Restore Your Truck’s Core Performance
Is your 2005-2006 Chevrolet Avalanche 2500 running rough, refusing to start, or throwing a check engine light that just won’t quit? A failing Powertrain Control Module (PCM) can bring your powerful truck to a standstill, causing frustrating issues like erratic shifting, poor fuel economy, and a host of confusing diagnostic codes. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s reliability. Get back to dependable operation with this direct-fit, VIN-programmed engine computer, engineered to restore your truck’s original performance and get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty PCM is the hidden culprit behind many perplexing vehicle issues. If you’re experiencing any of the following, our programmed 12602801 PCM is the definitive solution:
- Check Engine Light: Persistent illumination with codes like P0601, P0606 (Internal Module Failure), or communication errors (U-codes).
- No-Start Condition: The engine cranks but won’t start, often due to a lack of fuel injector or ignition coil command from the PCM.
- Poor Drivability: Experiencing harsh transmission shifts, engine stalling, hesitation, or a significant loss of power.
- Erratic Behavior: Gauges acting strangely, or other electronic modules failing to communicate with the engine computer.
Don’t let a failing module dictate your truck’s performance. This unit is meticulously prepared with the latest GM software updates, tailored specifically to your vehicle’s VIN, ensuring a seamless and effective repair.
Features & Benefits
- ✔ VIN-Programmed for Your Avalanche: Arrives ready to install, flashed with your truck’s specific calibration files. This eliminates the need for expensive dealership programming.
- ✔ Latest GM Software Updates: We load the most current software from General Motors, which often includes fixes for factory bugs, improving drivability and transmission performance.
- ✔ Direct-Fit Replacement: Engineered to replace OEM part numbers 12589462, 12602801, and 89017749, guaranteeing a perfect match for your vehicle.
- ✔ Restores Peak Operation: Resolves common issues caused by a failing computer, restoring proper engine function, fuel economy, and smooth shifting.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: More Than Just a Box
For a heavy-duty vehicle like the Avalanche 2500, especially with the powerful 8.1L engine, the PCM isn’t just a simple computer—it’s the central command for your powertrain. It constantly calculates engine load, towing demands, and driver input to manage everything from the precise moment of spark plug firing to the hydraulic pressure in the transmission for smooth gear changes. Using a generic, non-programmed module can lead to catastrophic transmission damage or poor engine performance. Our VIN-specific programming ensures that all these critical calculations are based on the exact factory specifications for your truck, protecting your investment and ensuring it performs as the engineers intended.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure, which can typically be done without special tools and takes about 30 minutes. Some vehicles may also require a Crankshaft Position Sensor (CASE) relearn, which requires a capable scan tool. Instructions for the security relearn are readily available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as the programming is specific to your truck.
Is this compatible with other GM trucks and vans?
Yes, this programmed 12602801 PCM is compatible with a wide range of GM vehicles, including various Silverado, Sierra, Suburban, Yukon, Express, and Savana models. Please check the detailed fitment list on this page to confirm it matches your specific year, make, model, and engine.
Will this fix my specific check engine light code?
This module is a direct solution for internal processor failure codes like P0601, P0602, P0606, and many communication-related U-codes. While it can resolve issues causing other codes (like misfires or sensor faults), it’s crucial to ensure the underlying components (e.g., spark plugs, sensors) are also in good working order.
What if my original part number is slightly different?
This unit is a direct replacement for several part numbers, including 12589462 and 89017749. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN, even if the number on your old unit differs.