Restore Peak Performance to Your GM Truck or SUV
Is your 1998 Chevrolet Blazer, GMC Jimmy, or another GM vehicle from that era running rough, stalling, or displaying a persistent Check Engine Light? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the electronic brain of your vehicle. When it begins to fail, it can cause a cascade of frustrating and seemingly unrelated issues. This replacement PCM, part number 16258815 / 09355699, is the reliable and cost-effective solution to get your vehicle running smoothly again.
This isn’t just a used part pulled from a shelf. We take a quality, tested computer from a salvaged vehicle and program it specifically for your truck or van using your unique Vehicle Identification Number (VIN). This critical step ensures that the module has the correct software and calibrations for your engine, transmission, and factory options. We also load the latest available software updates from General Motors, which can resolve common drivability issues and improve overall performance and efficiency. Stop chasing symptoms and replace the core component responsible for managing your vehicle’s essential systems.
Is Your Vehicle Showing Signs of a Failing PCM?
A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, a failing engine computer could be the culprit. Replacing your faulty unit with our pre-programmed 1998 Blazer S10 PCM is a direct path to a solution.
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A noticeable decrease in fuel economy
- ✔ The engine cranks but refuses to start
- ✔ Failure to pass state emissions testing
- ✔ Communication errors with diagnostic scan tools
- ✔ Inconsistent or non-functional gauges on the instrument cluster
The Importance of VIN Programming
In modern vehicles, and especially in GM trucks and SUVs from the late 90s, the PCM is tied to the specific vehicle it came from. You cannot simply swap a used computer from another vehicle and expect it to work. The VIN programming process is essential for several reasons:
- Compatibility: It ensures the software matches your vehicle’s specific engine (4.3L, 5.0L, 5.7L), transmission type, and emissions equipment.
- Security System: The programming syncs the PCM with your vehicle’s anti-theft system (VATS/Passlock). Without this, the vehicle will not start.
- Performance: Loading the latest GM updates can correct factory bugs and improve fuel mapping and transmission shift points for a better driving experience.
By providing us with your VIN after purchase, you eliminate the need for an expensive trip to the dealership for programming. This module arrives at your door ready for a straightforward installation and a security relearn procedure that you can perform yourself.
Guaranteed Fitment for a Wide Range of GM Vehicles
While this is a perfect solution for a 1998 Blazer S10 PCM, this module is also the correct replacement for a vast number of other GM models. It is a direct replacement for part numbers 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. Please verify your original part number or consult the detailed fitment list provided to confirm compatibility with your specific vehicle, which includes models like the Chevy Tahoe, Suburban, C/K Pickups, Express Van, and their GMC counterparts like the Yukon, Sierra, and Savana.
Frequently Asked Questions
What exactly does the PCM do?
The Powertrain Control Module is the central computer that controls all aspects of the engine and transmission. It takes data from sensors all over the vehicle (like oxygen sensors, crank position sensors, etc.) and uses that information to control fuel injection, ignition timing, and transmission shift points to ensure optimal performance, fuel economy, and emissions.
Do I need to do anything after I install this computer?
Yes. While the module is programmed to your VIN, you will need to perform a security relearn procedure, often called a VATS or Passlock relearn. This typically involves a sequence of turning the key on and off for set periods of time and can be done without any special tools. Instructions for this procedure are widely available online for your specific model.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard visible through the windshield.
Is this a new part?
No, this is a high-quality, tested, and guaranteed functional computer sourced from a salvaged vehicle. This provides a reliable and affordable alternative to a costly new module from the dealer.
My original part number isn’t 16258815, but it’s on your list. Will this work?
Absolutely. The part numbers listed (like 09355699, 16266645, etc.) are all interchangeable. As long as your original part number is in our cross-reference list, this module will function correctly in your vehicle once programmed to your VIN.