Is Your Trusty GM Truck or SUV Acting Up?
There’s nothing more frustrating than when a dependable vehicle starts developing mysterious problems. If your late-90s Chevy, GMC, or Cadillac is stalling, shifting erratically, or showing a persistent check engine light, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just a part; it’s the brain of your engine. We’re here to provide the precise, reliable solution to get your vehicle back on the road and running strong, just like it should.
Common Symptoms & Your Solution
A faulty engine computer can cause a cascade of issues that can be difficult to diagnose. You might be experiencing:
- Intermittent or total no-start conditions
- Poor fuel economy and rough idling
- Harsh or incorrect automatic transmission shifting
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs)
- Stalling for no apparent reason
This professionally programmed 09355699 PCM is the definitive solution. We take a genuine, tested OEM computer and flash it with the latest official GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures perfect communication between your engine, transmission, and all related systems, effectively erasing those frustrating electrical gremlins.
Features & Real-World Benefits
- โ VIN-Programmed for Your Vehicle: No need for expensive dealer visits. This unit arrives ready for installation, pre-configured to match your truck or SUV’s exact specifications for a seamless replacement.
- โ Loaded with Latest GM Updates: We flash the module with the most current software from General Motors, which can improve idle quality, transmission performance, and overall drivability compared to your original unit.
- โ Restored Engine Performance: By re-establishing correct sensor readings and engine parameters, this computer helps restore the power, efficiency, and smooth operation you depend on.
- โ Cost-Effective & Reliable: Get the quality and compatibility of a genuine GM part without the high cost of a new-from-dealer component. It’s the smart fix for your workhorse vehicle.
- โ This unit is backed by our one-year replacement warranty for your complete confidence.
From the Technician’s Bench
I’ve seen countless 4.3L, 5.0L, and 5.7L Vortec engines from this era come into the shop with issues that stump owners. They’ll replace sensors and chase wires for weeks, but the problem lies with the PCM itself. The solder joints and capacitors inside these original modules can degrade after 20+ years of heat cycles. A correctly programmed 09355699 PCM isn’t just a replacement part; it’s a foundational fix that restores the vehicle’s core logic. Once installed, remember that a security relearn procedure (often called Passlock or Passkey) and a Crankshaft Variation Relearn (CASE relearn) will likely be necessary. This is a standard step and ensures your new computer communicates perfectly with the rest of the vehicle for optimal performance.
Frequently Asked Questions
What information do you need from me?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. This is crucial for us to program the computer correctly before shipping.
Is this a plug-and-play part?
For the most part, yes. We handle the main programming. However, on most GM vehicles of this era, you will need to perform a simple Security Relearn procedure after installation so the vehicle recognizes the new computer. This procedure can be done without special tools and instructions are readily available online.
My original part number isn’t 09355699, but it’s on the list. Will this work?
Yes. Part number 09355699 is a hardware number that is compatible with all the alternate part numbers listed (like 16266645, 16250279, etc.). We use your VIN to load the exact software your vehicle needs onto this compatible hardware.
Is this a new computer?
No, this is a high-quality, tested computer sourced from a salvaged vehicle. We thoroughly inspect and then program each unit to ensure it meets or exceeds original factory standards for performance and reliability.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM or internal computer error codes, this will resolve the issue. It’s important to ensure that any codes are not being caused by other failing components on the vehicle, such as a bad sensor.