Is Your Truck or SUV Running Rough? Get Back to Dependable Performance.
If you’re dealing with a frustrating check engine light, erratic engine behavior, or transmission shifting problems in your GM truck or SUV, a failing Powertrain Control Module (PCM) is often the culprit. Your vehicle is more than just transportation; it’s a tool for your job, a hauler for your family, and a partner for your adventures. This pre-programmed PCM is the definitive solution to restore the reliable, smooth operation you depend on every single day.
Common Symptoms & Your Solution
A faulty PCM can cause a wide range of issues that can leave you stranded. By replacing your old module with this professionally programmed unit, you can solve problems like:
- Persistent Check Engine Light (CEL)
- Error codes related to internal module failure (e.g., P0601, P0602, P0606)
- Harsh or unpredictable transmission shifting
- Engine stalling, sputtering, or random misfires
- No-start or hard-start conditions
- Poor fuel economy and loss of power
This isn’t just a replacement part; it’s a complete solution. We program this 2003-2006 Tahoe 89017750 PCM with the latest GM software updates using your vehicle’s specific VIN. This ensures perfect communication between your engine, transmission, and other systems, restoring performance to factory standards.
Features & Benefits
- ✔ Programmed to Your VIN: Arrives ready for installation, flashed specifically for your vehicle to ensure compatibility and performance.
- ✔ Latest GM Software Updates: Programmed with the newest calibrations from General Motors, often improving upon the original factory software for better efficiency and reliability.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for the original module, making the swap straightforward. It directly replaces service numbers 89017750, 12582605, 12589463, 12602802, and more.
- ✔ Restores Peak Operation: Eliminates frustrating drivability issues, smooths out shifting, and helps recover lost fuel economy and power.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: Why a Programmed Replacement Matters
As a technician, I’ve seen countless drivers chase symptoms all over their vehicle, replacing sensors and spark plugs, only to find the core issue was the PCM. These modules live in a harsh environment, subject to constant heat cycles and vibration. Over time, internal connections can fail. Simply grabbing a used unit from a salvage yard is a gamble—it won’t have your vehicle’s VIN, security information, or option content. Our process of programming this 2003-2006 Tahoe 89017750 PCM to your specific VIN before shipping takes the guesswork out of the repair, providing a reliable, long-term fix that gets you back on the road without the headache.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure (also known as a CASE relearn or anti-theft relearn) after installation. This procedure syncs the new PCM with your vehicle’s keys and anti-theft system. It is a simple process that can often be done without special tools and instructions can be readily found online for your specific model.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. Please double-check your VIN for accuracy to ensure a perfect match.
Will this fix my specific check engine light codes?
This PCM is a direct solution for codes related to internal module failure, such as P0601 through P0606. It can also resolve other codes that are triggered by incorrect data from a faulty computer. However, it’s always best to diagnose your vehicle properly to ensure the PCM is the root cause of the issue.
Is this part difficult to install?
The physical installation is typically straightforward for someone with basic mechanical skills. The PCM is usually located in the engine bay (often under the battery or next to the airbox) and is held in place by a few bolts and electrical connectors. The most critical step after the physical swap is the security relearn procedure.
What if my original part number isn’t 89017750?
This module is a compatible replacement for a wide range of GM service numbers, including 12582605, 12589463, and 12602802, among others. Please check the detailed fitment list on this page to confirm compatibility with your vehicle and original service number.