Restore Peak Performance to Your GM Truck or SUV
Is your Chevrolet Silverado, GMC Sierra, Cadillac Escalade, or Hummer H2 suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. This replacement module, part number 89017750, is the definitive solution to restore your vehicle’s factory performance, reliability, and drivability.
The PCM is responsible for managing a complex web of systems, including fuel injection, ignition timing, transmission shift points, and emissions controls. When it begins to fail, it can cause a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs of other components. By replacing the faulty brain of your engine, you address the root cause of these issues, ensuring your truck operates exactly as its engineers intended.
From the Diagnostic Bay
We had a 2005 Sierra 2500 come in with a complaint of harsh, unpredictable shifting and a check engine light for a transmission solenoid circuit. The owner had already replaced the solenoid pack twice with no success. After hooking up our scanner, we noticed the voltage readings from the PCM to the transmission were all over the place. Instead of chasing electrical gremlins in the harness, we inspected the PCM. A quick swap with a known-good, programmed unit confirmed our suspicion: the driver circuit inside the original PCM was failing. This pre-programmed module saved the customer from another expensive transmission repair and got his truck shifting like new again.
Why Choose Our Pre-Programmed GM Truck PCM?
This isn’t just a part in a box; it’s a complete, ready-to-install solution. We eliminate the most significant hurdle in replacing a modern vehicle computer: programming. Before we ship your module, our technicians will use your vehicle’s unique Vehicle Identification Number (VIN) to flash the unit with the latest, most stable software updates directly from GM. This ensures perfect compatibility with your specific make, model, and options. You get the benefit of years of factory software improvements for enhanced performance and longevity, all without a trip to the dealership.
Common Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) with various engine or transmission codes.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Unexplained drop in fuel economy.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Inconsistent or non-functioning gauges on the instrument cluster.
Installation is straightforward for a DIY mechanic or any professional technician. Located in the engine bay (typically on the driver’s side, under or near the battery), the process involves disconnecting the battery, unplugging the electrical connectors, removing a few bolts, and swapping the module. Once installed, you may need to perform a simple security relearn procedure (often called a ‘key-on, key-off’ cycle), which can be done without any special tools. This restores communication with your vehicle’s anti-theft system and gets you back on the road quickly.
This module is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please provide your VIN upon checkout to ensure a seamless, plug-and-play experience.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. We handle all the programming for you before the part is shipped. Simply provide us with your vehicle’s VIN during checkout, and it will arrive ready to install.
What information do you need from me?
We only need your 17-digit Vehicle Identification Number (VIN). This allows us to flash the module with the exact software and calibrations for your specific vehicle configuration.
Is this a simple plug-and-play installation?
Yes, for the most part. After physically installing the module, you will likely need to perform a security relearn procedure, which syncs the new PCM with your vehicle’s anti-theft system. This procedure can typically be done in your driveway without any special tools.
How can I be sure my PCM is the problem?
While the symptoms listed are strong indicators of a failing GM Truck PCM, we always recommend a thorough diagnosis by a qualified technician. Common issues include checking for solid power and ground at the PCM connector and ruling out sensor or wiring faults before replacing the module.
Will this PCM fit other GM vehicles not listed in the title?
Yes, this module fits a very wide range of GM trucks and SUVs from 2003-2007, including the Avalanche, Suburban, Tahoe, Yukon, and more. Please refer to the detailed fitment list on this page to confirm compatibility with your specific vehicle.