Restore Your Truck’s Performance with a Reliable Powertrain Control Module
Is your GMC Sierra, Silverado, or other GM truck plagued by frustrating issues like a persistent check engine light, poor fuel mileage, erratic shifting, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. Don’t let a faulty module keep your dependable truck off the road. This replacement Sierra 3500 PCM is the definitive, hassle-free solution to get your vehicle running like new again.
We take the guesswork and high costs out of the equation. Unlike sourcing a part from a salvage yard or paying steep dealership prices for programming, this module arrives at your door pre-programmed to your truck’s specific Vehicle Identification Number (VIN). We load the latest, most stable software updates from General Motors, ensuring optimal engine performance, transmission control, and fuel efficiency right out of the box. This is the smart, effective repair that both DIYers and professional technicians trust.
From the Diagnostic Bay: The Case of the Intermittent Stall
I once had a 2006 Silverado 2500 in my shop that was driving its owner crazy. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for an hour. There were no consistent trouble codes, just a history of random communication faults. After checking all the usual suspects—fuel pressure, grounds, ignition system—we focused on the PCM. On these trucks, the PCM’s location under the battery tray exposes it to potential acid leaks and harsh vibrations. We swapped in a VIN-programmed module, and the problem vanished instantly. It’s a reminder that when you see baffling electrical issues, the vehicle’s ‘brain’ is often the culprit.
Is Your GM Truck Showing These Signs?
A failing PCM can cause a wide range of symptoms. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or U0100
- ✔ Engine stalling, stumbling, or rough idling
- ✔ Failure to pass an emissions test
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Reduced fuel economy
- ✔ Complete no-start condition where the engine cranks but won’t fire
A Straightforward Guide to Installation
Installing your new Sierra 3500 PCM is a manageable job for a DIYer with basic tools. While the final step requires a simple security relearn procedure (no special tools needed), the physical swap is easy. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most compatible GM trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, underneath or next to the battery tray.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed PCM into place. Reconnect the electrical harnesses, ensuring they click securely into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Your vehicle’s anti-theft system needs to sync with the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. Instructions for your specific vehicle are readily available online.
Verified Vehicle Compatibility
This module, part number 28042802, is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, and 89017734. It fits a wide range of General Motors trucks and SUVs. Please verify your specific model and options below:
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission function, including fuel mixture, ignition timing, and shift points, to ensure peak performance and efficiency.
Does this part come ready to install?
Yes! We program the module with the latest GM software using the VIN you provide during checkout. It arrives ready for physical installation and a simple security relearn procedure that you can do at home.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we receive your VIN, as the programming is specific to your truck.
What is the security relearn procedure?
It’s a simple process that syncs the new PCM to your vehicle’s anti-theft system. It typically involves a sequence of key turns and waiting periods and does not require any special scan tools. This allows the vehicle to recognize the new module and start.
Is this a better option than going to the dealer?
For many owners, yes. You get a reliable part that is programmed with current software, but you avoid the high labor costs and appointment scheduling associated with dealership service departments. It’s a cost-effective and convenient solution.