Restore Peak Performance to Your GM Truck or SUV
Is your Cadillac Escalade, Chevy Silverado, or GMC Sierra suffering from erratic behavior? Issues like a persistent check engine light, poor fuel economy, harsh shifting, or even a no-start condition can often be traced back to a failing Powertrain Control Module (PCM). This module is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shift points. When it fails, the entire vehicle’s performance and reliability are compromised.
This replacement PCM, part number 28042802, is the definitive solution for a wide range of GM trucks and SUVs from 2003 to 2007. We take the guesswork out of the repair process. Upon purchase, simply provide us with your vehicle’s VIN. Our technicians will then program the module with the latest, most stable software updates directly from GM, ensuring it is perfectly matched to your vehicle’s specific configuration. This means no need for an expensive trip to the dealership for programming—it arrives at your door ready for installation.
From the Diagnostic Bay
We had a 2005 Silverado 2500 with the 6.0L towed in for a ‘no communication with PCM’ issue. The owner had already replaced the module with one from a salvage yard, but the problem persisted. Before condemning another PCM, we checked the basics. A quick voltage drop test on the main PCM ground wire located under the driver’s door revealed high resistance. After cleaning the corroded grounding point on the frame and the terminal itself, the original PCM came back online and the truck started right up. It’s a powerful reminder: always verify power and grounds to the module before replacing it. A faulty ground can mimic a completely dead PCM.
Is a Failing 2003-2006 Escalade PCM Causing Your Problems?
The PCM is a complex electronic component that can fail due to various factors, including heat cycles, vibration, and voltage spikes. A failing module can manifest in numerous ways, often intermittently at first, making diagnosis difficult. If your vehicle is exhibiting several of the symptoms below, a faulty PCM is a likely culprit.
Common Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) with various communication or sensor codes (e.g., U-codes, P0601-P0606).
- ✔ Vehicle refuses to start or stalls intermittently.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Engine misfires, stumbling, or poor acceleration.
- ✔ Inaccurate or non-functional gauges on the instrument cluster.
- ✔ Failure to pass state emissions testing.
- ✔ Communication issues with diagnostic scan tools.
A Simple, Programmed Solution
Don’t let a faulty computer keep your powerful truck or luxury SUV off the road. This replacement module is a reliable and cost-effective way to restore your vehicle’s factory performance. By providing your VIN, you ensure that the unit you receive is correctly calibrated for your engine, transmission, tire size, and other factory options. This is a crucial step for proper operation. Once installed, you may need to perform a simple security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. Restore the reliability and driveability of your vehicle with this professionally programmed PCM.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls the engine and transmission functions by reading data from various sensors and making real-time adjustments to fuel delivery, spark timing, and transmission shifting to ensure optimal performance, fuel economy, and emissions.
Is this part difficult to install?
The physical installation is straightforward for a DIY mechanic. The PCM is typically located in the engine bay, under the battery tray or next to the airbox. It involves disconnecting the battery, unplugging the electrical connectors, and unbolting the module. The most important part is ensuring you provide the correct VIN for programming before shipment.
Do I need to do anything after I install this PCM?
In many cases, you will need to perform a security relearn procedure, also known as a VATS (Vehicle Anti-Theft System) relearn. This procedure syncs the new PCM with your vehicle’s ignition key and security system. It can often be done without any special tools and instructions are widely available online for your specific model.
How do I provide my VIN number?
After completing your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module until we receive this information. Please double-check the VIN for accuracy.
Will this PCM fix my transmission shifting problems?
If the shifting problems are caused by faulty electronic commands from the old PCM, then yes, this new module will resolve them. The PCM controls the transmission solenoids that manage shifting. However, it will not fix internal mechanical issues within the transmission itself.
This part is compatible with which service numbers?
This module is a direct replacement for several service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802.