Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Escalade, or Tahoe suffering from baffling electrical issues, poor performance, or a persistent check engine light? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. This vital component manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it begins to fail, it can create a cascade of problems that are difficult to diagnose. This replacement PCM, part number 89017734, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We had a 2005 GMC Sierra 2500 in the shop that was a real head-scratcher. The owner had replaced the throttle body, MAF sensor, and multiple O2 sensors chasing an intermittent stalling issue and a host of seemingly unrelated trouble codes. The truck would run fine for days, then suddenly die at a stoplight. After hours of diagnostics, we traced the issue to a failing driver circuit inside the original PCM. The module was intermittently cutting power to the fuel pump relay. Installing a correctly programmed PCM like this one solved the problem instantly, saving the customer from further expensive and unnecessary parts replacements.
Is Your Vehicle Exhibiting These Symptoms?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs replacement:
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, stumbling, or running rough for no apparent reason.
- ✔ Harsh, erratic, or delayed transmission shifting.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy and overall engine power.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
- ✔ Failure to pass state emissions inspections.
The Right Fix: A Pre-Programmed 2003-2007 GM PCM
Don’t settle for a generic, unprogrammed module that will require an expensive trip to the dealership. We take the guesswork and hassle out of the repair. When you order from us, we flash this PCM with the latest, most stable GM-certified software specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. This ensures that the module communicates perfectly with your truck’s engine, transmission, and all other onboard systems right out of the box. This module is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, and 28042802.
Installation is straightforward for the DIY mechanic or any professional technician. On most compatible GM trucks and SUVs, the PCM is located on the driver’s side, mounted to the frame rail or inner fender, often underneath the battery tray. While the unit is plug-and-play from a programming standpoint, your vehicle will require a security relearn procedure after installation to sync the new PCM with your keys. This is a standard anti-theft measure and can typically be performed without special tools.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. This PCM comes fully programmed to your vehicle’s specific VIN. Please provide your VIN when you place your order, and we will handle all the software flashing before it ships.
What is a security relearn procedure?
This is a simple procedure required by your vehicle’s anti-theft system to recognize the new PCM. It usually involves a sequence of turning the key on and off for set periods. Instructions are widely available online for your specific model, or your mechanic can perform it in minutes.
Where is this module located on my vehicle?
On most GM trucks and SUVs from this era (like the Silverado, Tahoe, and Escalade), the PCM is found on the driver’s side of the engine bay, typically mounted on the frame rail below the battery and fuse box.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to have your vehicle properly diagnosed to ensure the PCM is the root cause of the problem.
Is this a genuine GM part?
This is a high-quality replacement part built to meet or exceed original equipment specifications. It is programmed with official GM software to ensure perfect functionality and compatibility with your vehicle.