Restore Your Vehicle’s Brainpower and Performance
Is your Chevrolet Express, GMC Savana, Tahoe, or Suburban running rough, stalling, or refusing to start? Are you battling a persistent Check Engine Light with confusing diagnostic codes? The Powertrain Control Module (PCM), often called the Electronic Control Module (ECM), is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This genuine, used PCM, service number 9355699, is the reliable and effective solution to get your truck or van operating as it should.
From the Diagnostic Bay
A customer brought in their ’99 Tahoe with a classic no-start condition. It would crank all day but never fire up. We checked for spark and fuel pressure, and both were intermittent. The scanner was having trouble communicating with the PCM. After verifying all the power and ground circuits to the module were solid, we knew the internal circuitry of the PCM itself had failed. Instead of a costly trip to the dealer and days of downtime, we sourced a pre-programmed module like this one. After a simple installation and a quick security relearn procedure, the Tahoe fired right up and ran perfectly, saving the customer significant time and money.
The Simple, VIN-Programmed Solution
Finding a replacement PCM for an older vehicle can be a challenge, and finding one that works correctly is even harder. This isn’t just a part off a shelf; it’s a complete service. We take this tested, used module and flash it with the latest official GM software calibration specifically for your vehicle. All you need to do is provide us with your Vehicle Identification Number (VIN) during checkout. This ensures that the module has the correct software for your engine, transmission, and emissions equipment, making installation as straightforward as possible.
Why Choose Our Programmed 1998-1999 Express 2500 PCM?
This module is the definitive fix for a wide range of issues plaguing many late-90s GM vehicles. By matching the software to your VIN, we eliminate the guesswork and the need for expensive programming tools or a trip to the dealership. This module is meticulously sourced from a salvaged vehicle and tested for functionality, providing a dependable alternative to sourcing an unknown part from a junkyard. It’s a cost-effective way to restore the critical logic and control your vehicle needs to run efficiently and reliably.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) illumination
- ✔ Engine stalling, misfiring, or running rough
- ✔ Complete no-start or intermittent starting issues
- ✔ Poor fuel economy
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Failure to communicate with diagnostic scan tools
- ✔ Unexplained electrical or sensor-related error codes
Replacing your faulty computer with this pre-programmed unit is the most direct path to resolving these issues and restoring your vehicle’s factory performance and dependability. Don’t let a bad PCM keep you off the road. Order today and provide your VIN to receive a module that’s ready for your specific truck or van.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact GM factory software and calibration file for your specific vehicle. This includes information about the engine size, transmission type, axle ratio, and emissions equipment. Providing the VIN ensures the replacement PCM works correctly right out of the box.
Is any additional programming required after installation?
In most cases, you will need to perform a security relearn procedure (often called a CASE relearn or Passlock relearn). This syncs the replacement PCM with your vehicle’s anti-theft system. This procedure is simple and can typically be done without special tools. Instructions are widely available online for your specific model.
How do I know if my PCM is actually the problem?
Diagnosing a faulty PCM requires ruling out other potential causes first, such as bad sensors, wiring issues, or fuel and ignition system problems. Common indicators of a bad PCM include multiple unrelated error codes, a no-start condition when spark and fuel are present, or a complete loss of communication with a scan tool. It’s always best to have a qualified technician diagnose the issue if you are unsure.
Is this a new part?
No, this is a high-quality, tested used part sourced from a salvaged vehicle. Each unit is inspected and verified to be functional before it is programmed and shipped, offering a reliable and affordable solution.
Which part numbers does this module replace?
This PCM is a direct replacement for several service numbers, including 09355699, 16266645, 16250279, 16258815, and 09366810. Please verify your original part number matches one of these for guaranteed compatibility.