Is Your GM Truck, Van, or SUV Experiencing Frustrating Issues?
If you’re dealing with a check engine light that won’t go away, erratic engine performance, harsh shifting, or even a no-start condition, the root cause is often a failing Powertrain Control Module (PCM). The PCM is the brain of your vehicle, controlling everything from fuel mixture and ignition timing to transmission shift points. When it begins to fail, it can cause a cascade of confusing and difficult-to-diagnose problems. Don’t let a faulty computer keep your reliable GM vehicle off the road. This genuine GM Powertrain Control Module, service number 12570558, is the definitive solution to restore your vehicle’s original performance and reliability.
From the Diagnostic Bay
We had a 2003 Express 3500 work van come into the shop that had its owner completely stumped. The transmission was shifting erratically—slamming into gear one moment and hesitating the next. The owner had already spent a small fortune replacing transmission solenoids and sensors, with no improvement. After hooking up our professional scanner, we noticed that the PCM was losing communication intermittently and sending faulty signals to the transmission. Instead of a costly transmission rebuild, the real fix was a new brain. We installed a pre-programmed GM PCM 12570558, performed the security relearn, and the van drove out shifting as smoothly as it did the day it left the factory. It’s a classic case of symptoms in one area being caused by the central computer.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Poor fuel economy for no apparent reason.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
The Definitive Solution: A Programmed GM PCM 12570558
Replacing a modern vehicle’s computer isn’t a simple plug-and-play affair. This module is the core of your vehicle’s operating system and requires precise programming to function. That’s where we come in. When you order this GM PCM 12570558 from us, you’re not just getting a part; you’re getting a complete, ready-to-install solution. We use your vehicle’s unique Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from General Motors. This ensures that your vehicle benefits from all the performance, efficiency, and drivability improvements GM has released since your vehicle was new. This critical programming step eliminates the need for an expensive trip to the dealership for flashing.
Key Benefits of this Module:
- VIN-Specific Programming: Flashed with the latest GM software for your exact vehicle, ensuring perfect compatibility and optimal performance.
- Direct-Fit Replacement: Designed to OEM specifications for a hassle-free installation. It mounts in the factory location with the original hardware and connectors.
- Broad Compatibility: This module, identified by service number 12570558, is compatible with a wide range of popular GM models from 2003-2004, including the Express/Savana vans, Sierra/Silverado pickups, Suburban/Yukon XL SUVs, and even the Corvette and CTS. It directly interchanges with numerous other service numbers like 12581565, 12576106, and 89017733.
- Restores Factory Operation: Solves complex electronic issues and brings your engine and transmission controls back to factory specifications.
Installation is Straightforward
Physically swapping the module is typically a simple process. It’s often located in the engine bay, either on the fender well or near the battery. After disconnecting the battery, you simply unplug the electrical connectors, unbolt the old module, and install the new one. Once installed, you will need to perform a simple security relearn procedure (often called a CASE relearn or anti-theft relearn). This procedure can usually be done without special tools and involves a sequence of key turns. This syncs the new PCM with your vehicle’s anti-theft system, allowing it to start. Instructions for this procedure are widely available online for your specific model.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. We flash it with the latest GM-certified software using the VIN you provide, so it arrives ready for installation.
Where do I provide my vehicle’s VIN?
After you complete your purchase, we will contact you for your 17-digit VIN. You can also add it to the notes section during checkout. Please double-check it for accuracy, as the programming is specific to this number.
What is a security relearn procedure?
It’s a simple procedure that syncs the new PCM to your vehicle’s existing anti-theft system and keys. For most GM vehicles of this era, it involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this sequence three times. This allows the components to recognize each other. Your vehicle will not start until this is completed.
How do I confirm this is the right part for my vehicle?
The best way is to match the service number on your current module to one of the numbers listed, such as 12570558, 12581565, or 89017733. You can also check the comprehensive fitment list on this page or contact us with your VIN, and we can verify compatibility for you.
Is this a brand new part?
This is a high-quality, fully tested genuine OEM part that has been professionally prepared and programmed for your vehicle. It meets or exceeds all original factory specifications for performance and longevity.