1998 Bravada PCM 16266645 | Programmed to Your VIN | Engine Computer

Is Your 1998 Bravada Running Rough, Stalling, or Refusing to Start?

As a mechanic with over two decades of experience under the hood, I’ve seen my fair share of confusing issues on these GM platforms. A customer’s 1998 Bravada came into my shop last month with a classic no-start condition. They had already replaced the fuel pump and ignition coil based on advice from a forum, but the problem persisted. After a quick scan, it was clear: the Powertrain Control Module (PCM) was failing to command the fuel injectors. This is a common failure point I’ve diagnosed hundreds of times on these 4.3L Vortec engines. The internal drivers simply wear out over time, leading to a host of frustrating and expensive misdiagnoses.

This isn’t just a part; it’s a reliable, straightforward solution. You’re getting a thoroughly tested, used OEM Powertrain Control Module that has been professionally programmed with the latest GM software updates specifically for your vehicle. We take the guesswork out of the repair by flashing the unit with your unique Vehicle Identification Number (VIN) before it ever leaves our facility. This means no expensive trips to the dealership for programming—it’s ready to install right out of the box.

Guaranteed Compatibility and Performance Restoration

This module is a direct replacement for a wide range of GM trucks and SUVs from this era. If your original module has part number 16266645 or any of the following, this is the correct part for you:

• ✔ 09355699
• ✔ 16250279
• ✔ 16258815
• ✔ 09366810

By replacing your faulty computer, you can resolve numerous issues, including:

• ✔ Check Engine Light (CEL) illumination for internal module faults
• ✔ Engine stalling or stumbling
• ✔ Harsh or incorrect transmission shifting
• ✔ No-start or intermittent starting problems
• ✔ Poor fuel economy and engine performance
• ✔ Communication errors with scan tools

Easy Installation Guide for Your 1998 Bravada PCM

You don’t need to be a master technician to perform this repair. With basic hand tools, you can have your Bravada back on the road in under an hour. Follow these steps carefully.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
2. Locate the PCM: On your 1998 Bravada, the PCM is typically located in the engine compartment, often on the driver’s or passenger’s side fender well, housed in a black plastic bracket.
3. Disconnect the Harnesses: Carefully unclip and disconnect the large electrical connectors from the module. Be gentle, as the plastic can be brittle after many years.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
5. Install the New Module: Seat your replacement PCM into the bracket and secure it with the mounting bolts.
6. Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect your vehicle’s negative battery terminal.
7. Perform Security Relearn (CRITICAL STEP): These GM vehicles require a security relearn procedure to recognize the new PCM. It’s simple:
   1. Turn the key to the “ON” position (do not start the engine).
   2. Attempt to start the engine. It will crank but not fire up. Leave the key in the “ON” position. The “Security” light on the dash should be illuminated or flashing.
   3. Wait for approximately 10-11 minutes, or until the “Security” light turns off.
   4. Turn the key to the “OFF” position and wait 10 seconds.
   5. Repeat this process two more times for a total of three 10-minute cycles.
   6. After the third cycle, the vehicle will have learned the new PCM and should start and run normally.

Don’t let a faulty computer keep your reliable Bravada off the road. Provide your VIN at checkout, and we’ll handle the programming to deliver a part that’s ready for a simple, effective repair.