Restore Peak Performance to Your GMC 3500
Is your 2001-2002 GMC 3500 pickup running rough, shifting erratically, or failing to start? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your truck’s engine and transmission. A faulty PCM can lead to a host of frustrating and performance-robbing issues, leaving your reliable workhorse sidelined. This replacement Electronic Control Module, part number 52369718, is the definitive solution to get your truck back to factory-spec operation without the exorbitant cost and hassle of a dealership visit.
The PCM is responsible for managing critical functions, including fuel mixture, ignition timing, transmission shift points, and emissions systems. When it begins to fail, communication between sensors and mechanical components breaks down, resulting in poor performance and potential engine damage. Our service simplifies the repair process. We take a genuine GM module and program it with the latest official software updates specifically for your truck using the Vehicle Identification Number (VIN) you provide. This ensures a seamless, plug-and-play installation process that restores lost power, efficiency, and reliability.
From the Diagnostic Bay
We had a 2002 Sierra 2500 (which uses the same PCM) come into the shop with a bizarre, intermittent no-start condition. The owner had already replaced the battery, alternator, and starter. It would run fine for days, then refuse to crank. After hours of chasing wires, we noticed the security light was flashing during the no-start events. A scan tool showed a ‘loss of communication with PCM’ code that would only appear when the fault was active. We suspected the PCM was failing when it got hot. We swapped in a VIN-programmed module like this one, performed the security relearn, and the truck fired up instantly. The customer called a month later to say the problem was completely gone. It’s a reminder that intermittent electronic issues often point directly to the main computer.
Is Your 2001-2002 GMC 3500 PCM Failing?
A failing powertrain control module can manifest in numerous ways. If you’re experiencing any of the following symptoms, a faulty PCM is a likely culprit. Replacing it with a correctly programmed unit is often the most direct path to a lasting repair.
- ✔ Check Engine Light (CEL) is illuminated with communication-related codes (e.g., U-codes) or multiple random sensor codes.
- ✔ The engine cranks but refuses to start, or experiences intermittent no-start conditions.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stumbling, stalling, or misfiring.
- ✔ Failure to pass an emissions test.
- ✔ The cooling fans run constantly or not at all.
The Importance of VIN Programming
You cannot simply take a PCM from another truck and install it in yours. Each module is programmed with specific data for the vehicle’s engine, transmission, axle ratio, tire size, and options package. Our process eliminates this complexity. By providing your VIN at checkout, you receive a module that is a perfect electronic match for your vehicle’s original configuration. We flash it with the latest GM-certified calibrations, which often resolve issues the original software may have had. This is a critical step for proper vehicle function.
This module is a direct replacement for multiple service numbers, ensuring wide compatibility. It is compatible with part numbers: 12200411, 12201281, 12576160, and 52369718. Please verify your original part number or contact us for fitment confirmation.
Please Note: After installation, you will need to perform a security relearn procedure (often called a Passlock or VATS relearn) and a Crankshaft Variation Relearn (CASE relearn). The security relearn can often be done without special tools, but the CASE relearn requires a capable bi-directional scan tool. This is a necessary step to prevent misfire codes and ensure the engine runs smoothly.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. This PCM comes pre-programmed to your vehicle’s specific VIN. Simply provide us with your 17-digit VIN during or after checkout, and we will flash the module with the latest GM software before shipping.
What is a CASE relearn and is it required?
A CASE (Crankshaft Angle Sensor Error) relearn synchronizes the new PCM with the crankshaft position sensor. It is required after replacement to prevent a P1336 trouble code and ensure accurate misfire detection. This procedure must be performed with a compatible professional-grade scan tool.
Where is the PCM located on my 2001-2002 GMC 3500?
On most 2001-2002 GMC and Chevy full-size trucks, the PCM is located in the engine bay on the driver’s side, under the battery tray. You will need to remove the battery to access it.
What happens if I don’t do the security relearn?
If the security relearn procedure is not completed after installation, the vehicle’s anti-theft system will activate, and the engine will not start. This is a critical step for the vehicle to accept the new module.
Is this compatible with my Chevy Silverado 3500?
Yes, this PCM is compatible with a wide range of 2001-2002 GM trucks and SUVs, including the Chevrolet Silverado 3500 with a gasoline engine. Please refer to the full compatibility list on the product page to confirm your specific model.