Restore Your GM Truck’s Performance and Reliability
Is your truck, van, or SUV suffering from baffling electrical gremlins? Issues like stalling, erratic shifting, a persistent check engine light, or a no-start condition often point directly to a failing Powertrain Control Module (PCM). Don’t let a faulty computer keep your reliable workhorse off the road. This is the straightforward, effective solution you’ve been looking for to restore your vehicle’s brain and get it running like it should.
Common Symptoms & Your Solution
A failing PCM can manifest in numerous frustrating ways. You might be experiencing poor fuel economy, a transmission that won’t shift correctly, or diagnostic trouble codes (DTCs) that won’t clear, such as P0601, P0605, or other internal controller errors. This replacement module is the definitive fix. We take a tested, working computer and flash it with the latest official GM software updates, specifically programmed to your vehicle’s unique VIN. This ensures perfect communication between the engine, transmission, and all other onboard systems, eliminating the guesswork and getting you back to work. When you install our Programmed 16266645 PCM, you’re not just replacing a part; you’re restoring your vehicle’s core operational integrity.
- ✔ VIN-Programmed for You: We flash the latest GM software using your VIN before shipping. This means no expensive programming sessions at the dealership—it’s ready for installation right out of the box.
- ✔ Restores Peak Performance: Put an end to rough idling, poor gas mileage, hard starts, and incorrect transmission behavior caused by a faulty computer.
- ✔ Direct-Fit Functionality: This module is a direct replacement for a wide range of part numbers, including 09355699, 16250279, 16258815, and 9366810, guaranteeing compatibility with your vehicle.
- ✔ Smart, Cost-Effective Repair: Avoid the high cost and hassle of sourcing a new module. This is a dependable, tested unit that provides a reliable solution without breaking the budget.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
Expert Insight: The Brains of Your Operation
On these late-90s GM vehicles, the PCM is more than just an engine controller; it’s the central command for the entire powertrain. It constantly analyzes data from dozens of sensors to manage everything from fuel mixture and ignition timing to transmission shift points and torque converter lockup. When it fails, the signals get crossed, leading to the frustrating and seemingly unrelated problems you’re likely facing. A properly functioning, correctly programmed PCM is the single most critical component for smooth, efficient, and reliable operation. This is why our VIN-specific programming is so essential—it ensures the computer knows exactly what vehicle it’s in, restoring that crucial factory-level communication.
Frequently Asked Questions
Do I need to do any programming after I install it?
No. We program the unit to your VIN before it ships, so it’s ready to install. In some cases, a simple security relearn procedure (often called a CASE learn or anti-theft relearn) may be required, which can typically be done without special tools by following a sequence of key turns. Instructions are widely available online for this process.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or reply to your order confirmation email. We cannot ship your part until we receive the VIN.
Is this a new part?
No, this is a thoroughly tested, used OEM computer that was sourced from a salvaged vehicle. We ensure it is fully functional before programming and shipping it to you.
What if my original part number isn’t an exact match to 16266645?
Please check the extensive compatibility list provided. This single computer module serves as a direct replacement for numerous original part numbers, including 09355699, 16250279, and others. As long as your vehicle is on the fitment list, this Programmed 16266645 PCM will work correctly.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your old PCM (common codes include P0601-P0606), then yes, this part is the correct solution. However, if the light is on due to other issues like a faulty sensor or mechanical problem, those issues will need to be addressed separately.