Restore Peak Performance to Your GM Truck or SUV
Is your 1998 Chevy Blazer, GMC Jimmy, or another GM vehicle from that era suffering from perplexing issues like stalling, erratic shifting, or a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer responsible for managing your engine and transmission. This direct-fit replacement PCM, part number 09355699, is the definitive solution to restore your vehicle’s reliability and drivability. It arrives at your door pre-programmed with the latest GM software updates, specifically matched to your vehicle’s VIN. This critical programming step ensures a seamless installation and proper communication with all your vehicle’s systems, eliminating the guesswork and the need for an expensive trip to the dealership.
Is a Failing 1998 Blazer S10 PCM Causing Your Headaches?
The PCM is the brain of your vehicle’s operation. When it begins to fail, the symptoms can be widespread and often misdiagnosed. Internal circuit board failures, cracked solder joints from years of heat cycles, or component degradation can lead to a host of performance problems. Replacing a faulty module is often the only way to permanently resolve these issues. This unit is a reliable, plug-and-play solution once programmed for your specific vehicle.
Common Symptoms of a Faulty PCM
- ✔ Check Engine Light: The light may be on with codes related to internal module failure or communication errors (U-codes).
- ✔ No-Start or Stalling: The engine may crank but not start, or it may stall intermittently while driving, especially when warm.
- ✔ Poor Engine Performance: You might experience rough idling, hesitation on acceleration, reduced power, and decreased fuel economy.
- ✔ Erratic Transmission Shifting: The PCM controls shift points. A failing module can cause harsh shifts, delayed shifting, or getting stuck in one gear (limp mode).
- ✔ Failed Emissions Test: Improper engine management from a faulty PCM can lead to an immediate failure at the emissions station.
- ✔ Inoperative Gauges or Accessories: In some cases, the PCM’s failure to communicate can affect other modules on the data network.
VIN Programming is Not Optional—It’s Essential
Unlike a simple sensor, a PCM cannot be swapped from one vehicle to another without proper programming. Each vehicle has a unique software calibration based on its engine, transmission, emissions equipment, and other factory options. We take the guesswork out of the process. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our technicians will flash this module with the precise GM-certified software for your truck or SUV. This ensures that your engine runs efficiently, your transmission shifts smoothly, and your anti-theft system functions correctly right out of the box. This service saves you hundreds of dollars in dealership programming fees and ensures a successful repair.
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810 and fits a wide range of 1998-1999 GM vehicles, including the Chevrolet and GMC C/K Pickups, Suburban, Tahoe, Yukon, Astro/Safari vans, and more. Please verify your part number and consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
What is a PCM?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission function, including fuel injection, ignition timing, and transmission shift points, to ensure optimal performance, fuel economy, and emissions.
Do I need to get this module programmed?
No, we handle the programming for you before we ship the part. You must provide your vehicle’s VIN at checkout so we can load the correct software for your specific vehicle. This makes the installation process much simpler for you.
Where is the PCM located on a 1998 Chevy Blazer S10?
On the 1998 Blazer S10 and GMC Jimmy S15, the PCM is typically located in the engine compartment on the passenger side, near the firewall or mounted to the inner fender.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM, then yes, this replacement module will resolve the issue. However, it’s always best to have the codes scanned to ensure the problem isn’t a separate sensor or component.
Is any additional setup required after installation?
After installing the programmed PCM, you will likely need to perform a security relearn procedure, also known as a CASE (Crankshaft Angle Sensor Error) relearn. This is a simple process that can often be done without special tools and synchronizes the new PCM with your vehicle’s security and engine systems. Instructions are readily available online for this procedure.