Programmed GM PCM 12602802 for Silverado, Sierra, Tahoe & More

Restore Your Truck’s Performance!

Get your GM truck or SUV back on the road with this pre-programmed Powertrain Control Module. Flashed to your vehicle’s VIN with the latest software, it’s a direct-fit solution for rough running, shifting issues, and check engine lights. Order now for a simple installation.

$134.99

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Restore Peak Performance to Your GM Truck or SUV

Is your Chevrolet Silverado, GMC Sierra, Cadillac Escalade, or Hummer H2 suffering from baffling electrical issues, poor performance, or a persistent check engine light? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your vehicle’s engine, transmission, and emissions systems. When it begins to fail, it can cause a wide range of frustrating problems that are often difficult to diagnose. This replacement module is the definitive solution to restore your vehicle’s factory performance and reliability.

From the Diagnostic Bay

We recently had a 2005 GMC Sierra 2500 with the 6.0L engine in the shop. The owner was at his wit’s end, chasing a random misfire code (P0300) for months. He had already replaced spark plugs, wires, ignition coils, and even the fuel injectors. Our diagnostics showed that the injector pulse width signals from the PCM were erratic and inconsistent, despite all sensors reading correctly. This pointed to an internal failure in the module’s driver circuits. We installed one of our VIN-programmed PCMs, performed the security relearn, and the truck ran perfectly. It’s a classic example of how a faulty module can mimic a dozen other mechanical problems.

Signs Your GM Powertrain Control Module Needs Replacement

  • ✔ Persistent Check Engine Light (CEL) with communication-related codes (e.g., U-codes) or performance codes that don’t resolve with mechanical repairs.
  • ✔ Rough or unstable engine idle, stalling, or hesitation during acceleration.
  • ✔ Harsh, erratic, or delayed transmission shifting, or getting stuck in one gear.
  • ✔ A noticeable decrease in fuel economy without a change in driving habits.
  • ✔ Complete no-start condition where the engine cranks but will not fire up.
  • ✔ Failure to pass state emissions testing due to readiness monitor issues.
  • ✔ Intermittent loss of power to gauges or other electronic components.

The Direct-Fit Solution: Our Pre-Programmed GM PCM 12602802

Don’t waste time and money at the dealership. We provide a simple, effective solution. This GM PCM 12602802 is a direct replacement for a wide range of popular GM trucks and SUVs. The critical advantage we offer is our professional programming service. Before we ship your part, our technicians will flash the module with the latest GM-certified software, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that the module communicates perfectly with all other systems in your vehicle, right out of the box.

This unit is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. By providing us with your VIN at checkout, you eliminate the need for expensive dealer programming or specialized scan tools. Installation is straightforward for any competent DIY mechanic or professional technician. After installation, a simple security relearn procedure (often called a CASE learn or anti-theft relearn) is typically required, which can be done without special tools and instructions can be easily found for your specific model.

Frequently Asked Questions

Do I need to have this module programmed by a dealer?

No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you place your order, and the module will arrive ready for installation, flashed with the latest GM software for your specific vehicle.

What is a security relearn procedure?

This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. For most GM vehicles of this era, it involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this cycle three times. It does not require any special tools.

Where is the PCM located on my vehicle?

On most compatible models like the Silverado, Sierra, Tahoe, and Suburban, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.

How do I know if this part will fit my truck?

This GM PCM 12602802 fits a wide variety of models from 2003-2007. Please review the detailed fitment list on this page. The best way to ensure compatibility is to match the service number on your original module to one of the numbers listed (e.g., 12602802, 89017750, etc.).

What information do you need from me?

After you complete your purchase, we require your 17-digit Vehicle Identification Number (VIN) to program the module correctly. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield) or on your insurance and registration documents.

MPN

12602802

Year
Conditions & Options

12589463

Genuine OEM

Yes

Condition

Refurbished

PartNumber

590

Model

2006-avalanche-1500

Make

Year

2004

Brand

CHEVROLET TRUCK

Manufacturer Part Number

Interchange part number

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