Is Your GM Truck or SUV Experiencing Engine Problems?
There’s nothing more frustrating than a vehicle that won’t run right. If your Chevrolet Silverado, GMC Sierra, Tahoe, Suburban, or other compatible GM vehicle is suffering from a persistent check engine light, erratic shifting, stalling, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. The PCM is the brain of your vehicle, controlling everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a cascade of confusing and costly problems. This replacement engine computer, part number 89017750, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We recently had a 2005 Silverado 1500 in the shop with a classic complaint: harsh, unpredictable transmission shifts and a general lack of power. The owner had already spent a significant amount of money replacing transmission solenoids at another shop, with no improvement. When we hooked up our diagnostic tools, we found no specific transmission fault codes, but we did notice communication errors with the engine controller. The original PCM was failing internally, sending corrupt data to the transmission control module. After installing one of our VIN-programmed PCMs and performing a quick security relearn, the truck drove like it just rolled off the factory floor. It’s a powerful reminder that what seems like a major mechanical failure can often be an electronic issue.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light: Often with internal controller error codes like P0601, P0602, or P0606.
- ✔ Engine Performance Issues: You may experience rough idling, stalling, hesitation during acceleration, or a noticeable decrease in power.
- ✔ Poor Fuel Economy: A faulty PCM can’t efficiently manage the engine’s fuel delivery, leading to wasted gas and more trips to the pump.
- ✔ Transmission Shifting Problems: Hard shifts, delayed shifting, or getting stuck in one gear are common symptoms as the PCM directly communicates with the transmission.
- ✔ No-Start or Intermittent Starting: The PCM controls the fuel injectors and ignition coils. If it fails to send the correct signals, your truck may not start at all.
- ✔ Failed Emissions Test: Improper engine management will almost certainly lead to a failed smog or emissions inspection.
Your Reliable 2003-2007 GM Truck PCM Solution
Don’t settle for a generic, unprogrammed module that will require an expensive trip to the dealership. We provide a comprehensive, ready-to-install solution. When you order from us, you’re not just getting a part; you’re getting a fully functional component tailored to your exact vehicle. We use your Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility with your engine, transmission, and all factory options. This process eliminates common software glitches and optimizes performance beyond the original factory settings.
This module is a direct replacement for a wide range of popular GM trucks and SUVs from the 2003-2007 era, serving as a replacement for multiple service numbers including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. By providing your VIN, you guarantee that the GM Truck PCM you receive is the correct one for your application.
Installation is Straightforward
On most of these vehicles, the PCM is located in the engine bay, on the driver’s side, often under or next to the battery tray. Installation requires basic hand tools to disconnect the battery and unbolt the module and its connectors. Once the new module is installed, you will need to perform a security relearn procedure (often called VATS or Passlock relearn). This procedure pairs the new PCM to your vehicle’s anti-theft system and can typically be done in your driveway without special tools. A simple 30-minute key-cycle procedure is usually all that’s required. In some cases, a Crankshaft Position Sensor Variation Relearn (CASE Relearn) may be necessary to clear a specific trouble code, which may require a capable scan tool.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your specific vehicle.
Is the installation difficult?
The physical installation is straightforward for anyone with basic mechanical skills. After installation, you must perform a security relearn procedure, which involves a series of key turns. We can provide instructions for this simple process.
Will this fix my vehicle’s transmission problems?
A faulty PCM is a very common cause of erratic shifting, slipping, and other transmission-related issues in these GM trucks and SUVs. While not a guarantee for every situation, replacing a bad PCM often resolves these problems.
My original part number isn’t 89017750, but it’s on the compatible list. Will this work?
Yes. GM uses multiple service numbers for the same physical part. As long as your original number is listed as compatible (e.g., 12582605, 12589463, 12602802), this module will function as a direct replacement once programmed to your VIN.
What information do you need from me?
We only need your 17-digit Vehicle Identification Number (VIN). This allows us to access the correct software and calibration files for your truck’s specific configuration.