Is Your Cadillac or Aurora Running Rough, Stalling, or Refusing to Start?
If you’re driving a late-90s Cadillac or Oldsmobile Aurora, you know the power and refinement of the Northstar V8 and associated powertrains. But when the brain of the operation—the Powertrain Control Module (PCM)—starts to fail, it can turn your luxury ride into a source of constant frustration. In my 20+ years as a diagnostic technician, I’ve seen these exact modules cause some of the most baffling issues, often misdiagnosed as bad sensors or fuel pumps, costing owners hundreds in unnecessary repairs.
Common Symptoms of a Failing GM PCM (Part 19109039 / 16214848)
A failing PCM doesn’t always die suddenly. It often gives warning signs that can be intermittent at first. If your vehicle is experiencing any of the following, the PCM is a highly likely culprit:
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Stalling for no apparent reason, either at idle or while driving.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A check engine light that’s on with multiple, seemingly unrelated trouble codes.
- ✔ Poor fuel economy and a noticeable loss of engine power.
- ✔ The cooling fans running constantly, even when the engine is cold.
- ✔ No communication with a diagnostic scan tool, making it impossible to pull codes.
From the Shop Floor: A Real-World Diagnostic Case
“A customer’s 1998 Seville came in last week with these exact symptoms. It would stall randomly and sometimes wouldn’t restart for an hour. The owner had already replaced the crank sensors and the fuel pump with no success. When I connected my scan tool, I couldn’t establish communication with the PCM. After verifying the module had proper power and ground at the connectors—a critical first step—I knew the internal logic board of the PCM had failed. The constant heat cycles in the engine bay, where this module is located on the Seville, had caused microscopic fractures in the solder joints over two decades. Replacing the PCM with a correctly programmed unit solved every single issue instantly.”
The Solution: A Reliable, Pre-Programmed PCM
This isn’t just a replacement part; it’s a complete solution. This Powertrain Control Module, service number 19109039 (interchangeable with 16214848), is the definitive fix for the issues listed above. The most significant benefit we offer is our professional programming service, which is included with your purchase.
Here’s why that’s so important:
- ✔ VIN-Specific Programming: We flash the module with the latest GM-certified software calibration that is specific to your car’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility with your engine, transmission, and all factory options.
- ✔ Security System Matching: The programming correctly syncs the PCM with your vehicle’s anti-theft system (VATS/PassKey). An incorrectly programmed module won’t allow the car to start. Our service eliminates this problem.
- ✔ Saves You Time and Money: You get a module that is ready for installation right out of the box. There’s no need to have your car towed to a dealership for expensive programming, which can often cost hundreds of dollars on its own.
Guaranteed Fitment for Your Vehicle
This module is a direct-fit replacement for the original electronic control module on the following vehicles. Please verify your model and the module’s location before ordering.
- ✔ Cadillac DeVille: 1997, 1998, 1999 (Located in LH engine compartment)
- ✔ Cadillac DeVille: 1996 (4.6L, 8-279 engine only; LH engine compartment)
- ✔ Cadillac Eldorado: 1996, 1997, 1998, 1999 (Located in LH engine compartment)
- ✔ Cadillac Seville: 1996, 1997, 1998, 1999 (Located in LH engine compartment)
- ✔ Oldsmobile Aurora: 1996, 1997, 1998, 1999 (Located in RH dash)
Simple Ordering Process
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. Our technicians will handle the rest, programming the module specifically for your car before shipping it directly to you. This is the most straightforward and reliable way to get your classic Cadillac or Aurora back on the road and running like it should.