Is Your 2007 Hummer H3 Running Erratically? The Solution is Here.
If you’re dealing with a frustrating no-start condition, poor fuel mileage, a persistent check engine light, or other baffling electrical issues on your Hummer H3, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer, it manages everything from fuel injection and ignition timing to transmission shifting. When it fails, the symptoms can be widespread and confusing. This isn’t just a part; it’s the brain of your vehicle, and we provide a reliable, straightforward fix.
A Real-World Scenario from My Shop
A customer brought in their 2007 Hummer H3 last month with a strange combination of problems: a hard 1-2 shift, a random cylinder misfire code (P0300), and the radio cutting out intermittently. They had already replaced spark plugs and a coil pack with no success. After running diagnostics, I found communication errors between the PCM and the transmission module. We installed a VIN-programmed PCM like this one, and it immediately resolved all three issues. The root cause wasn’t three separate problems, but one failing computer creating chaos.
The Smart Choice: Pre-Programmed for Your H3
Forget about costly dealership visits and towing fees. We take the hassle out of PCM replacement. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable GM software specific to your 2007 Hummer H3. It arrives at your door ready for a direct, plug-and-play installation.
Common Symptoms of a Failing PCM:
- โ Check Engine Light is on with communication-related codes (U-codes) or internal processor failure codes (P0601-P0606).
- โ Vehicle will not start or stalls intermittently.
- โ Noticeable drop in fuel economy.
- โ Harsh or erratic automatic transmission shifting.
- โ Engine performance issues like misfiring, stumbling, or hesitation.
Plug-and-Play Installation: Get Back on the Road Fast
Installing your new 2007 Hummer H3 PCM is a job most DIYers can handle in under an hour with basic tools. No specialized programming equipment is needed.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On the 2007 Hummer H3, the PCM is typically located on the right-hand (passenger side) firewall in the engine bay.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage before proceeding.
- Remove Old Module: Unbolt the old PCM from its mounting bracket.
- Install New Module: Mount your new, pre-programmed PCM and securely reconnect the wiring harnesses.
- Reconnect Battery: Reattach the negative battery terminal. Your vehicle is now ready to start.
Guaranteed Fitment for Your Vehicle
This module, part number 12602010 (interchangeable with 19210067), is the correct fit for a wide range of GM vehicles. Please verify your vehicle is on this list:
- 2007 HUMMER H3 (RH firewall)
- 2007-2008 ISUZU ASCENDER (4.2L, LH engine)
- 2007 ISUZU I-370 / I-290 (RH firewall)
- 2007-2008 GMC ENVOY (4.2L, LH engine)
- 2007 CHEVROLET CANYON / COLORADO (RH firewall)
- 2007-2008 CHEVROLET TRAILBLAZER (4.2L, LH engine)
- 2007-2008 SAAB 9-7X (4.2L / 6-cylinder, LH engine)
- 2007 BUICK RAINIER (4.2L, LH engine)
Frequently Asked Questions (FAQ)
Q: Is this part difficult to install?
A: Not at all. Because we program it to your VIN, it’s a direct replacement. You just need basic hand tools to unbolt the old unit and install this one, making it a perfect job for a DIY mechanic.
Q: How do I provide my VIN?
A: After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information for programming.
Q: Will I need to have a dealer do anything after installation?
A: No. Our VIN programming handles all the necessary software setup. In most cases, you will not need to perform any additional security relearn procedures, saving you hundreds of dollars in dealer fees.
Q: What if I have a different engine than the ones listed?
A: This PCM is specifically for the models and engine configurations listed. If you have a different engine (e.g., the V8 in an H3 Alpha), this module will not be compatible. Please verify your vehicle’s details before ordering.
Q: What do the part numbers 12602010 and 19210067 mean?
A: These are GM part numbers for the same component. 19210067 is often a newer or superseding number for 12602010, but they are functionally identical for the applications listed.