Restore Peak Performance to Your GM Truck or Van
Is your late-90s Chevrolet or GMC truck suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine’s performance. This pre-programmed PCM, service number 9355699, is the definitive solution to get your vehicle running reliably again. It’s not just a replacement part; it’s a direct-fit, VIN-programmed component that restores your vehicle’s original operating parameters with the latest GM software updates.
From the Diagnostic Bay
We had a 1998 Chevy Blazer come in that was driving the owner crazy. It would randomly stall at stoplights and had an intermittent misfire that no one could pinpoint. They had already replaced the plugs, wires, cap, and rotor. After hooking up our diagnostic scanner, we noticed the data stream from the PCM would occasionally drop out just before a stall. We suspected an internal fault in the module. We installed one of these VIN-programmed 9355699 units, performed the quick security relearn, and the truck ran perfectly. It’s a common failure point on these vehicles, and a correctly programmed PCM is often the fix that mechanics overlook.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling or cutting out unexpectedly
- ✔ Rough or erratic idle
- ✔ Noticeable decrease in fuel efficiency
- ✔ Difficulty starting or a no-start condition
- ✔ Failed emissions test
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Inability to communicate with the module using a scan tool
Why Choose Our 1998 S10 PCM Solution?
Finding a reliable computer for an older vehicle can be a challenge. Our solution simplifies the process. This is a genuine, used GM module that has been thoroughly inspected and tested. The critical difference is our professional programming service. Before we ship the part, we flash it with the latest GM calibration specific to your vehicle’s 17-digit Vehicle Identification Number (VIN). This ensures that all engine, transmission, and emissions parameters are perfectly matched to your truck or van’s original specifications. This eliminates the need for an expensive trip to a dealership for programming, making the installation process straightforward for any DIY mechanic or professional shop.
This module is a direct replacement for several part numbers, including 09355699, 16266645, 16250279, 16258815, 09366810, and 9366810. Please verify that your current module has one of these numbers to ensure a perfect match.
Installation Note:
Installation is as simple as disconnecting the battery, unplugging the electrical connectors from your old PCM, unbolting it, and installing the new one in its place. After reconnecting the battery, some vehicles may require a simple security relearn procedure to sync the new module with the vehicle’s anti-theft system. This can typically be done without any special tools and involves a series of key cycles.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and the module will arrive ready to install.
Is this a new part?
No, this is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. This ensures genuine GM quality and compatibility that often surpasses aftermarket alternatives.
What is a security relearn procedure?
It’s a simple process that allows your vehicle’s anti-theft system to recognize the replacement PCM. It usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle a few times. Instructions are widely available online for your specific model.
How do I find my original part number?
Your part number is printed on a sticker directly on your vehicle’s current PCM. You will need to locate the module in the engine bay (location varies by model) and read the number from the label.
Will this fix my vehicle’s problem?
This module will correct any issues directly caused by a faulty PCM. While the symptoms listed are common indicators of PCM failure, we always recommend a thorough diagnosis by a qualified mechanic to confirm the PCM is the root cause of your problem.
What information do you need from me?
After you complete your purchase, we will need your complete 17-digit Vehicle Identification Number (VIN) to program the module correctly for your specific vehicle configuration.