Get Your GM Truck, Van, or SUV Running Right Again
Is your 2004 GM vehicle suffering from frustrating, hard-to-diagnose engine problems? A faulty Powertrain Control Module (PCM) is often the hidden culprit behind issues like stalling, poor performance, or a persistent check engine light. This isn’t just an inconvenience; it’s a roadblock that keeps you from your work, your family, or your daily life. We offer the definitive solution: a reliable replacement PCM, professionally programmed to your vehicle’s exact Vehicle Identification Number (VIN) before it ever leaves our facility. This is the straightforward, no-hassle fix you’ve been looking for.
Common Symptoms of a Failing GM PCM & Your Solution
If you’re experiencing any of the following, a failing engine computer is a likely cause. This Programmed 2004 GM PCM 89017739 is designed to be the direct solution to these complex electrical headaches:
- No-Start or Hard Starting: The engine cranks but refuses to start, or only starts after many attempts.
- Engine Stalling or Misfiring: Your vehicle stalls unexpectedly at idle or while driving, often accompanied by a rough idle or misfires.
- Check Engine Light (CEL): A constant check engine light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-series codes.
- Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage.
- Failed Emissions Test: Inability to pass a smog or emissions inspection due to module-related faults.
- Erratic Transmission Shifting: The PCM also controls transmission functions, so harsh or incorrect shifting can point to a faulty module.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your vehicle’s specific VIN and the latest GM software updates. This ensures all systems, from the engine to the transmission and anti-theft system, function correctly upon installation.
- ✔ True Plug-and-Play Installation: Because the programming is done beforehand, you can avoid a costly and time-consuming trip to the dealership. In most cases, you can install it yourself and be back on the road quickly.
- ✔ Restored Performance & Efficiency: With updated software and correct parameters, this module restores the original power, throttle response, and fuel efficiency your vehicle was designed to have.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for OEM part numbers 89017739 and 12586243, ensuring a perfect fit and seamless integration with your vehicle’s wiring harness.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
“Many people don’t realize that a modern PCM is more than just a part; it’s a component coded specifically to one vehicle. Simply swapping a used module from another truck will almost always result in a no-start condition due to the anti-theft system (Passlock/VATS). Our VIN programming service isn’t just a convenience—it’s the critical step that makes the repair possible. We’re not just selling you a part; we’re delivering a fully integrated, vehicle-specific solution that works right out of the box.”
Don’t let a bad computer keep your reliable GM vehicle sidelined. By providing us with your VIN during checkout, you’re getting more than just a replacement part; you’re getting a fully prepared, ready-to-install core component. This Programmed 2004 GM PCM 89017739 is the key to solving those persistent electronic issues and restoring the dependable performance you rely on every day.
Frequently Asked Questions
What’s the difference between a PCM and an ECM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM is an ECM that also controls the transmission and other powertrain functions. For most modern vehicles, including the ones this part fits, PCM is the more accurate term.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the module until we have your VIN to program it.
Will I need to do anything after installing this PCM?
In many cases, the module is plug-and-play. However, some GM vehicles may require a security relearn procedure, which can often be done without special tools and takes about 30 minutes. A Crankshaft Variation Relearn (CASE relearn) may also be needed to clear a P1336 code, which requires a capable scan tool.
How can I be sure my old PCM is the problem?
While the symptoms listed above are strong indicators, it’s always best to have a professional diagnosis. Key signs include internal module fault codes (like P0601), a lack of communication with scan tools, or having ruled out all other possible causes like wiring, sensors, or fuel delivery issues.
Is this part compatible with my specific vehicle?
This module fits a wide range of 2004 GM models. Please review the detailed fitment list on this page. The most important step is providing your VIN; our programming process ensures it is a 100% functional match for your specific vehicle’s options and systems.