Restore Peak Performance to Your Hummer H2
Is your 2003-2007 Hummer H2, or another compatible GM truck, 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 central computer responsible for managing your vehicle’s engine and transmission. Don’t let a faulty module keep your powerful truck off the road. This replacement PCM, part number 89017750, is the definitive solution to restore your vehicle’s factory performance and reliability.
This isn’t just a replacement part; it’s a fully prepared, plug-and-play solution. Upon purchase, we will flash the module with the latest official GM software updates, specifically programmed to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures seamless communication between the new PCM and all other systems in your truck, eliminating the need for expensive dealership programming. You get a component that is ready for installation right out of the box, saving you time, money, and hassle.
From the Diagnostic Bay
We had a 2005 GMC Sierra 2500 with the 6.0L come in that was driving the owner crazy. The truck would randomly stall at stoplights and had a check engine light for an oxygen sensor circuit that wouldn’t go away, even after replacing the sensor twice. The parts cannon had been fired, but the problem persisted. After hooking up our diagnostic tools, we noticed erratic data coming from the PCM itself. The internal processor was failing, causing it to send faulty commands and misinterpret sensor readings. We installed one of our VIN-programmed PCMs, performed the quick security relearn, and the truck ran perfectly. The check engine light was gone for good, and the stalling issue was completely resolved. It’s a reminder that sometimes the root cause lies with the brain, not the sensors it’s reading.
Is Your Truck Showing Signs of a Failing PCM?
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The engine cranks but refuses to start.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
The Importance of a Properly Programmed 2003-2007 Hummer H2 PCM
The PCM in your GM truck is more than just a simple component; it’s the master controller for the entire powertrain. It takes in data from dozens of sensors—like the crankshaft position sensor, oxygen sensors, and throttle position sensor—and uses that information to make millions of calculations per second. These calculations control fuel injection timing, ignition spark, transmission shift points, and emissions systems. When a PCM fails, this entire symphony of operations falls apart, leading to the symptoms you’re likely experiencing. Our VIN-specific programming ensures that your new 2003-2007 Hummer H2 PCM has the exact software calibration your vehicle was designed with, accounting for its specific engine, transmission, and emissions equipment.
Simple Process, Lasting Solution
- ✔ Place Your Order: Add this PCM to your cart and complete the checkout process.
- ✔ Provide Your VIN: After your purchase, reply to your order confirmation email with your vehicle’s 17-digit VIN.
This module is a direct replacement for multiple service numbers, including: 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide array of GM trucks and SUVs from 2003 to 2007, such as the Cadillac Escalade, Chevy Avalanche, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, and more. Please verify the compatibility list to ensure this is the correct part for your vehicle.
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide us with your vehicle’s VIN, and we will flash the module with the correct, updated software from GM. This makes the installation process much simpler.
What is a security relearn procedure?
This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle three times. Instructions are readily available online and it requires no special tools.
Where is the PCM located on my Hummer H2 or GM truck?
On most compatible models, including the Hummer H2, Silverado, and Sierra, the PCM is located in the engine bay on the driver’s side, under or next to the battery tray.
How do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem first, as other failing components like sensors or wiring can also trigger a check engine light.
Is this compatible with my 2004 Chevy Silverado 1500?
Yes, this PCM is compatible with a wide range of GM trucks and SUVs. Please review the detailed fitment list on this page to confirm it matches your specific year, make, model, and engine size. This module replaces service ID 12602802, which is common for that model.