installing our expertly prepared 2004 GMC Envoy XUV programmed PCM, you are directly addressing the root cause of these problems, not just masking the symptoms. We handle the complex programming so you can focus on the installation.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN and the latest GM software updates, ensuring perfect communication with all onboard systems.
- ✔ Restored Engine Performance: Regain the smooth acceleration, stable idle, and crisp throttle response you expect from your 5.3L V8 engine.
- ✔ Optimized Fuel Economy: A properly functioning PCM ensures the correct air-fuel mixture, helping to restore your vehicle’s original MPG.
- ✔ Plug-and-Play Design: Once you perform the simple security relearn procedure, this unit is ready to go. No dealer visit required for programming.
- ✔ Guaranteed Compatibility: This is a direct replacement for OEM part numbers 89017739 and 12586243, ensuring a perfect fit and function.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on PCM Replacement
As a technician with over two decades of experience, I’ve seen countless drivers chase expensive sensor and component replacements only to find the core issue was the PCM itself. The brain of your vehicle’s engine management system must be 100% correct. That’s why pre-programming this 2004 GMC Envoy XUV programmed PCM to your VIN is so critical. It eliminates guesswork and prevents the compatibility conflicts that cause so many headaches with off-the-shelf, un-flashed modules. You’re not just buying a part; you’re buying a precise, reliable solution.
Frequently Asked Questions
Do I have to provide my VIN?
Yes. Providing your 17-digit Vehicle Identification Number (VIN) is essential. We use it to load the correct GM-certified software and calibrations for your specific vehicle, which guarantees compatibility and proper function.
Is this part difficult to install?
The physical installation is straightforward for someone with basic mechanical skills. It’s typically located next to the airbox. After installation, you will need to perform a simple security relearn procedure (often called a ‘key-on/key-off’ cycle) to sync the module with your vehicle’s anti-theft system. Instructions for this are widely available online or in service manuals.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM (like a P0601 code), this replacement unit is the correct fix. However, if the light is on due to other failing sensors or components, those issues will need to be addressed separately.
What is a security relearn procedure?
It’s a simple sequence of turning the ignition key on and off for set periods. This allows your vehicle’s Body Control Module (BCM) and anti-theft system to recognize and communicate with the new PCM. It does not require any special tools and typically takes about 30 minutes to complete.
How does the one-year warranty work?
This unit is backed by our one-year replacement warranty. If the module fails within one year of the purchase date due to an internal defect, we will provide a replacement unit.
Does this fit vehicles other than the Envoy XUV?
Yes, this versatile 2004 GMC Envoy XUV programmed PCM is also the correct module for a wide range of 2004 GM trucks, vans, and SUVs, including the Trailblazer, Rainier, Sierra, Silverado, and more. Please check the detailed fitment list on this page to confirm compatibility with your specific model.