Restore Peak Performance to Your C5 Corvette
The Powertrain Control Module (PCM) is the electronic brain of your 2004 Corvette, orchestrating everything from fuel injection and ignition timing to transmission shifts and emissions controls. When it begins to fail, you’ll notice a significant decline in performance, reliability, and drivability. This replacement Powertrain Control Module, part number 88864822, is the definitive solution to restore your vehicle’s factory-specified operation and bring back the exhilarating driving experience you expect from a Corvette.
Unlike a generic, off-the-shelf part, this module is professionally programmed specifically for your vehicle. Upon purchase, you simply provide us with your Vehicle Identification Number (VIN), and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures seamless integration with your Corvette’s existing systems, eliminating the need for an expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to get you back on the road quickly and confidently.
From the Diagnostic Bay
We had a 2004 Corvette come into the shop with a really frustrating, intermittent problem. The owner complained of random stalling at idle and occasional hard shifting, but there were no consistent trouble codes. We checked fuel pressure, scanned for vacuum leaks, and tested sensors for days. Everything seemed fine. On a hunch, we monitored the live data stream from the PCM and noticed the injector pulse width would occasionally drop to zero for a split second, causing the stall. It was a classic case of a failing processor inside the PCM. We installed one of our VIN-programmed modules, performed the security relearn, and the car ran flawlessly. It’s a reminder that when all the mechanical parts check out, the computer is often the culprit.
Is Your 2004 Corvette PCM Failing?
A faulty PCM can manifest in a variety of ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a failing engine computer could be the root cause:
- ✔ Check Engine Light (CEL) is illuminated with various communication or sensor codes.
- ✔ Engine misfires, runs rough, or stalls unexpectedly.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
- ✔ Intermittent issues that are difficult to diagnose and seem to have no pattern.
The Right Solution for Your Vehicle
This module is a direct-fit replacement for your original unit, matching OEM specifications for performance and durability. It is a reliable and cost-effective alternative to sourcing a new part from a dealership. By replacing your faulty 2004 Corvette PCM, you are not just fixing a problem; you are investing in the long-term health and reliability of your vehicle’s complex engine management system. The VIN-specific programming ensures all factory settings, including those for your specific options package, are correctly loaded for optimal performance.
This part is a direct replacement for the following service numbers: 12581565, 8125815650, 12570557, 12570558, 12576106, 12576869, 12578127, 8125781270, 88864822, and 89017733.
While this listing is focused on the 2004 Corvette PCM, this versatile module also fits a wide range of other GM trucks, vans, and SUVs from the same era, including the GMC Yukon, Chevrolet Express, GMC Safari, Cadillac CTS, and various Silverado and Sierra models. Please verify the part number and consult the fitment list to ensure compatibility with your specific vehicle.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Because this module comes pre-programmed to your VIN, the main programming is done. However, on many GM vehicles, you will need to perform a security relearn procedure (often called Passlock or Passkey) and a Crankshaft Variation Relearn (CASE relearn). These procedures can often be done without special tools and instructions can be found online or in a service manual.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot program and ship the module until we receive this information. Please double-check the VIN for accuracy.
Is this a brand new part?
This is a high-quality, OEM replacement part that has been thoroughly inspected, tested, and prepared to meet or exceed original factory standards. It is loaded with the latest GM-certified software for your vehicle.
What happens if I install it and my problem isn’t fixed?
While this PCM will solve issues directly caused by a faulty computer, it’s important to ensure your vehicle has been properly diagnosed. This part will not fix problems related to bad sensors, wiring, or mechanical failures. We recommend a thorough diagnosis by a qualified technician before ordering.
Will this change my vehicle’s performance?
This module is programmed with the standard GM calibration for your specific VIN. Its purpose is to restore the vehicle’s original performance, fuel efficiency, and emissions levels, not to alter them.