Restore Peak Performance to Your GM Vehicle
Is your 1998 Oldsmobile Bravada, or another compatible GM truck or SUV, suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM) is often the culprit behind a wide range of problems, from a persistent check engine light to poor fuel economy and even a no-start condition. This replacement PCM, part number 16250279, is the definitive solution to restore your vehicle’s reliability, drivability, and engine efficiency. As the central computer of your vehicle, the PCM governs critical functions like fuel injection, ignition timing, and transmission shifting. When it fails, the entire system is compromised.
From the Diagnostic Bay
I once had a 1999 GMC Yukon in the shop that was driving the owner crazy. It would randomly stall at stoplights, and the transmission would shift hard, but there were no consistent trouble codes pointing to a specific sensor. We checked fuel pressure, scanned for vacuum leaks, and tested the ignition system—everything seemed fine. On a hunch, we monitored the live data stream from the PCM and noticed the injector pulse width and timing signals were erratic just before a stall. We swapped in a correctly programmed PCM, and it was like driving a new truck. It’s a perfect example of how a failing computer can mimic a dozen other mechanical problems, making it a tricky but critical component to diagnose correctly.
Is Your PCM Failing? Common Symptoms
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, misfires, or internal module failure.
- ✔ Engine Stalling or Misfiring: Your engine may run rough, stall unexpectedly, or misfire under load.
- ✔ Poor Fuel Economy: A failing PCM can’t properly manage the engine’s fuel delivery, leading to a noticeable drop in MPG.
- ✔ Harsh or Incorrect Shifting: The PCM controls the transmission, and failure can cause erratic shifting, getting stuck in gear, or delayed engagement.
- ✔ No-Start Condition: The engine cranks but won’t start because the PCM isn’t commanding spark or fuel delivery.
- ✔ Failed Emissions Test: Incorrect engine management will almost certainly lead to a failed smog check.
The Simple, Reliable Solution: A Programmed 1998 Bravada PCM
Don’t let a faulty computer keep your truck off the road. Our process is designed to be simple and effective. This isn’t just a generic, off-the-shelf part. We program each module specifically for your vehicle using the Vehicle Identification Number (VIN) you provide. This critical step ensures that the PCM has the correct factory software, calibrations for your engine and transmission, and all the latest updates from GM. This eliminates compatibility guesswork and ensures a smooth installation process. This module is a direct replacement for part numbers 16250279, 09366810, and 09355699, guaranteeing a perfect fit for a wide range of GM vehicles from that era.
Once you receive your VIN-programmed module, installation is straightforward. In most cases, you will need to perform a security relearn procedure (often called a CASE relearn or anti-theft relearn) to sync the new PCM with your vehicle’s keys and security system. This is a standard procedure that can often be done without special tools, and instructions are widely available.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. After installation, you will most likely need to perform a security relearn procedure, which pairs the new module to your vehicle’s anti-theft system. This procedure varies slightly by model but typically involves a sequence of key turns. A Crankshaft Variation Relearn (CASE relearn) may also be necessary and can be performed by most professional scan tools.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential for the module to function in your vehicle.
Is this part compatible with my 1999 GMC Sierra?
This module fits a wide variety of 1998-1999 GM trucks, vans, and SUVs. Please check the detailed fitment list on this page to confirm that your specific year, make, model, and engine are listed for part number 16250279. Matching the part number is the most reliable way to ensure compatibility.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, then this replacement part will solve the issue. However, it’s crucial to ensure that the underlying problem is not a failed sensor or wiring issue. A proper diagnosis is always recommended before replacing a control module.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to a computer that only controls engine functions. A PCM (Powertrain Control Module) is a more integrated unit that controls both the engine and the transmission. For this generation of GM vehicles, it is correctly referred to as a PCM.