Restore Your Engine’s Brain and Get Back on the Road
Are you chasing down frustrating issues with your 1998 Oldsmobile Bravada or another compatible GM truck? Intermittent stalling, a persistent check engine light, or erratic transmission shifts can point to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen how a faulty PCM can mimic a dozen other problems, leading to wasted time and money on unnecessary parts. This isn’t just a component; it’s the central computer for your engine, and when it fails, your vehicle’s reliability is gone.
This is a reliable, tested, and VIN-programmed PCM that serves as a direct-fit solution. Sourced from a salvaged vehicle, this genuine GM module offers OEM performance without the dealership price tag. The most significant benefit we offer is our professional programming service. Simply provide your vehicle’s VIN at checkout, and we will flash the module with the latest factory software specific to your Bravada. This means it arrives at your door ready to install, saving you a costly trip to the dealer and complex programming procedures. It’s the most straightforward way to solve complex electronic issues and restore your vehicle’s performance and dependability.
A Technician’s Notebook
I remember a 1998 GMC Jimmy that came into the shop with a ghost of a problem. The owner had replaced the fuel pump, ignition coil, and crank sensor, but it would still randomly refuse to start, especially when hot. No consistent codes, just pure frustration. After checking all the wiring, we hooked up a scope to the injector drivers and saw the signals were dropping out intermittently. The culprit? The PCM. We installed a VIN-programmed module just like this one, and the Jimmy fired up every single time afterward. This simple swap saved the owner from selling a truck he loved.
Is Your Vehicle Showing These Symptoms?
A failing PCM can cause a wide range of issues. If you’re experiencing any of the following, your engine computer could be the root cause:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Stored diagnostic trouble codes (DTCs) like P0601, P0602, or P0605, indicating internal module failure
- ✔ Engine stalling, stumbling, or hesitating for no apparent reason
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A complete no-start condition where the engine cranks but won’t fire
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to communicate with a diagnostic scan tool
A Straightforward Guide to Your 1998 Bravada PCM Installation
Replacing the PCM on these GM vehicles is a job most DIYers can handle with basic tools. Our pre-programming makes it even easier. Follow these general steps to get your truck running right:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for any residual power to discharge.
- Locate the Module: On the 1998 Bravada, the PCM is typically located in the engine compartment. On other models, it may be on the driver’s side fender, near the battery, or on the passenger side. Refer to the fitment list for common locations.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs that may need to be gently pried up or squeezed to release. Inspect them for any corrosion or damage.
- Remove the Old PCM: Unbolt the module from its mounting bracket. It’s usually held in by a few bolts or nuts.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
- Security Relearn Procedure: In many cases, you will need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the vehicle’s anti-theft system to recognize the new PCM. Your vehicle will not start until this is completed.
Verified Vehicle Compatibility
This module, identified by service ID 09355699, is a direct replacement for multiple part numbers including 16258815, 16266645, 16250279, and 09366810. Please match your part number or confirm fitment with the list below:
- Oldsmobile Bravada: 1998 (4.3L)
- Chevrolet/GMC S10, S15, Sonoma, Blazer, Jimmy: 1998 (4.3L)
- GMC Envoy / Isuzu Hombre: 1998 (4.3L)
- Chevrolet Astro / GMC Safari: 1998
- Chevrolet & GMC C/K 1500, 2500, 3500 Pickups: 1998-1999 (Gasoline Engines)
- Chevrolet Suburban & Tahoe / GMC Yukon: 1998-1999 (Gasoline Engines)
- Cadillac Escalade: 1999
- Chevrolet Express / GMC Savana 1500, 2500, 3500 Vans: 1998-1999 (Gasoline Engines)
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software calibration your vehicle requires from GM. This ensures perfect compatibility with your engine, transmission, and factory options, making the installation process plug-and-play.
Is this a new part?
No, this is a high-quality, used OEM part that has been sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
Will I need to do anything after installing it?
After physical installation, you will need to perform a security relearn procedure, also known as a VATS relearn. This is a simple process that syncs the new PCM to your vehicle’s anti-theft system and does not require any special tools. Instructions are widely available online for your specific model.
What if my part number is slightly different?
This module replaces several part numbers, including 09355699, 16266645, 16250279, and 09366810. As long as your vehicle is on the compatibility list and you provide your VIN, we will ensure it is programmed correctly for your application.
How can I be sure the PCM is my problem?
While the symptoms listed are common for PCM failure, it’s always best to have a proper diagnosis performed. Common trouble codes pointing to the PCM are P0601-P0606. If you’re unsure, consulting a professional mechanic can help confirm the diagnosis before you purchase.