Is Your 2006 HUMMER H3 Experiencing Frustrating Engine Problems?
If you’re dealing with a no-start condition, erratic shifting, a persistent Check Engine Light, or abysmal fuel economy, the problem often points directly to the heart of your vehicle’s electronics: the Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen countless GM vehicles, including the rugged H3, sidelined by a failing PCM. The symptoms can be confusing, often mimicking other component failures, which leads to wasted time and money on parts you don’t need.
The Technician’s Perspective on PCM Failure
A customer’s 2006 HUMMER H3 came into my shop last month with a classic case. It would crank but not start intermittently, and when it did run, it felt sluggish and threw a handful of communication-related diagnostic trouble codes (DTCs). After verifying good power and ground connections at the PCM connectors and checking the communication network, it was clear the module itself was the culprit. These P12 controllers, located on the right-hand firewall in the H3, are subjected to intense heat cycles and engine vibration, which can cause internal circuits and solder points to fail over time.
Simply swapping in a used module from a junkyard is not a solution. It won’t have the correct Vehicle Identification Number (VIN) or security information, and your H3 will remain a very expensive paperweight. This is where our service makes all the difference.
The Direct-Fit, Programmed Solution
This is a replacement Powertrain Control Module, specifically part number 12569773, which is a direct fit for your 2006 HUMMER H3. The most critical service we provide is programming it specifically to your vehicle before it ever leaves our facility. Hereโs what that means for you:
- VIN-Specific Programming: You provide us with your H3’s VIN, and we flash the module with the exact factory calibration for your truck.
- Latest GM Software Updates: We load the newest software from General Motors. This is a huge benefit, as these updates often correct drivability issues, improve transmission shift points, and fix bugs that were present in the original factory software.
- No Dealer Visit Needed: You avoid the hassle and high cost of having a dealership program a new module.
Expert Pro Tip: The Security Relearn Procedure
After installing your new PCM, you will need to perform a simple security relearn procedure. This allows the new module to communicate with your vehicle’s anti-theft system and ignition key. This procedure typically involves turning the key to the ‘ON’ position for 10-12 minutes, then off, and repeating the cycle three times. It requires no special tools and ensures your H3 will start and run correctly.
Guaranteed Compatibility
This module is a direct replacement for service number 12569773 and a wide range of other GM vehicles and part numbers. Please verify your vehicle is on the list below:
- HUMMER H3: 2006 (RH firewall)
- Chevrolet Colorado / GMC Canyon: 2004-2006 (RH firewall)
- Buick Rainier: 2006 (4.2L, LH engine)
- Chevrolet Trailblazer / Trailblazer EXT: 2006 (4.2L, LH engine)
- GMC Envoy / Envoy XL: 2006 (4.2L, LH engine)
- Isuzu Ascender: 2006 (4.2L, LH engine)
- Isuzu i-280 / i-350: 2006 (RH firewall)
- Saab 9-7X: 2006 (6 cylinder, LH engine)
This part replaces the following numbers: 12588650, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, 12604438, 12604439, 12606369, 12606373, 12606374, 12606398, 12606399, 19209820, 19209821.