Is Your GM Truck or SUV Experiencing Frustrating Issues?
If your Chevrolet Tahoe, Silverado, Suburban, or another compatible GM vehicle is suffering from erratic engine behavior, a persistent Check Engine Light, or even a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, the PCM’s health is critical for performance, fuel economy, and reliability. This direct-fit replacement PCM, part number 89017750, is the definitive solution to restore your vehicle’s factory operation.
The Plug-and-Play Solution: Programmed to Your VIN
Don’t waste time and money on a trip to the dealership. We take the guesswork and hassle out of the replacement process. When you order, simply provide us with your vehicle’s VIN. Our technicians will then program this module with the latest, most stable software updates directly from GM. This ensures that when the part arrives, it’s specifically calibrated for your vehicle’s engine, transmission, and options, making the installation process as straightforward as possible.
From the Diagnostic Bay
We had a 2005 Silverado 2500 come in with a random misfire code (P0300) that just wouldn’t go away. The owner had already replaced all the spark plugs, wires, and even the coil packs. After hours of diagnostics, we traced the issue back to a weak driver circuit inside the original PCM. The injectors on one bank weren’t getting a consistent signal. Installing a correctly programmed PCM like this one solved the problem instantly. It’s a great reminder that sometimes the issue isn’t the sensor or the component, but the computer that controls it.
Signs You Need a 2003-2006 Tahoe PCM Replacement
A faulty PCM can manifest in numerous ways, from subtle annoyances to critical failures. If you’re noticing any of the following, it’s time to consider a replacement.
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling, stumbling, or hesitating
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A noticeable drop in fuel economy
- ✔ Failure to pass an emissions test
- ✔ Complete no-start or no-spark condition
- ✔ Communication errors with diagnostic scan tools
This module is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM trucks and SUVs from 2003 to 2007 (classic body style), including the Chevrolet Avalanche, Cadillac Escalade, Hummer H2, GMC Sierra, and many more. Please verify the fitment list to ensure compatibility with your exact model and year.
Frequently Asked Questions
What exactly does the PCM do?
The Powertrain Control Module (PCM) is the main computer that controls your vehicle’s engine and transmission. It reads data from dozens of sensors to manage fuel injection, ignition timing, emissions systems, and transmission shift points for optimal performance and efficiency.
Why is providing my VIN so important?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software calibration for your vehicle’s specific engine, transmission, and factory options. This ensures perfect compatibility and prevents performance issues that can arise from using a generic or incorrectly programmed module.
Is this part difficult to install?
Physically replacing the PCM is straightforward, typically involving disconnecting the battery, unplugging a few electrical connectors, and unbolting the module. However, after installation, you will need to perform a security relearn procedure (often called a CASE relearn or Passlock relearn) so the PCM can communicate with your vehicle’s anti-theft system. This procedure can usually be done without special tools and instructions are widely available online.
Will this fix my specific check engine light codes?
If your diagnostic codes point to an internal module failure, a faulty sensor driver, or communication errors (like U-codes), then this PCM is very likely the solution. However, it will not fix issues caused by faulty external sensors, wiring, or mechanical components. Always perform a thorough diagnosis before ordering.
How do I confirm this is the right part number for my truck?
The best way is to check the service number on your original PCM. This part replaces several numbers, including 89017750, 12582605, 12589463, and more as listed in the description. You can also use our vehicle fitment tool or contact us with your VIN for confirmation.