Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. Don’t let a faulty module keep your truck off the road. This direct-fit replacement PCM, part number 12602802, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike units from a salvage yard that require expensive dealer programming, this module arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest, most stable software updates from GM, ensuring all factory parameters for fuel delivery, ignition timing, and transmission control are perfectly calibrated. This eliminates guesswork and provides a seamless installation process.
Solving Issues with a Pre-Programmed 2003-2007 GM PCM
The PCM is the brain of your vehicle’s powertrain. When it begins to fail, it can manifest in numerous ways that are often misdiagnosed as individual sensor or component failures. Replacing the PCM with a correctly programmed unit addresses the root cause, saving you time and money on unnecessary repairs. This module is a direct replacement for several service numbers, including 89017750, 12582605, 12589463, 89017734, and 28042802, ensuring broad compatibility across the GM truck and SUV lineup.
Common Failure Symptoms
- ✔ Persistent Check Engine Light (CEL) with communication codes (e.g., U0100) or internal processor codes (P0601, P0606).
- ✔ Vehicle refuses to start or stalls intermittently.
- ✔ Harsh, erratic, or delayed transmission shifting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine misfires, runs rough, or idles poorly.
- ✔ Inability for diagnostic scan tools to communicate with the module.
- ✔ Other electronic systems acting erratically due to network communication failures.
Installation is straightforward. Once you’ve swapped the hardware, you will need to perform a simple security relearn procedure, also known as the Passlock or VATS relearn. This procedure pairs the new PCM to your vehicle’s anti-theft system and does not require any special tools. It typically involves a series of key cycles over a 30-minute period. Detailed instructions are readily available and easy to follow.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. We program the module to the VIN you provide before shipping it. It arrives ready for installation and the security relearn procedure.
What is the security relearn procedure?
It’s a simple, tool-free process that syncs the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times.
How do I provide my VIN?
You can add your vehicle’s 17-digit VIN to the notes section during checkout. If you forget, we will contact you via email to retrieve it before we program and ship your part.
Will this fix my specific problem?
This module will resolve any issues directly caused by a faulty PCM. If you are experiencing any of the common symptoms listed, there is a very high probability that this part is the solution. Proper vehicle diagnosis is always recommended.
Is this compatible with my vehicle?
This part fits a wide range of 2003-2007 GM trucks and SUVs. Please review the detailed fitment list on this page and confirm your original part has one of the compatible service numbers (e.g., 12602802, 89017750, etc.) to ensure a perfect match.