If you’re dealing with a frustrating no-start condition, a persistent check engine light, or erratic engine behavior in your 2007 GMC Sierra Denali, the Engine Control Module (ECM) is a likely culprit. As the brain of your truck’s engine, a failing ECM can cause a cascade of problems that are often misdiagnosed. I’ve spent countless hours in the shop tracing phantom electrical issues back to a faulty module. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s performance and reliability.
This ECM, part number 19210738, arrives at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN). We handle the complex part by flashing it with the latest, most stable software updates directly from GM. This means you can bypass the expensive trip to the dealership for programming. You get a component that’s ready for installation, designed to restore factory-level fuel efficiency, smooth shifting, and proper engine timing.
A Technician’s Notebook
I remember a 2007 Sierra Denali that came into the bay with a complaint of intermittent stalling at stoplights and a random P0606 (ECM/PCM Processor Fault) code that would come and go. The owner had already replaced the throttle body and a few sensors with no luck. We hooked up our scope and monitored the 5-volt reference circuits from the ECM. We noticed tiny, erratic voltage drops that weren’t enough to set a specific sensor code but were just enough to confuse the processor. After confirming stable power and ground to the module, we knew the issue was internal. Swapping in a pre-programmed 2007 Sierra Denali ECM like this one solved the problem instantly. The truck ran perfectly, and the P0606 never returned. It’s a classic case where shotgunning parts costs more than a proper diagnosis and the right component.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light (CEL) is illuminated with codes like P0601, P0606, or U0100.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drop in fuel mileage.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Automatic transmission shifts harshly or at the wrong times.
- ✔ Loss of communication with your scan tool.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for a DIYer with basic tools. Because we program it beforehand, you eliminate the most difficult step. Here’s a general guide for your Sierra Denali:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the 2007 Sierra Denali, the ECM is typically found in the left-hand (driver’s side) front of the engine compartment. It’s often mounted near the battery or air filter housing.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harnesses from the old ECM. These connectors have locking tabs, so be gentle to avoid breaking them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a Passlock or anti-theft relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows your vehicle’s security system to recognize the new ECM. After this, your truck should start and run correctly.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12589297, 12597121, 12603892, and 19210738 and fits a wide range of GM vehicles. Please confirm your model and location below:
ESCALADE 07 (LH front under battery)
ESCALADE ESV 07 (LH front under battery)
ESCALADE EXT 07 (LH front under battery)
Chevrolet:
AVALANCHE 1500 07 (LH front under battery)
CORVETTE 06-07 (RH engine compartment)
EQUINOX 07 (LH engine compartment)
IMPALA 07 (lower air cleaner box, 3.5L/3.9L)
MALIBU 07 (3.5L/3.9L)
MONTE CARLO 07 (lower air cleaner box, 3.5L/3.9L)
SILVERADO 1500 PICKUP 07 (new style, LH front under battery, w/o 4.3L)
SILVERADO 2500/3500 PICKUP 07 (new style, LH front under battery, 6.0L)
SUBURBAN 1500/2500 07 (LH front under battery)
TAHOE 07 (LH front under battery)
GMC:
SIERRA 1500 PICKUP 07 (new style, LH front under battery, w/o 4.3L)
SIERRA 2500/3500 PICKUP 07 (new style, LH front under battery, 6.0L)
SIERRA DENALI 07 (new style, LH front engine compartment)
YUKON / YUKON XL 1500 / YUKON XL 2500 07 (LH front under battery)
Hummer:
HUMMER H2 07 (LH front under battery)
Pontiac:
G6 07 (LH front engine compartment, 3.5L/3.9L)
G8 08 (6.0L)
TORRENT 07 (LH engine compartment)
Saturn:
AURA 07 (RH firewall, 3.5L)
Frequently Asked Questions
What do you mean by ‘programmed to my VIN’?
When you provide your Vehicle Identification Number (VIN) during checkout, we use it to load the exact GM-specified software for your truck’s engine, transmission, and options. This ensures the module works correctly right out of the box, without needing a trip to the dealer for expensive programming.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set will be sufficient for removing the mounting bolts and disconnecting the battery. The most important part is the security relearn procedure, which only requires the use of your ignition key.
Will this fix my check engine light?
If the check engine light is on due to an internal ECM failure (common codes P0601, P0606) or a fault the ECM is causing, then yes, this will resolve the issue. It’s always best to have the codes read first to confirm the diagnosis, but a faulty ECM is a very common cause.
Is this a new or used part?
This is a high-quality, tested component that has been inspected and prepared for service. We flash it with new GM software to ensure it functions to the latest specifications, providing a reliable and cost-effective solution.
What happens if I don’t provide my VIN?
Providing your VIN is a required step for this purchase. We cannot ship the module without programming it first, as an unprogrammed module will not start or run your vehicle. This service is included to guarantee a successful repair for you.