Restore Your Vehicle’s Core Performance and Reliability
If you’re dealing with frustrating and unpredictable engine problems in your 2007-2009 GMC Envoy, a failing Engine Control Module (ECM) is often the culprit. As the central computer of your vehicle, a faulty ECM can cause a cascade of issues, from a simple check engine light to a car that won’t start at all. I’ve spent over two decades in the garage, and I’ve seen firsthand how a malfunctioning module can mimic a dozen other problems, leading to wasted time and money on unnecessary repairs. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s drivability and peace of mind.
This ECM, part number 12602044, arrives at your door fully programmed with the latest GM software updates, specifically flashed to your vehicle’s unique VIN. This critical step means you can skip the expensive trip to the dealership for programming. We handle the complex part, so you get a true plug-and-play solution. By providing us with your VIN upon purchase, you ensure that this module will communicate flawlessly with your vehicle’s other systems, just as the original did.
Case Study: A Tricky Diagnosis
I once had a 2008 Envoy in my bay with an intermittent no-start condition that was driving the owner crazy. They had already replaced the battery, starter, and fuel pump with no luck. The vehicle would run fine for days, then suddenly refuse to crank. No communication codes were stored initially, just a frustrating silence. After careful diagnostic tracing, we found that the 5-volt reference signal from the ECM was dropping out randomly when the module got hot. This is a classic internal failure that a basic scan tool won’t always catch. Installing a properly programmed 2007-2009 Envoy Engine Module like this one solved the problem instantly, saving the customer from further guesswork and costly repairs.
Is Your Vehicle Showing These Signs of ECM Failure?
A failing engine computer can manifest in many ways. If you’re experiencing any of the following, it might be time for a replacement:
- ✔ Check Engine Light is on with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ Engine stalls, misfires, or runs rough for no apparent reason.
- ✔ The vehicle won’t start, or it starts intermittently.
- ✔ Noticeable decrease in fuel economy.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Issues with other electronic systems that rely on ECM data.
Your Straightforward Installation Guide
Installing your new 2007-2009 Envoy Engine Module is a manageable job for a confident DIYer. Follow these steps for a smooth installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On most 2007-2009 Envoys, the ECM is located on the driver’s side of the engine compartment, mounted to the inner fender or near the air cleaner housing.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware holding the old ECM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors back into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): While we pre-program the unit, some vehicles may require a security or crank-relearn procedure. This can often be done without special tools by cycling the key. Consult a service manual for your specific vehicle if it doesn’t start immediately.
Verified Vehicle Compatibility
This module is a direct replacement for service number 12602044 and is also interchangeable with 12590032, 12603530, 12605843, 12607096, 12630457, and 19210737. It fits a wide range of GM vehicles. While we focus on the 2007-2009 Envoy Engine Module, please verify your part number and check the extensive list below to ensure perfect fitment for your specific model and engine option.
COLORADO 08 Electronic Control Module; (RH firewall)
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12607096
G6 09 Electronic Control Module; (LH front engine compartment), 3.6L, ID 19210737
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L
XLR 09 Electronic Control Module; (RH front engine compartment), ID 12607096
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
DTS 06 Electronic Control Module
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12605843
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
STS 06 Electronic Control Module; (LH frame rail), 4.4L
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 12636660
UPLANDER 09 Electronic Control Module; (LH engine compartment), (3.9L)
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 19210737
SAAB 9-7X 07 Electronic Control Module; (LH engine), 8 cylinder
TRAILBLAZER 07 Electronic Control Module; (LH engine), 5.3L
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 19210737
LUCERNE 08 Electronic Control Module; (lower part of air cleaner box), 4.6L, ID 12607096
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 12607096
CTS 06 Electronic Control Module; (RH engine compartment), V-Series, ID 12603530
STS 08 Electronic Control Module; (LH frame rail), 4.6L
G6 06 Electronic Control Module; (LH front engine compartment), ID 12603530
G6 08 Electronic Control Module; (LH front engine compartment), 3.6L
ION 06 Electronic Control Module; 2.4L (opt LE5)
MALIBU 06 Electronic Control Module; 3.9L
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 2.4L, w/hybrid
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
VUE 08-09 Electronic Control Module; 2.4L, VIN Z (8th digit, opt LAT)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
VUE 08 Electronic Control Module; 3.6L
VUE 09 Electronic Control Module; 3.6L, VIN 7 (8th digit, opt LY7)
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096 (ECM)
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 19210737
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12603530
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
STS 08 Electronic Control Module; (LH frame rail), 4.4L
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12590032
ISUZU I-290 08 Electronic Control Module; (RH firewall)
LUCERNE 06 Electronic Control Module; (lower part of air cleaner box), 4.6L
MALIBU 09-10 Electronic Control Module; 2.4L, w/hybrid
UPLANDER 08 Electronic Control Module; (LH engine compartment), (3.9L), ID 19210737
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
MONTANA 06 Electronic Control Module; (LH engine compartment), (SV6), 3.9L
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 19210737
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12636660
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12602044
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 12607096
TRAILBLAZER 09 Electronic Control Module; (LH engine), 4.2L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
MALIBU 09 Electronic Control Module; 3.6L
SRX 08 Electronic Control Module; (LH engine compartment), (4.6L)
SAAB 9-7X 08 Electronic Control Module; (LH engine), 5.3L
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 12607096
G6 09 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12607096
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
XLR 06 Electronic Control Module; (RH front engine compartment), 4.4L
XLR 08 Electronic Control Module; (RH front engine compartment)
ENVOY 09 Electronic Control Module; (LH engine), 4.2L
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12607096
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12618163
LUCERNE 08 Electronic Control Module; (lower part of aircleaner box), 4.6L, ID 19210737
MONTANA 08-09 Electronic Control Module; (LH engine compartment)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
VUE 10 Electronic Control Module; 3.6L
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
DTS 08 Electronic Control Module
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07 Electronic Control Module; (LH engine), 6.0L
SAAB 9-7X 08 Electronic Control Module; (LH engine), 6.0L
HUMMER H3 08 Electronic Control Module; (RH firewall)
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 3.6L
UPLANDER 08 Electronic Control Module; (LH engine compartment), (3.9L), ID 12607096
UPLANDER 06 Electronic Control Module; (LH engine compartment), 3.9L
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We flash the module with the latest GM software using the VIN you provide during checkout. This makes it a plug-and-play installation, saving you hundreds in dealership fees.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (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.
Is this a new or used part?
This is a high-quality, tested, and verified used OEM part. Each module is inspected and programmed by our expert technicians to ensure it meets or exceeds original factory specifications for performance and reliability.
What if my original part number is different?
This module is a direct replacement for several service numbers, including 12590032, 12603530, and others listed in our compatibility section. As long as your original part number is on our interchange list, this module will work for your vehicle.
What happens after I install it?
After installation, your vehicle should start and run correctly. In some rare cases, a security relearn procedure may be required, which typically involves cycling the ignition key and can be done without special tools. This restores communication between the ECM and your vehicle’s anti-theft system.