Restore Peak Performance to Your GM Truck or SUV
Is your Yukon, Sierra, or Escalade running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These frustrating and often confusing issues frequently point to a failing Powertrain Control Module (PCM), the central computer of your vehicle. This replacement PCM is your direct, reliable solution to get your truck back to running the way it should. We take the guesswork and hassle out of the repair by programming the module specifically to your vehicle’s VIN before it ships. This means it arrives with the latest GM software updates, ensuring optimal performance and resolving common factory drivability concerns.
A Technician’s Notebook: The Intermittent No-Start Mystery
I had a 2005 Silverado 2500 in my bay that was giving the owner fits. It would start perfectly for a week, then refuse to crank for two days, with no rhyme or reason. The battery was new, the starter checked out, and there were no consistent trouble codes. After hours of chasing wires, I focused on the PCM. On these GM trucks, I’ve seen internal solder joints on the PCM board crack from years of heat cycles and vibration. This creates an intermittent connection that can disrupt the starter relay command or fuel pump operation. We installed a VIN-programmed PCM, and the truck has started reliably ever since. It’s a classic failure mode that a simple part swap can permanently fix.
Is Your GM Truck or SUV Showing These Signs?
A failing PCM can cause a wide range of problems that might seem unrelated. If you’re experiencing any of the following, your PCM is the likely culprit. This is especially true if you see diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or U0100.
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling or cutting out while driving
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Complete no-start or intermittent starting condition
- ✔ Poor fuel economy and reduced engine power
- ✔ Communication errors with diagnostic scan tools
- ✔ Inaccurate or non-functioning dashboard gauges
A Straightforward Guide to Installation
Replacing the PCM on these GM vehicles is a job most DIYers can handle in their own driveway. Our pre-programming service eliminates the need for expensive dealer tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, near the battery and air filter box.
- Disconnect the Connectors: Carefully lift the locking tabs and unplug the wiring harness connectors from the old PCM. There are typically two or three large connectors.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s usually held in by a few 10mm bolts.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely plug in the wiring harness connectors. Ensure the locking tabs click into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure. Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle three times. On the fourth try, the vehicle should start. This allows the PCM to sync with your vehicle’s anti-theft system.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It is confirmed to fit the following models:
Note: Please verify your specific engine and options against the detailed fitment list or contact us with your VIN to confirm compatibility. Some 2004 models require matching the ID number 12602802.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and we will flash the module with the latest GM software specific to your truck before shipping.
What is a security relearn?
It’s a simple, tool-free procedure that syncs the new PCM with your vehicle’s existing anti-theft system (PassLock/VATS). Without it, the vehicle will not start. The process involves cycling the ignition key and takes about 30 minutes, as detailed in the installation guide.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also controls transmission functions, including shift points and line pressure. If your hard shifting is caused by faulty PCM logic or a failing driver circuit, this replacement module will resolve it.
Where is my VIN located?
Your 17-digit Vehicle Identification Number (VIN) can be found on your driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a brand new part?
This is a high-quality, tested replacement part that has been verified to meet or exceed original equipment specifications. It is programmed with new GM software to ensure reliability and performance.