Restore Peak Performance to Your 1996 GM Vehicle
Is your 1996 S10, Sonoma, Cavalier, or other GM vehicle suffering from frustrating and hard-to-diagnose issues? An erratic check engine light, sudden stalling, poor fuel mileage, or a complete no-start condition can often be traced back to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and spark timing to transmission shifting. When it fails, the symptoms can be widespread and confusing. This direct-fit replacement PCM, part number 16231851, is the definitive solution to get your vehicle running reliably again.
We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit arrives at your door specifically programmed for your vehicle. Simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN) during checkout, and our technicians will flash the module with the latest, most stable software updates directly from General Motors. This ensures perfect compatibility and optimal performance, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 1996 GMC Sonoma with the 2.2L engine come in that was driving the owner crazy. It would run fine for days, then suddenly start stalling at stoplights and idling rough. There were no consistent trouble codes, just a random misfire code now and then. We checked the fuel pressure, ignition system, and sensors—all tested fine. After hours of chasing ghosts, we hooked up a scope to the injector command signals from the PCM. We saw the signal would just drop out intermittently, starving the engine of fuel. We installed one of these pre-programmed PCMs, and the truck ran perfectly. It’s a classic case of an internal PCM fault that doesn’t always set a clear code, but a new computer is the only correct fix.
Is Your 1996 S10 Sonoma PCM Failing?
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’ve checked the basics and are still stumped, it’s time to consider the PCM. Replacing your old, tired module can resolve a host of persistent problems and restore the smooth, efficient operation you expect from your vehicle. This is especially critical for the 1996 S10 Sonoma PCM, which controls a vital set of engine and transmission parameters.
Common Failure Symptoms
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine cranks but refuses to start
- ✔ Intermittent stalling, especially when warm or at idle
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication error codes stored in the system (U-codes)
- ✔ Failure to pass state emissions inspection
Simple Installation Process
This module is designed for a straightforward installation. Once you receive your VIN-programmed PCM, simply disconnect the vehicle’s battery, locate and remove your old module, and install the new one in its place. Reconnect the harnesses and the battery. For many 1996 GM models, the vehicle will start and run immediately. In some cases, a simple security relearn procedure (often called Passlock or VATS relearn) may be required. This can typically be done without special tools by cycling the ignition key and is a necessary step to sync the new computer with your vehicle’s anti-theft system.
This Module is a Direct Fit For Part Numbers:
- ✔ 16231851
- ✔ 16215830
Vehicle Fitment:
This electronic control module is compatible with the following 1996 models equipped with the specified engines:
- ACHIEVA: 1996 (4-146, 2.4L)
- BERETTA: 1996 (4-134, 2.2L)
- CAVALIER: 1996
- CENTURY: 1996 (4-134, 2.2L)
- CIERA: 1996 (4-134, 2.2L)
- CORSICA: 1996 (4-134, 2.2L)
- GRAND AM: 1996 (4-146, 2.4L)
- S10/S15/SONOMA: 1996 (4-134, 2.2L)
- SKYLARK: 1996 (4-146, 2.4L)
- SUNFIRE: 1996
Frequently Asked Questions
Do I need to have this computer programmed?
No. We handle all the programming for you before shipment. Just provide your vehicle’s VIN when you place your order, and it will arrive ready to install.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. It contains specific information about your vehicle’s engine, transmission, and factory options. We use it to load the exact correct GM software for your specific build.
Where is the PCM located on my 1996 S10 or Sonoma?
On most 1996 S-series trucks, the PCM is located in the engine compartment, typically on the passenger side firewall or inner fender. It’s a silver metal box with large electrical connectors.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the vehicle first to ensure the PCM is the root cause of the problem.
Is this a plug-and-play part?
Yes, because it comes pre-programmed to your VIN, it is designed to be a plug-and-play solution. Some vehicles may require a simple, tool-free security relearn procedure after installation, which involves cycling the ignition key.