Is Your Suburban 2500 Acting Up?
If you’re dealing with a no-start condition, erratic shifting, a check engine light that won’t go away, or poor fuel economy in your 2005-2006 Suburban 2500, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer for your engine and transmission, when the PCM starts to fail, it can cause a host of frustrating and hard-to-diagnose problems. You depend on your Suburban to be a reliable workhorse, and a faulty PCM can bring it to a dead stop.
Expert Pro Tip from 20+ Years on the Floor
Before you condemn your PCM, take a close look at the battery and its tray. On these GM trucks, the PCM is located right under the battery. I’ve seen countless cases where a leaking battery drips acid directly onto the PCM connectors and wiring harness, causing corrosion that mimics a failed module. Always disconnect the battery, remove it, and thoroughly clean and inspect the connectors with a good contact cleaner before replacing the PCM. This simple check can sometimes save you the cost of a new part.
The Direct-Fit, Programmed Solution
Forget expensive dealership visits and programming fees. This is a genuine GM Powertrain Control Module, part number 89017749, that arrives at your door completely programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest GM-certified software updates, ensuring optimal performance, fuel efficiency, and emissions control. It’s a true plug-and-play solution designed to get you back on the road with confidence.
Symptoms of a Failing 2005-2006 Suburban 2500 PCM:
- ✔ Check Engine Light (CEL) illuminated with communication codes (like U0100).
- ✔ Engine cranks but will not start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Noticeable drop in fuel economy.
- ✔ Stalling, rough idling, or engine misfires.
- ✔ Other warning lights on the dash appearing without reason.
Plug-and-Play Installation: No Dealer Visit Required
Installing your new PCM is a straightforward process you can do in your own driveway. All you need are basic hand tools. Here’s how simple it is:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On your Suburban 2500, it’s located under the battery tray on the driver’s side of the engine compartment.
- Access the Module: Remove the battery and the battery tray to gain clear access to the old PCM.
- Disconnect Harnesses: Carefully unclip the wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Swap the Modules: Unbolt the old PCM and install the new one in its place.
- Reconnect Everything: Securely plug the wiring harnesses into your new PCM and reinstall the battery tray and battery. Reconnect the negative battery terminal.
- Final Step: Your vehicle may require a security relearn procedure, which can typically be done without special tools. Instructions are readily available online or in your service manual.
This module is a direct replacement for part numbers 12589462, 12602801, and 89017749. While it fits a wide range of GM trucks and vans, this listing is specifically for the 2005-2006 Suburban 2500 with the 8.1L engine. By providing your VIN at checkout, you guarantee a perfectly matched and updated module for your exact vehicle.