Get Your GM Truck Back on the Road with Confidence
Is your Escalade, Silverado, or Sierra suffering from frustrating issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer sideline your powerful truck. This direct-fit PCM is the definitive solution, arriving at your door fully programmed to your specific vehicle for a hassle-free installation.
Common Symptoms of a Failing GM PCM & Your Solution
A failing engine computer can cause a wide range of confusing problems. If you’re experiencing any of the following, a replacement module is the most likely fix:
- Persistent Check Engine Light (CEL) with codes like P0601, P0602, or P0606
- Engine stalling, stumbling, or misfiring
- Harsh or unpredictable automatic transmission shifting
- Noticeable decrease in fuel mileage
- Failure to pass emissions testing
- Complete no-start or intermittent starting issues
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine OEM-spec module and flash it with the latest official GM software updates using your vehicle’s unique VIN. This process ensures that your new 2003-2006 Escalade EXT PCM 89017734 will function exactly as the factory intended, restoring lost performance and reliability without a trip to the dealer.
Features & Benefits
- âś” VIN-Specific Programming: We program this module to your truck’s exact VIN before shipping. This ensures perfect communication with all onboard systems for a true plug-and-play experience.
- âś” Restored Performance & Efficiency: With the latest GM software, you can expect a return to factory-spec engine power, smooth transmission operation, and optimal fuel economy.
- âś” Simple, DIY-Friendly Installation: Designed for a straightforward swap. In most cases, you can have your vehicle running perfectly in under an hour with basic hand tools.
- âś” Broad GM Compatibility: This unit is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, and 89017734, making it a versatile fix for dozens of GM trucks and SUVs.
- âś” One-Year Replacement Coverage: This unit is backed by our one-year replacement warranty. Drive with the assurance that your investment is protected.
A Mechanic’s Note on PCM Replacement
As a tech with over 20 years of diagnostic experience, I’ve seen countless hours and dollars wasted chasing issues caused by a bad PCM. Drivers replace sensors, plugs, and coils, but the root problem remains. A failing computer can send out false signals, making diagnosis a nightmare. That’s why a pre-programmed unit like this 2003-2006 Escalade EXT PCM 89017734 is the professional’s choice. It eliminates the most complex variable—the software—and ensures the new ‘brain’ has the correct operational data from day one. It’s the most reliable way to solve these complex electronic problems and get your truck running right.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit Vehicle Identification Number (VIN). You can also add it as a note during checkout. We cannot program and ship the module without it.
Is this really a plug-and-play part?
Yes. Because we program the PCM to your VIN, it is ready to install and function immediately. In some specific GM vehicles, a simple security relearn procedure (often called a ‘CASE relearn’) may be needed, which takes about 15-30 minutes and does not require any special tools. We include easy-to-follow instructions for this process.
My original PCM has a different service number. Will this work?
Yes. This module is the correct hardware replacement for a range of service numbers, including 89017750, 12582605, and 12589463. As long as your vehicle’s year, make, and model are on our compatibility list, this is the correct part for your application.
Where is the PCM located on my vehicle?
On most compatible GM trucks and SUVs like the Escalade, Silverado, and Tahoe, the PCM is located in the engine bay on the driver’s side, typically mounted next to or under the battery tray in a black plastic housing.
Do I need to send my old part back?
No. There is no core charge or requirement to return your old, faulty module. You can keep it or dispose of it at your convenience.
What if I need help during installation?
We’re here to assist you. Your purchase of a 2003-2006 Escalade EXT PCM 89017734 includes our technical support. If you have any questions, please contact us. This unit is backed by our one-year replacement warranty.