Restore Peak Performance to Your GM Truck or SUV
If you’re dealing with frustrating and unpredictable engine problems in your 2007 HUMMER H3, a faulty Powertrain Control Module (PCM) is often the culprit. As the central computer of your vehicle, the PCM manages everything from fuel injection and ignition timing to transmission shifting. When it starts to fail, it can cause a cascade of issues that are difficult to diagnose. I’ve seen it countless times in my shop: a vehicle comes in with a persistent Check Engine Light, intermittent stalling, or a baffling no-start condition that has other mechanics stumped. More often than not, the PCM is the root cause.
This isn’t just a replacement part; it’s a complete solution. We take a genuine OEM PCM, part number 12602010 / 19210067, and professionally flash it with the very latest software updates from General Motors. By programming it directly to your vehicle’s unique VIN, we ensure it communicates perfectly with all other onboard modules right out of the box. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you significant time and money.
Case Study: A Tricky Diagnosis
A few months back, a 2007 Chevy Colorado was towed into my bay. The owner was frustrated; he’d replaced the fuel pump and crank sensor, but the truck still had an intermittent no-start and would occasionally stall at stoplights. No consistent codes were being stored, just a generic P0601 (Internal Control Module Memory Check Sum Error) that would pop up now and then. After verifying the wiring and power/ground circuits to the PCM, we determined the module itself was failing internally. Instead of sending him to the dealer for a pricey replacement and programming, we sourced a pre-flashed unit like this one. The installation took less than 30 minutes, and after a quick security relearn, the truck fired right up and has run flawlessly ever since. It’s a perfect example of how the right part can solve a complex problem efficiently.
Is Your Vehicle Showing These Symptoms?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, it might be time for a replacement:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) related to the PCM, such as P0601, P0606, or U0100
- ✔ Engine stalling or shutting off while driving
- ✔ Intermittent or complete no-start condition
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic transmission shifting
- ✔ Poor engine performance, including rough idling or hesitation
Why Choose a Pre-Programmed 2007 Hummer H3 PCM?
Getting your vehicle back to factory-spec operation is our top priority. This module is the definitive fix for a faulty computer, providing updated software that can resolve inherent drivability issues you might not even know were software-related. It’s a reliable, cost-effective alternative to dealership service departments.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- ✔ Locate the PCM: On the 2007 Hummer H3 and similar trucks (Canyon/Colorado), the PCM is typically located on the right-hand (passenger side) firewall in the engine bay. On Trailblazer/Envoy platforms, it’s on the left-hand side of the engine.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old PCM. Inspect them for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely tighten the bolts.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new PCM, ensuring they click into place. Reconnect the negative battery terminal.
- ✔ Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a ‘key-on’ relearn) to sync the new PCM with your vehicle’s anti-theft system. This typically takes about 30 minutes and requires no special tools. Instructions are readily available online for your specific model.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the following vehicles equipped with the specified engine options. Please match your part number (12602010 or 19210067) for guaranteed compatibility.
- BUICK RAINIER: 2007 (4.2L, LH engine)
- CHEVROLET CANYON: 2007 (RH firewall)
- CHEVROLET COLORADO: 2007 (RH firewall)
- CHEVROLET TRAILBLAZER: 2007 (4.2L, LH engine), 2008 (4.2L, LH engine, ID 19210067)
- GMC ENVOY: 2007 (4.2L, LH engine), 2008 (4.2L, LH engine, ID 19210067)
- HUMMER H3: 2007 (RH firewall)
- ISUZU ASCENDER: 2007 (4.2L, LH engine), 2008 (4.2L, LH engine, ID 19210067)
- ISUZU I-290: 2007 (RH firewall)
- ISUZU I-370: 2007 (RH firewall)
- SAAB 9-7X: 2007 (6 cylinder, LH engine), 2008 (4.2L, LH engine)
Frequently Asked Questions About the 2007 Hummer H3 PCM
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive this information, as the programming is essential for it to function in your vehicle.
Is this part difficult to install for a DIYer?
Not at all. The physical replacement is straightforward, involving just a few bolts and electrical connectors. The only additional step is the security relearn procedure, which can be done in your driveway with just the ignition key and about 30 minutes of time. It’s one of the easier module replacements.
Will I need to do anything else after installation?
After the security relearn is complete, the vehicle should start and run normally. In some cases, a Crankshaft Position System Variation (CASE) relearn may be needed to clear a P1336 code, which requires a capable scan tool. However, many vehicles do not require this step for normal operation.
What if my part number is slightly different?
This module, 12602010, also serves as a direct replacement for part number 19210067. If your original module has either of these numbers, this part is correct for your vehicle, provided it matches the application list.
Is there a core charge for my old PCM?
No, there is no core charge or need to return your old, non-functioning module. You can keep it or dispose of it responsibly.