Get Your Truck Back on the Road, Running Strong
Is your GMC Sierra suffering from frustrating issues like a persistent check engine light, erratic shifting, or a no-start condition? A failing Powertrain Control Module (PCM) is often the culprit, leaving you with an unreliable vehicle. This isn’t just an inconvenience; it’s a major disruption to your work and daily life. Our professionally programmed GMC Sierra 1500 PCM 89017749 is the definitive solution to restore your truck’s performance and your peace of mind.
Common Symptoms & Your Solution
If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs replacement:
- Unexplained Check Engine Light (CEL) activation
- Diagnostic Trouble Codes (DTCs) related to PCM communication or processor failure
- Harsh or unpredictable automatic transmission shifting
- Poor fuel economy and reduced engine power
- Engine stalling, sputtering, or refusing to start
- Communication issues with diagnostic scan tools
This module is the direct-fit, reliable fix. We take the guesswork out of the repair by flashing the unit with the latest GM-certified software, specifically matched to your truck’s Vehicle Identification Number (VIN). This ensures seamless integration and optimal performance right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Sierra: Arrives ready for installation, flashed with the newest GM updates for your specific vehicle. No expensive trip to the dealership for programming is required.
- ✔ Restores Peak Engine Performance: Corrects common drivability problems, leading to smoother idling, responsive acceleration, and proper transmission function.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for OEM part numbers 89017749, 12589462, and 12602801, guaranteeing a hassle-free installation.
- ✔ Cost-Effective Solution: Get the quality and function of a dealer part without the excessive cost and scheduling delays.
- ✔ Built for Durability: This unit is inspected to meet or exceed original factory specifications for long-lasting reliability in your hardworking truck.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of Correct Programming
As a technician with over two decades of experience, I’ve seen countless repairs go wrong due to improper PCM programming. Simply installing a used module without matching it to the vehicle’s VIN is a recipe for disaster—it can lead to no-start conditions, incorrect transmission behavior, and a host of system communication errors. Our process eliminates that risk entirely. By programming this GMC Sierra 1500 PCM 89017749 to your VIN *before* it ships, we ensure all the vehicle’s systems communicate correctly, just as the factory intended. This isn’t just a part; it’s a complete, ready-to-install solution.
Frequently Asked Questions
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship your part until we have this information, as the programming is specific to your exact vehicle.
Will any additional programming be required after installation?
In most cases, this module is a direct installation. However, some GM vehicles may require a security relearn procedure (often called Passlock or VATS) and a Crankshaft Variation Relearn (CASE). These are simple procedures that can often be done without a scan tool, and instructions are widely available online.
Is this the correct part for my truck?
This GMC Sierra 1500 PCM 89017749 is compatible with a wide range of GM vehicles. The best way to ensure perfect fitment is to match the part number from your original module. Please review the detailed fitment list on this page or contact us with your VIN if you are unsure.
What is a PCM?
The Powertrain Control Module, or PCM, is the central computer of your vehicle. It controls all aspects of the engine and transmission, including fuel delivery, ignition timing, emissions systems, and shift points, to ensure optimal performance and efficiency.
What if my original part number is 12589462 or 12602801?
This module is a fully compatible replacement for those part numbers as well. When programmed to your VIN, it will function identically to the original unit that came in your vehicle.