Restore Peak Performance to Your GM Truck or Van
Is your 2005-2006 Chevrolet Avalanche 2500 running rough, refusing to start, or throwing baffling check engine light codes? As a technician with over two decades of experience under the hood, I’ve seen these symptoms countless times. Often, the root cause isn’t a dozen different sensors, but the one component that controls them all: the Powertrain Control Module (PCM). This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s drivability, fuel efficiency, and reliability.
We take the guesswork and dealership hassle out of the equation. This PCM, compatible with part numbers 12589462, 12602801, and 89017749, arrives at your doorstep programmed with the latest GM software updates specifically for your vehicle. Simply provide your Vehicle Identification Number (VIN) after purchase, and our experts will flash the module. This ensures it communicates perfectly with your truck’s engine, transmission, and other systems right out of the box, making the repair process smoother and more affordable.
A Technician’s Notebook
I remember a 2006 Suburban 2500 with the big 8.1L engine that came into my bay with a frustrating intermittent no-start condition. The owner had already replaced the battery, starter, and crank sensor. Scans showed a U0100 Lost Communication with ECM/PCM code, but only sporadically. After checking the wiring harness and grounds, we suspected the PCM itself was failing internally, especially when hot. We swapped in a VIN-programmed module like this one. The total time for the physical install was under 30 minutes. The truck fired up instantly and the problem never returned. It’s a classic case where the vehicle’s ‘brain’ was causing a ghost in the machine.
Is Your Truck Showing These Signs of a Faulty PCM?
- ✔ Check Engine Light is on with codes like P0601, P0602, or P0606 (Internal Control Module Failure).
- ✔ Vehicle has a no-start or hard-start condition.
- ✔ Erratic or harsh automatic transmission shifting.
- ✔ Noticeable drop in fuel economy.
- ✔ Engine stalling, sputtering, or misfiring unexpectedly.
- ✔ Communication errors with scan tools.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Getting your truck back on the road is easier than you think. Since we handle the programming, your job is a simple component swap. For the 2005-2006 Avalanche 2500 PCM, the module is typically located in the engine bay, under the battery tray.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Access the Module: You will likely need to remove the battery and the battery tray to gain clear access to the old PCM.
- Disconnect the Old PCM: Carefully unplug the electrical connectors. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Module: Unbolt the old PCM from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in place and securely fasten it.
- Reconnect Everything: Plug the electrical connectors firmly into the new PCM until they click. Reinstall the battery tray and the battery, then reconnect the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure may be required. This can often be done without special tools by cycling the key in the ignition. Your vehicle’s service manual will have specific instructions. Start the engine and check for proper operation.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles. Please verify your vehicle, year, and options below to ensure proper fitment. This unit replaces part numbers 12589462, 12602801, and 89017749.
ASTRO 05 Electronic Control Module; (LH front by battery)
BLAZER S10/JIMMY S15 05 Electronic Control Module; (RH front engine compartment)
CTS 04-05 Electronic Control Module; (RH engine compartment), V-Series, ID 12589462 or 12602801
EXPRESS/SAVANA VANS 1500/2500/3500 05-07 Electronic Control Module; (LH rear engine compartment), gasoline engines
SAFARI (GMC) 05 Electronic Control Module; (LH front by battery)
SIERRA/SILVERADO 1500 05-07 Electronic Control Module; (LH front under battery), w/o hybrid, w/4.3L (Classic style for 07)
SIERRA/SILVERADO 2500/3500 05-07 Electronic Control Module; (LH front under battery), gasoline, 8.1L (Classic style for 07)
SUBURBAN 2500 05-06 Electronic Control Module; (LH front under battery), 8.1L
YUKON XL 2500 05-06 Electronic Control Module; (LH front under battery), 8.1L
Frequently Asked Questions
What does “VIN Programmed” mean?
It means we load the module with the specific factory software for your truck using its unique 17-digit VIN. This ensures all factory settings for the engine, transmission, and options are correct, eliminating the need for an expensive trip to the dealership for programming.
Do I need any special tools to install this?
No special programming tools are required. You will only need basic hand tools like a socket set to remove the battery, battery tray, and the module itself. The complex part is done for you before we ship.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s VIN. We cannot ship the module until we receive this information to program it correctly.
Will this fix my specific problem?
This PCM is a direct solution for failures within the module itself, which cause the symptoms listed above. While it solves a very common point of failure, you should always ensure your vehicle’s issues are not caused by bad wiring, sensors, or other components. A proper diagnosis is key.
Are these modules tested?
Yes, every module is thoroughly tested to ensure full functionality before being programmed and shipped. We stand behind the quality and reliability of our parts to get you back on the road with confidence.