Is your trusted GM truck or van suddenly running rough, stalling, or refusing to start? A failing Powertrain Control Module (PCM) can bring your workhorse to a halt, causing frustrating downtime and costly diagnostic headaches. Get your vehicle back on the road and running dependably with this fully programmed PCM, designed as a direct-fit replacement for a wide range of Chevrolet and GMC vehicles. We take the guesswork out of the repair by flashing the module with the latest GM software updates, tailored specifically to your vehicle’s VIN. This isn’t just a part; it’s a complete, ready-to-install solution that restores the performance and reliability you depend on every day.
Common Symptoms & Your Solution
A faulty PCM can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing any of the following, this module is the definitive solution:
- Persistent Check Engine Light (CEL) with various codes
- Engine stalling, stumbling, or rough idling
- Harsh or erratic transmission shifting
- Complete no-start condition with power to all other systems
- Poor fuel economy and loss of power
- Communication error codes (U-codes) with scan tools
Replacing your old module with our Programmed 16265035 PCM directly addresses the root cause of these electronic issues, saving you from replacing perfectly good sensors and other components.
Features & Benefits
- âś” VIN-Specific Programming: We flash the module with your vehicle’s exact VIN, ensuring it communicates perfectly with your specific systems and options. No expensive trip to the dealer for programming is required.
- âś” Plug & Play Installation: Once you receive the part, installation is straightforward. In most cases, you simply disconnect the battery, swap the modules, and reconnect.
- âś” Updated GM Software: Your module arrives with the newest stable software from General Motors, which can resolve factory bugs and improve engine and transmission performance.
- âś” Restored Engine Efficiency: A properly functioning PCM is critical for managing fuel delivery, spark timing, and emissions. This replacement will restore your engine’s original efficiency and power.
- âś” Broad Compatibility: This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787, covering dozens of popular GM trucks, vans, and SUVs.
An Expert’s Note: In my 20 years of diagnostics, I’ve seen countless hours and dollars wasted chasing down phantom issues on these GM Vortec platforms. A mechanic might replace the throttle position sensor, the crank sensor, and even the fuel pump, only to find the problem persists. More often than not, the culprit is a failing PCM sending erratic signals. The logic inside these modules degrades over time. Getting a professionally Programmed 16265035 PCM isn’t just swapping a part—it’s restoring the central command system of your vehicle for a reliable, long-term fix.
Frequently Asked Questions
Do I need to perform any other procedures after installation?
In many cases, the vehicle will start and run immediately. However, some GM vehicles may require a simple security relearn procedure (often called Passlock or VATS) which can be done without special tools and typically takes 10-30 minutes. Instructions are readily available online for your specific model.
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot program and ship your module without it, so please provide it promptly to avoid delays.
Will this fix my transmission shifting problems?
Yes, in many cases it will. The PCM (also known as the ECM or ECU) controls both engine and transmission functions. Erratic shifting, failure to shift, or harsh engagement are common symptoms of a failing module. This replacement restores proper communication and control over the transmission.
What if my original part number is not 16265035?
This module is a direct replacement for several part numbers, including 16263494, 8162634940, and others listed in the description. As long as your vehicle is on the compatibility list and your original module is one of the listed interchanges, this part will work correctly once programmed to your VIN.
Is this a brand new component?
This is a genuine OEM component that has been meticulously inspected, cleaned, and fully tested to ensure it meets or exceeds original factory standards. It is then loaded with fresh, VIN-specific software for your vehicle.
How long does the programming process take?
Our goal is to get you back on the road quickly. Once we receive your VIN, programming is typically completed within one business day, after which your order will be shipped.