Is Your GM Truck or SUV Experiencing Engine Problems?
If your 1998 Oldsmobile Bravada, Chevrolet truck, or GMC van is suffering from erratic behavior like stalling, poor fuel economy, or a persistent check engine light, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your vehicle’s engine and transmission, a faulty PCM can cause a wide range of frustrating and difficult-to-diagnose issues. Don’t let a bad module keep you off the road. This is your direct-fit, reliable solution.
The Brain of Your Engine: A Programmed Replacement
This listing is for a genuine, used OEM Powertrain Control Module, part number 16266645, which has been fully tested for functionality. What sets our service apart is the critical programming we perform before shipping. We will flash the module with the latest official GM software updates specifically for your vehicle using the VIN you provide. This ensures that the computer communicates perfectly with your engine, transmission, and all related sensors, restoring original factory performance and drivability. A properly functioning 1998 Bravada PCM is essential for optimal engine health.
From the Diagnostic Bay
We had a ’99 Chevy Tahoe come into the shop that had its owner completely stumped. The truck would randomly stall at stoplights, the transmission shifted harshly, and the check engine light would come on and off with a dozen different codes. The owner had replaced multiple sensors with no luck. After hooking up our scanner and seeing erratic data from the PCM, we suspected an internal failure. We swapped in a VIN-programmed module just like this one, and it was like a new truck. All the ghost codes vanished, the shifting smoothed out, and the stalling stopped completely. It’s a perfect example of how a failing computer can mimic many other problems.
Common Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) with various codes.
- ✔ Engine stalling or shutting off unexpectedly.
- ✔ Rough idling or misfires.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
Guaranteed Compatibility and Simple Installation
This module is a direct replacement for several part numbers, including 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. It fits a wide range of GM trucks and vans from the late 90s, as detailed in the fitment list. Installation is straightforward for a DIY mechanic or any professional technician. Simply disconnect the battery, unplug the electrical connectors from your old module, unbolt it, and install the new one in its place. Once the battery is reconnected, your vehicle will be ready to go. For some vehicles, a security relearn procedure may be required, which can typically be done without special tools.
By purchasing this pre-programmed 1998 Bravada PCM, you are getting a cost-effective and reliable fix that eliminates the need for expensive dealership programming. Just provide your VIN at checkout, and we’ll handle the rest, shipping you a part that’s ready to install and solve your vehicle’s electronic issues.
Frequently Asked Questions
How does the VIN programming process work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this number to load the exact, correct GM factory software and calibrations for your specific engine, transmission, and options. This ensures the module works seamlessly with your vehicle right out of the box.
Is this part difficult to install?
For most models, the PCM is located in the engine bay and is easily accessible. Installation typically involves disconnecting the battery, unplugging a few electrical connectors, and removing a few bolts. It’s a job most DIY mechanics can handle in under an hour.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s important to properly diagnose your vehicle, as the check engine light can be triggered by many other failing components like sensors or wiring.
Is this a new part?
No, this is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. This provides an affordable and reliable alternative to a costly new module from a dealership.
Do I need to do anything after installation?
In many cases, the module is plug-and-play. However, some GM vehicles may require a security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure can typically be performed without any special tools.