Get Your GM Vehicle Back on the Road, Fast.
Is your 2004 GM truck, van, or SUV suddenly running rough, shifting erratically, or plagued by an illuminated Check Engine Light? A failing Powertrain Control Module (PCM), also known as an Engine Control Module (ECM), is often the culprit behind these frustrating and complex issues. It’s the brain of your vehicle, and when it falters, everything from performance to fuel economy suffers. This replacement module is your direct-fit, reliable solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms of a Failing GM ECM & Your Solution
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a failing module is a likely cause:
- Persistent Check Engine Light (CEL) with codes like P0601, P0602, or P0606
- Unexplained drops in fuel efficiency
- Rough idling or stalling
- Harsh or erratic automatic transmission shifting
- Engine misfires or loss of power
- Complete no-start condition where the engine cranks but won’t fire
- Communication errors with diagnostic scan tools
This isn’t just a replacement part; it’s a complete solution. We eliminate the most difficult step of the repair by programming the module specifically for your vehicle before it ships. Using the VIN you provide, we flash it with the latest GM software updates, ensuring it communicates perfectly with your engine, transmission, and security systems right out of the box. This is the most effective way to solve the problem correctly the first time, using a dependable programmed 89017739 PCM.
Features & Benefits
- ✔ Plug & Drive Installation: Arrives pre-programmed to your vehicle’s specific VIN. No need for expensive dealership tools or additional programming.
- ✔ Restored Performance: Corrects issues like poor fuel economy, rough idle, and hesitation by restoring factory engine and transmission parameters.
- ✔ Latest GM Software: Flashed with the newest vehicle-specific updates from General Motors to ensure optimal operation and efficiency.
- ✔ Guaranteed Compatibility: By using your VIN, we ensure this module is a perfect match for your vehicle’s options and systems.
- ✔ Cost-Effective Repair: A smart, affordable alternative to the high costs and scheduling hassles of a dealership service center.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
In modern vehicles, the PCM is the central hub. It’s tied directly to your vehicle’s anti-theft system (VATS/Passlock), transmission behavior, and even the instrument cluster. Simply installing a non-programmed module from another vehicle will almost always result in a no-start condition or severe operational problems. Our VIN-specific programming service ensures that this new brain is a perfect digital handshake for your vehicle’s body, creating seamless integration and preventing a host of frustrating compatibility errors that can leave you stranded.
Take control of your repair and get your vehicle running like it should. This programmed 89017739 PCM is the reliable heart your GM vehicle needs to perform its best. Whether you’re hauling tools in a Sierra 3500, taking the family on a trip in a Suburban, or enjoying a cruise in your Corvette, this module is the key to restoring its dependability.
Frequently Asked Questions
Do I absolutely need to provide my VIN?
Yes. Providing your 17-digit Vehicle Identification Number (VIN) is essential. We use it to load the correct, vehicle-specific software and operating system onto the module, ensuring it works perfectly with your engine, transmission, and options package. We cannot ship the module without your VIN.
Is any additional programming required after I install it?
No. This module is designed to be a plug-and-drive solution. Because we program it to your VIN before shipping, you will not need to take it to a dealer or mechanic for further programming. In some cases, a Case Relearn or security relearn procedure may be necessary, which can be done with a capable scan tool or by following a simple key-cycle procedure.
What’s the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECM stands for Engine Control Module, and it is the most common term. PCM, or Powertrain Control Module, typically controls both the engine and the transmission. ECU (Engine Control Unit) is a more generic term. For this application, the terms refer to the same part: your vehicle’s main computer.
How do I know for sure that my original module is bad?
While the symptoms listed above are strong indicators, it’s always best to have a professional diagnosis. Common signs include specific internal module fault codes (like P0601), no communication with a scan tool, or having ruled out all other possible causes for a driveability issue (like sensors, wiring, or fuel delivery).
Where is this module located on my vehicle?
The location varies by model. On many GM trucks and large SUVs (like the Suburban, Sierra, Silverado), it is located under the hood, on the driver’s side, often under or near the battery tray. On vans (Express, Savana), it’s typically in the rear of the engine compartment on the driver’s side. Always consult a repair manual for your specific vehicle to confirm the location before beginning work.
What does the warranty cover?
This unit is backed by our one-year replacement warranty. This covers the module itself against defects in function or workmanship for a full year from the date of purchase.