Is Your GM Truck or SUV Acting Up?
If you’re dealing with a frustrating no-start condition, erratic engine behavior, or a check engine light that won’t go away, a failing Powertrain Control Module (PCM) is often the culprit. As the brain of your vehicle, when the PCM starts to fail, it can cause a cascade of confusing problems. I’ve spent two decades under the hoods of these trucks, and I’ve seen how a faulty module can mimic a dozen other issues, costing you time and money on unnecessary parts.
“A customer’s 2005 Sierra 2500 with the 6.0L came in last week with these exact symptoms. It would randomly stall at red lights and sometimes refuse to restart for 10-15 minutes. The scan tool showed a P0601 internal memory error, a dead giveaway. We swapped in a VIN-programmed PCM like this one, and the truck has been running perfectly ever since. It’s a common failure point on this platform.”
The Direct Solution for Common PCM Failures
This isn’t just a generic part off a shelf. This is a direct-fit replacement Electronic Control Module, service part number 12589463, that we program specifically for your vehicle using your VIN. This critical step ensures all systems, from the engine and transmission to the anti-theft system, communicate correctly right out of the box. Stop chasing phantom sensor codes and get to the root of the problem.
- โ Fixes No-Start & Stalling: Restores reliable ignition and fuel control signals.
- โ Eliminates False Trouble Codes: Solves internal module faults that trigger confusing check engine lights.
- โ Corrects Poor Drivability: Addresses issues like harsh shifting, poor fuel economy, and hesitation.
- โ VIN-Programmed for Your Vehicle: We flash the module with the latest GM-certified software for your specific truck or SUV. No expensive dealer trip is needed for programming.
- โ Plug-and-Play Installation: Once you receive it, the installation is a straightforward swap.
Simple Installation for Your 2003-2007 Sierra 3500 PCM
You don’t need to be a master mechanic to replace this module. With basic hand tools, you can get your truck back on the road in under an hour. Most of these vehicles have the PCM located in the engine bay, under the battery tray.
- Safety First: Disconnect the negative battery terminal and remove the battery.
- Access the Module: Unbolt and remove the battery tray to expose the PCM and its connectors.
- Swap the Connectors: Carefully release the locking tabs and disconnect the wiring harnesses from your old module. Connect them securely to your new, programmed PCM.
- Reassemble: Reinstall the battery tray and the battery, then reconnect the negative terminal.
- Final Check: Start the vehicle. A security relearn procedure may be required, which typically involves cycling the key and is simple to perform (instructions can be easily found for your model).
Expert Pro Tip: Before plugging in your new PCM, take a moment to inspect the connector pins on your vehicle’s wiring harness. Use a small brush and some electrical contact cleaner to remove any dirt or corrosion. A clean connection is critical for the long-term health and performance of the module.
Guaranteed Compatibility
This module is a direct replacement for service part numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify the part number on your original module. After your purchase, simply provide us with your VIN, and we’ll handle the rest, ensuring you receive a module that’s ready to restore your vehicle’s performance and reliability.