Get Your GM Truck or SUV Back on the Road
Is your 1998 Oldsmobile Bravada or another GM vehicle from that era suffering from mysterious electrical gremlins? Issues like a persistent check engine light, erratic engine performance, stalling, or transmission shifting problems can often be traced back to a failing Powertrain Control Module (PCM). As the central computer, the PCM is responsible for managing everything from fuel delivery and ignition timing to transmission shifting. When it fails, the symptoms can be frustrating and difficult to diagnose.
This is a reliable, tested, and ready-to-install solution. We are offering a genuine used GM PCM, part number 09366810, that has been professionally programmed with the latest GM software updates specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after your purchase, and we’ll handle the programming. This means you can avoid a costly trip to the dealership and the hassle of finding a shop with the right tools to program a new module. This is a direct-fit replacement that restores original functionality and performance.
Case Study: A Tricky Diagnosis
I once had a 1999 Chevy Tahoe in my bay that had its owner chasing his tail for weeks. The symptoms were classic fuel delivery problems—stalling, hard starts, and poor power. He had already replaced the fuel pump and filter with no success. After connecting my scan tool, I noticed the fuel pump relay wasn’t getting the command to energize from the PCM, even though all wiring was intact. The culprit wasn’t the fuel system at all; it was a failing driver inside the original PCM. A replacement, programmed 1998 Bravada PCM (which cross-references) solved the problem instantly. It’s a perfect example of how the PCM can cause symptoms that seem unrelated.
Is Your Vehicle Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, this module could be the solution you need:
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, P0605, or other internal controller errors.
- ✔ Engine stalling or shutting off randomly while driving.
- ✔ No-start or hard-starting conditions where the engine cranks but won’t fire.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions or smog test.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Installing your programmed PCM is a job most DIYers can handle in under an hour with basic hand tools. Follow these steps to get your vehicle running smoothly again.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most of these GM trucks and SUVs, the PCM is located in the engine compartment, often on the driver’s or passenger’s side inner fender or near the battery.
- Disconnect the Connectors: Carefully unclip and remove the electrical wiring harnesses from the old PCM. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Security Relearn (If Necessary): Some GM vehicles of this era use a PASSLOCK or VATS security system that may require a simple relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service information for specific steps if it doesn’t start immediately.
Verified Vehicle Compatibility
This module, identified by part number 09366810 or interchange ID 9355699, fits a wide range of GM vehicles. Please match your original part number to ensure compatibility. This part is a confirmed fit for the following models, among others:
- ✔ Oldsmobile Bravada: 1998 (4.3L)
- ✔ Cadillac Escalade: 1999
- ✔ Chevrolet/GMC Trucks (1500, 2500, 3500): 1998-1999
- ✔ Chevrolet/GMC Suburban: 1998-1999
- ✔ Chevrolet Tahoe / GMC Yukon: 1998-1999
- ✔ Chevrolet Astro / GMC Safari: 1998
- ✔ Chevrolet Express / GMC Savana Vans (1500, 2500, 3500): 1998-1999
- ✔ Chevrolet S10 / GMC Sonoma: 1998 (4.3L)
- ✔ Chevrolet Blazer / GMC Jimmy / Oldsmobile Bravada: 1998
- ✔ GMC Envoy: 1998
- ✔ Isuzu Hombre: 1998 (4.3L)