Programmed 1996 LeSabre PCM 16211539 | VIN Matched Engine Computer

If you’re dealing with a 1996 GM vehicle that’s giving you headaches—stalling, running rough, or flashing a stubborn Check Engine Light—the Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its proper function is non-negotiable for performance and reliability. This isn’t just a replacement part; it’s a direct solution, programmed specifically for your car’s Vehicle Identification Number (VIN) to restore its original performance and efficiency.

For over two decades in my own shop, I’ve seen countless drivers chase expensive sensor and component replacements, only to find the root cause was a failing PCM. This module, part number 16211539, is the definitive fix for a wide range of issues plaguing these classic mid-90s GM cars. We take the guesswork and hassle out of the repair by flashing the module with the latest GM software updates for your specific vehicle before it ever leaves our hands. This means no expensive trips to the dealership for programming—it arrives at your door ready to install.

Is Your GM Vehicle Showing These Symptoms?

A failing PCM can manifest in ways that mimic other component failures. Before you start replacing sensors, check if your car is experiencing any of these classic signs of a bad engine computer. In my experience, if you have two or more of these, the PCM is a primary suspect.

• ✔ Check Engine Light is on with communication error codes like P0601 or P0605.
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained stalling or rough idling, especially after warming up.
• ✔ A noticeable drop in fuel economy.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ The cooling fans don’t turn on, causing overheating.
• ✔ Failure to pass an emissions test.

A Straightforward Guide to Installation

Replacing the PCM on these vehicles is a job most DIYers with basic tools can handle in under an hour. Our pre-programming makes it a true plug-and-play repair.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
2. Locate the PCM: On most of these vehicles, the PCM is located in the engine bay, often inside the air filter box or mounted to the firewall.
3. Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs; be gentle to avoid breaking them. Inspect the terminals for any corrosion or damage.
4. Remove the Old Module: Unbolt the old PCM from its mounting bracket.
5. Install the New Module: Mount your new, pre-programmed PCM into the bracket and securely fasten it.
6. Reconnect and Secure: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect your vehicle’s negative battery terminal.
7. Final Check: Turn the key to the ‘ON’ position (without starting) for 10-15 seconds, then turn it off. Repeat this once more, then start the vehicle. It may run a little rough for the first few minutes as it completes its internal checks.

Verified Vehicle Compatibility

This module is a direct-fit replacement for the original part numbers 16211539, 88963800, and 16231853. It is confirmed to fit the following 1996 models:

• Achieva (3.1L)
• Beretta (3.1L)
• Bonneville (3.8L)
• Century (3.1L)
• Ciera (3.1L)
• Corsica (3.1L)
• Cutlass (3.1L, 3.4L)
• Eighty Eight (3.8L)
• Grand Am (3.1L)
• Grand Prix
• LeSabre (3.8L)
• Lumina Car (3.1L, 3.4L)
• Lumina Van (3.4L)
• Monte Carlo
• Ninety Eight (3.8L)
• Park Avenue (3.8L)
• Regal
• Riviera (3.8L)
• Silhouette (3.4L)
• Skylark (3.1L)
• Trans Sport (3.4L)