Is Your GM Truck or SUV Running Rough? Get It Back in Top Form.
There’s nothing more frustrating than a reliable workhorse like a 90s Chevy or GMC truck that suddenly starts acting up. If you’re dealing with a persistent check engine light, erratic shifting, stalling, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. Don’t let a faulty computer sideline your vehicle. This fully programmed engine computer is the straightforward, reliable solution to get you back on the road with confidence.
Common Symptoms & Your Solution
A failing PCM can cause a cascade of confusing issues that can be difficult to diagnose. This module is the definitive fix for problems such as:
- Persistent Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs).
- Harsh or erratic automatic transmission shifting.
- Engine stalling, stumbling, or refusing to start.
- Poor fuel economy and reduced engine power.
- Intermittent electrical or sensor-related problems that seem to have no other cause.
This Programmed 16266645 PCM is meticulously flashed with the latest official GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures it works seamlessly with your truck, van, or SUV’s existing systems, restoring its original performance and reliability right out of the box.
Features & Real-World Benefits
- ✔ Programmed to Your VIN: We flash the module with your vehicle’s exact data before shipping, eliminating the need for expensive dealership programming. This is a true plug-and-play solution.
- ✔ Latest GM Software: Your computer arrives with the most current calibrations from General Motors, ensuring optimal engine performance, fuel efficiency, and transmission function.
- ✔ Broad Compatibility: A direct replacement for multiple part numbers, including 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810, covering a wide range of popular GM models.
- ✔ Cost-Effective Repair: Get a quality, tested OEM computer at a fraction of the cost of a new unit from a dealer, without sacrificing reliability.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Diagnostic Tip
“Over my 20 years under the hood, I’ve seen countless owners replace perfectly good transmissions, fuel pumps, and sensors because they were chasing symptoms caused by a failing PCM. A bad computer can send false signals, making other components appear faulty. Before you spend hundreds or even thousands on the wrong parts, consider the brain of the operation. Swapping in a correctly Programmed 16266645 PCM often resolves these ‘ghost’ issues instantly, saving you time, money, and a massive headache.”
This is a quality used OEM part sourced from a salvaged vehicle, cleaned, and inspected. By providing us with your VIN upon purchase, you ensure that the Programmed 16266645 PCM you receive is perfectly matched to your vehicle’s specific configuration, making installation as simple as possible.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) contains critical information about your vehicle’s specific options, engine, transmission, and emissions systems. We use the VIN to load the exact, correct GM factory software onto the PCM, ensuring it communicates perfectly with your vehicle for a seamless installation.
Is this part difficult to install?
Physically replacing the PCM is typically straightforward, requiring only basic hand tools. It’s usually located in the engine bay. After installation, you will need to perform a security relearn procedure (often called a CASE relearn) so the PCM can sync with your vehicle’s anti-theft system and crankshaft position sensor. This procedure can often be done without special tools and instructions are widely available online for these models.
Since this part is used, how can I be sure it works?
While the computer housing is from a salvaged vehicle, the critical step is our professional programming process. We flash it with fresh, updated software specific to your VIN. This process verifies the board’s ability to take and hold the programming. Plus, it’s backed by our solid warranty for your peace of mind.
Will this fix my check engine light?
If the check engine light and other symptoms are being caused by a faulty PCM, this part is the correct solution. It is crucial to ensure your vehicle’s underlying mechanical or wiring issues have been addressed first, as the PCM can only operate the systems correctly if the hardware it controls is in good working order.
Do I need to send my old computer back?
No core charge or return is required for this part. You can keep your old module or dispose of it responsibly.