Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from baffling engine issues? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit behind problems like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition. This replacement PCM, part number 89017750, is the definitive solution to restore your vehicle’s reliability and performance. We take the guesswork and high dealership costs out of the equation by pre-programming this module specifically for your vehicle using your VIN. It arrives ready for installation, loaded with the latest GM software updates to ensure optimal engine and transmission operation.
From the Diagnostic Bay
We had a 2005 Sierra 2500 with the 6.0L come in that was driving the owner crazy. It had a random, intermittent stalling issue and a check engine light for a throttle position sensor circuit that wouldn’t clear, even after replacing the sensor twice. After hours of chasing wires, we finally hooked up a scope to the PCM outputs. We discovered the 5-volt reference signal from the module was dropping out randomly. The internal circuitry of the original PCM was failing. We installed one of our VIN-programmed modules, performed the security relearn, and the truck ran perfectly. The customer saved hundreds, if not thousands, in avoided diagnostic fees and unnecessary parts.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, stumbling, or rough idling
- ✔ Failure to start or intermittent starting problems
- ✔ Poor engine performance and reduced power
- ✔ Decreased fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
- ✔ Vehicle entering ‘limp mode’ or reduced power mode
Why Choose Our Pre-Programmed GM PCM 89017750?
Replacing a PCM isn’t just about swapping hardware. The module must be correctly calibrated to your vehicle’s specific VIN, which includes its engine, transmission, tire size, and emissions equipment. Our professional service handles this critical step for you. When you order, simply provide us with your vehicle’s VIN. We will flash the module with the most current, stable software directly from GM. This ensures all systems communicate correctly, eliminating the need for an expensive trip to the dealership for programming. This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, ensuring broad compatibility across a wide range of GM trucks and SUVs from 2003 to 2007.
Installation and Setup
On most compatible trucks and SUVs like the Sierra, Silverado, and Suburban, the PCM is located in the engine bay, on the driver’s side, under or next to the battery tray. While the physical installation is straightforward, please be aware that after installation, you will likely need to perform a security relearn procedure (also known as a CASE relearn or Passlock relearn). This procedure syncs the new PCM with your vehicle’s anti-theft system and can often be completed without special tools. Instructions for this procedure are widely available online for your specific model.
Frequently Asked Questions
Do I need to program this module?
No. This PCM comes fully programmed to your vehicle’s specific VIN before we ship it. Please provide your VIN during or after checkout to ensure correct programming.
What is a security relearn procedure?
It’s a process that allows your vehicle’s anti-theft system to recognize the new PCM. Without it, the vehicle may not start. The procedure typically involves a sequence of key turns and waiting periods and does not require a special scan tool.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Is this part compatible with my vehicle?
This module fits a wide range of 2003-2007 GM trucks and SUVs. Please review the detailed fitment list on this page and verify that your old module has one of the compatible service numbers (e.g., 89017750, 12602802) printed on its label.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, this replacement will resolve the issue. However, it’s crucial to ensure that the underlying cause is not a failed sensor or wiring problem.