Is Your 1996 GM Vehicle Running Poorly, Stalling, or Not Starting at All?
If you’re dealing with frustrating engine problems in your 1996 Buick Century or another compatible GM model, a failing Powertrain Control Module (PCM) is a very common culprit. Over my 20+ years in the shop, I’ve seen these exact modules cause symptoms that can send you on a wild goose chase, replacing perfectly good parts. A customer’s 1996 Grand Prix came in last week with a harsh 1-2 shift and a random no-start condition. They had already replaced the transmission fluid and filter, but the problem persisted. After confirming good power and ground at the module, we identified the internal PCM failure. This part resolved all their issues immediately.
The Brain of Your Engine, Restored and Ready
This isn’t just a replacement part; it’s a complete solution. We are providing a high-quality PCM, part number 16211539, that is professionally programmed with the latest GM software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. This critical step ensures that the module communicates perfectly with your engine, transmission, and other onboard systems, restoring the original performance and efficiency you expect.
Expert Pro Tip: Check Your Connectors!
Before installing your new PCM, take a close look at the wiring harness connectors. On these mid-90s vehicles, the seals can get brittle, allowing moisture to cause corrosion on the pins. This corrosion can create resistance and mimic the exact symptoms of a bad module. Use a small electronics brush and contact cleaner to gently scrub the pins on the vehicle’s harness. A clean connection is vital for proper function.
Common Symptoms of a Failing 1996 Century PCM
A faulty PCM can manifest in numerous ways. If your vehicle is experiencing any of the following, this module is the likely solution:
- โ Complete no-start or intermittent starting condition
- โ Poor fuel economy
- โ Harsh, erratic, or delayed transmission shifting
- โ Check Engine Light (CEL) is on with communication error codes
- โ Engine stalling, stumbling, or running rough
- โ Failure to pass emissions testing
Plug-and-Play Installation: No Dealer Visit Required
Because we handle the programming, you can install this module yourself and avoid a costly trip to the dealership. The process is straightforward for a DIY mechanic.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these GM models, the PCM is conveniently located inside the air filter housing assembly. You’ll need to open the housing to access it.
- Disconnect Connectors: Carefully unclip the electrical harness connectors from the old module.
- Remove Old Module: Unbolt the old PCM from its mounting bracket within the airbox.
- Install New Module: Secure the new, pre-programmed PCM in place and reconnect the electrical connectors. Ensure they click securely into place.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle is now ready to start. In some cases, a simple security relearn procedure may be needed, which can be done without special tools.
Guaranteed Compatibility
This module, part number 16211539, is a direct replacement for service numbers 88963800 and 16231853. It fits a wide range of 1996 General Motors vehicles, including many Buick, Chevrolet, Oldsmobile, and Pontiac models equipped with the 3.1L, 3.4L, and 3.8L engines. Please verify your vehicle in the fitment list to ensure a perfect match.