Is Your GM Truck or SUV Running Rough?
If your 1998-2000 Oldsmobile Bravada, Chevy S10, GMC Jimmy, or other compatible GM vehicle is suffering from erratic engine behavior, poor fuel economy, a persistent check engine light, or even a no-start condition, a failing Powertrain Control Module (PCM) is a likely culprit. As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and spark timing to transmission shifting and emissions controls. When it fails, the symptoms can be widespread and frustrating to diagnose.
From the Diagnostic Bay
I once had a 1999 GMC Jimmy come into the shop that had its owner chasing his tail for weeks. The truck had a rough idle and would randomly stall at stoplights. The owner had already replaced the spark plugs, wires, IAC valve, and even the fuel pump, with no improvement. After connecting my scan tool, I noticed erratic data from multiple sensors, but none were consistently failing. This pointed me directly to the PCM. A faulty processor was corrupting the data signals, making it seem like other parts were bad. We installed a VIN-programmed PCM, performed the security relearn, and the truck ran like it just rolled off the assembly line. It’s a classic case of treating the disease, not just the symptoms.
The Direct Solution: A VIN-Programmed 1998-2000 Bravada PCM
Don’t waste any more time or money on parts that won’t fix the root problem. This Powertrain Control Module is the definitive solution for a wide range of GM trucks and vans from the late 90s and early 2000s. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle using your VIN. This ensures that all factory parameters, anti-theft information, and vehicle-specific options are correctly configured before it even ships. Furthermore, we flash it with the latest GM-released software updates, which can resolve common drivability issues and improve overall performance and efficiency.
Common Symptoms of a Failing PCM:
- ✔ Check Engine Light (CEL) is on with various trouble codes
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or unpredictable idling
- ✔ Harsh or failed transmission shifting
- ✔ A noticeable drop in fuel mileage
- ✔ Vehicle fails to start, but the battery and starter are good
- ✔ Failure to communicate with diagnostic scan tools
Replacing your old, faulty module with our correctly programmed unit is the most effective way to restore your vehicle’s performance, reliability, and drivability. Simply provide us with your vehicle’s VIN after purchase, and we’ll handle the complex programming. Installation is straightforward, and in most cases, only a simple security relearn procedure (which you can do yourself) is required to get you back on the road.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and the module will arrive ready for installation, flashed with the latest GM software for your specific vehicle.
Is this a simple plug-and-play installation?
Yes, for the most part. The physical installation is a direct swap. After installation, you will likely need to perform a security relearn procedure, also known as a VATS relearn. This can typically be done without special tools and involves a series of key cycles. Instructions are widely available online for your specific model.
How do I know if this part number is correct for my vehicle?
This module replaces several part numbers, including 16263494 and 16265035. The best way to confirm is to check the part number on your original module’s sticker. However, our VIN programming ensures compatibility even if the part numbers are slightly different, as long as your vehicle is on the fitment list.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty PCM, then yes, this will resolve the issue. However, if there are other failing sensors or mechanical problems with your vehicle, those will still need to be addressed separately.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECU (Engine Control Unit) is a general term. ECM (Engine Control Module) typically only controls engine functions. PCM (Powertrain Control Module) is more comprehensive and controls both the engine and the transmission. For this generation of GM vehicles, it is correctly called a PCM.