Restore Your Vehicle’s Brain and Get Back on the Road
Is your 2004 GM truck or SUV running rough, shifting erratically, or showing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit, causing a host of frustrating issues that can leave you stranded. This professionally programmed Engine Control Module is the definitive, hassle-free solution to restore your vehicle’s performance, fuel economy, and reliability. It arrives ready to install, programmed specifically to your vehicle’s VIN with the latest GM software updates.
Common Symptoms of a Failing PCM & Your Solution
If you’re experiencing any of the following, a faulty module is the likely cause. This replacement unit is designed to solve these exact problems:
- Erratic or harsh transmission shifting
- Poor fuel mileage and engine performance
- Engine stalling, stumbling, or misfiring
- Complete no-start or intermittent starting condition
- Check Engine Light (CEL) with communication-related DTCs (e.g., P0601, P0606)
- Failure to pass emissions testing
By replacing your old unit with this pre-flashed 2004 Envoy XUV PCM, you are installing a reliable fix that addresses the root cause of these electronic issues.
Features & Benefits
- ✔ Plug & Drive Installation: Arrives pre-programmed to your vehicle’s unique VIN. No expensive trips to the dealership for programming are required.
- ✔ Updated GM Software: Flashed with the newest factory calibrations for optimal engine efficiency, emissions, and performance.
- ✔ Guaranteed Compatibility: A direct replacement for service numbers 12586242, 19299226, 89017738 and many more, ensuring a perfect fit and function.
- ✔ Solves Drivability Issues: Engineered to correct common electronic faults, restoring smooth operation and engine health.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Technician’s Note
As a technician with over two decades of experience, I’ve seen countless GM trucks and SUVs from this era sidelined by a faulty PCM. The biggest mistake owners make is installing a used, un-programmed unit from a salvage yard. This rarely works due to the integrated anti-theft system (VATS/PassLock). Our process of programming the module to your specific VIN before shipping bypasses this entire headache, saving you time, money, and the frustration of a vehicle that still won’t start. It’s the most reliable way to get your truck back to work without the dealership price tag.
This module is the core of your vehicle’s management system. Installing a quality, correctly programmed 2004 Envoy XUV PCM is critical for long-term dependability. Once you place your order, simply provide us with your VIN, and we’ll handle the complex programming. You’ll receive a component that’s ready for a straightforward installation and the simple security relearn procedure, getting you back on the road fast. Don’t let a bad computer keep your reliable GM vehicle down—this is the solution you need. The extensive fitment for this 2004 Envoy XUV PCM covers a wide range of popular models, including the Silverado, Sierra, Tahoe, Yukon, Escalade, and more.
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No. This module comes fully pre-programmed to your vehicle’s specific VIN. The only thing you may need to do is a simple security relearn procedure, which takes about 10-15 minutes and involves turning the key in the ignition. We provide instructions for this easy process.
How do I provide my VIN number?
After you complete your purchase, you can add your VIN to the ‘notes’ section of your order. If you forget, we will contact you via email to request it before we program and ship the part.
Will this fix my specific problem?
This PCM will correct any issues directly caused by a faulty computer. Please review the list of common symptoms. If you are unsure, it’s always best to have a qualified mechanic diagnose the vehicle to confirm the PCM is the point of failure.
Is this a brand new part?
This is a high-quality, fully tested replacement component that meets or exceeds original equipment specifications. It is prepared to provide dependable service for your vehicle.
What if my original part number isn’t on the list?
The provided list covers the most common service numbers this part replaces. However, GM used many different numbers. If you don’t see yours, please contact us with your VIN and original part number, and we will be happy to verify compatibility for you.
Where is this part located on my vehicle?
On most compatible models like the Envoy, Trailblazer, and Rainier, the PCM is located in the engine bay, next to the air box. On trucks and full-size SUVs like the Silverado, Sierra, and Tahoe, it is typically located under the battery on the driver’s side front.