Restore Peak Performance to Your GM Truck or SUV
Is your truck suffering from baffling issues like stalling, erratic shifting, a persistent check engine light, or a no-start condition? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the root cause. This replacement PCM, service part number 12602802, is the definitive solution to restore your vehicle’s factory performance, reliability, and efficiency. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle using your VIN. It arrives ready for installation, loaded with the latest GM software updates to ensure optimal operation.
Is Your Truck’s Brain Failing? Common PCM Symptoms
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a faulty module could be to blame:
- ✔ Persistent Check Engine Light with communication-related trouble codes (e.g., U-codes) or random sensor codes.
- ✔ Unexplained engine stalling, stumbling, or misfiring, especially after warming up.
- ✔ Harsh, delayed, or incorrect automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but will not fire.
- ✔ A sudden and significant decrease in fuel economy.
- ✔ Inability to pass state emissions testing due to readiness monitor issues.
- ✔ Intermittent loss of power to gauges or other electronic components.
From the Diagnostic Bay
We once had a 2006 Silverado 2500 come into the shop that had its owner chasing his tail for weeks. He had replaced the throttle body, MAF sensor, and all four O2 sensors trying to fix a rough idle and stalling issue. The codes were all over the place. After hooking up our diagnostic equipment, we noticed the PCM’s live data for fuel trim and injector pulse width was completely erratic. The module itself was failing internally, sending faulty commands. We installed a VIN-programmed PCM just like this one, performed a quick CASE relearn, and the truck ran like it just rolled off the assembly line. It saved the owner from spending hundreds more on unnecessary parts.
Why Choose Our Programmed Silverado 3500 PCM?
This isn’t just a replacement part; it’s a comprehensive solution. When you order, you provide us with your vehicle’s VIN. Our technicians then use that information to flash the module with the most current, stable, and efficient calibration directly from General Motors. This process ensures that all factory software bugs are corrected and that the PCM is perfectly matched to your truck’s specific engine, transmission, and emissions equipment. You get a component that performs better than the original ever did, without the exorbitant cost and hassle of a dealership visit.
Simple Process, Professional Results
Our goal is to make this complex repair as simple as possible for you. The process is straightforward:
- Place Your Order: Add this item to your cart and complete the checkout.
- Provide Your VIN: Reply to your order confirmation email with your 17-digit Vehicle Identification Number.
- We Program & Ship: Our experts flash the module and typically ship it within one business day.
- Install & Drive: Install the module in your vehicle. In many cases, a simple security relearn procedure is all that’s needed to get you back on the road.
This direct-fit Silverado 3500 PCM is also a direct replacement for a wide array of other GM trucks and SUVs from this era, including the Sierra, Tahoe, Yukon, Escalade, and Hummer H2. Please verify the part number or consult the detailed fitment list to confirm compatibility.
Frequently Asked Questions
Do I need to get this PCM programmed?
No. The main benefit of our service is that we program the module for you before shipping. Simply provide your VIN after purchase, and it will arrive ready for installation.
Where is the PCM located on my 2005 Silverado?
On most GMT800 platform trucks and SUVs (like the 2003-2007 Silverado/Sierra), the PCM is located in the engine bay on the driver’s side, typically under or next to the battery tray.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM, then yes, this replacement will resolve the issue. However, if the light is on due to a faulty sensor or other component, that separate issue will still need to be addressed.
What is a CASE relearn and is it required?
A CASE (Crankshaft Position System Variation) relearn is a procedure that calibrates the PCM to the specific signals of your engine’s crankshaft position sensor. While the truck will often run without it, performing a CASE relearn with a capable scan tool is highly recommended to ensure maximum engine smoothness, prevent misfire codes, and turn off the check engine light.
Is this compatible with other part numbers?
Yes, this module with part number 12602802 is a compatible service replacement for several other numbers, including 89017750, 12582605, 12589463, and 89017734.