Restore Peak Performance to Your Buick Enclave
Is your 2008 Buick Enclave giving you headaches? Unexplained stalling, a persistent check engine light, or erratic engine behavior can be incredibly frustrating. As a technician with over 20 years of experience under the hood, I’ve seen these exact issues countless times. More often than not, the culprit is a failing Engine Control Module (ECM)—the central computer that manages your vehicle’s performance. This isn’t just an inconvenience; a faulty ECM can lead to poor fuel economy, failed emissions tests, and even leave you stranded. Stop guessing and replace the core of your engine’s management system with a reliable, pre-programmed solution.
This isn’t just a part in a box. This is a complete, ready-to-install solution for your vehicle. We take a high-quality replacement ECM, part number 12602044, and professionally program it to your vehicle’s specific Vehicle Identification Number (VIN). This process loads the latest, most stable software updates from GM, ensuring your vehicle operates exactly as the manufacturer intended. By handling the programming before we ship, we save you a trip to the dealership and the hundreds of dollars they charge for this essential service. You get a part that is truly plug-and-play, designed to get you back on the road with confidence.
Case Study: A Tricky Diagnosis
I remember a 2008 Acadia (which shares the same platform and ECM as the Enclave) that came into the shop with a bizarre problem. The owner complained of intermittent power loss and the traction control light flashing for no reason, but with no consistent check engine codes. We checked the wheel speed sensors and wiring, which all tested fine. After hours of diagnostics, we hooked up a scope to the CAN bus network and noticed signal noise every time the engine warmed up. It turned out the ECM’s internal processor was failing under heat, corrupting communication with the other modules. A new, properly programmed ECM like this one solved the problem instantly. It’s a perfect example of how a failing 2008 Enclave engine control module can cause symptoms that seem completely unrelated.
Common Signs of a Failing ECM
- ✔ Check Engine Light is on with communication codes (like U0100) or internal processor fault codes (P0601, P0606).
- ✔ Engine cranks but refuses to start.
- ✔ Noticeable drop in fuel efficiency.
- ✔ Rough or unpredictable idling and stalling.
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Automatic transmission shifting issues.
- ✔ Failure to pass state emissions testing.
DIY Installation: A Straightforward Guide
Replacing the 2008 Enclave engine control module is a task a confident DIYer can handle. In the Enclave, it’s typically located behind the fan shroud. Always consult a repair manual for your specific vehicle’s location and torque specs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all modules to power down completely.
- Locate the ECM: On the 2008 Enclave, find the module mounted behind the cooling fan shroud. On other vehicles, it may be on the firewall or side of the engine bay.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new unit.
- Install the New Module: Mount your new, pre-programmed ECM and securely tighten the bolts. Re-attach the wiring harness connectors, ensuring they click firmly into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple key-cycle security relearn procedure to recognize the new ECM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions will be included with your part.
Verified Vehicle Compatibility
This module, part number 12602044, is a direct replacement for a wide range of GM vehicles. It is interchangeable with service numbers 12590032, 12603530, 12605843, 12607096, 12630457, and 19210737. Please verify your vehicle’s specific options below to ensure a perfect match. Providing your VIN at checkout is required for programming and guarantees compatibility for your 2008 Enclave engine control module and other listed vehicles.
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
ALLURE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
COLORADO 08 Electronic Control Module; (RH firewall)
CTS 06 Electronic Control Module; (RH engine compartment), V-Series, ID 12603530
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
DTS 06, 08 Electronic Control Module
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 19210737 or 12607096
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12607096, 19210737, or 12636660
ENVOY 09 Electronic Control Module; (LH engine), 4.2L
G6 06 Electronic Control Module; (LH front engine compartment), ID 12603530
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12590032, 12602044, 12603530, 12605843, 12607096, or 12618163
G6 08 Electronic Control Module; (LH front engine compartment), 3.6L
G6 09 Electronic Control Module; (LH front engine compartment), 3.6L, ID 19210737 or 12607096
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
HUMMER H3 08 Electronic Control Module; (RH firewall)
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
ION 06 Electronic Control Module; 2.4L (opt LE5)
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 19210737 or 12607096
ISUZU I-290 08 Electronic Control Module; (RH firewall)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
LUCERNE 06 Electronic Control Module; (lower part of air cleaner box), 4.6L
LUCERNE 08 Electronic Control Module; (lower part of air cleaner box), 4.6L, ID 12607096 or 19210737
MALIBU 06 Electronic Control Module; 3.9L
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 2.4L, w/hybrid
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 3.6L
MALIBU 09 Electronic Control Module; 3.6L
MALIBU 09-10 Electronic Control Module; 2.4L, w/hybrid
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
MONTANA 06 Electronic Control Module; (LH engine compartment), (SV6), 3.9L
MONTANA 08-09 Electronic Control Module; (LH engine compartment)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
SAAB 9-7X 07 Electronic Control Module; (LH engine), 8 cylinder
SAAB 9-7X 08 Electronic Control Module; (LH engine), 5.3L or 6.0L
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
SRX 08 Electronic Control Module; (LH engine compartment), (4.6L)
STS 06 Electronic Control Module; (LH frame rail), 4.4L
STS 08 Electronic Control Module; (LH frame rail), 4.4L or 4.6L
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07 Electronic Control Module; (LH engine), 5.3L or 6.0L
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 12607096, 19210737, or 12636660
TRAILBLAZER 09 Electronic Control Module; (LH engine), 4.2L
UPLANDER 06 Electronic Control Module; (LH engine compartment), 3.9L
UPLANDER 08 Electronic Control Module; (LH engine compartment), (3.9L), ID 12607096 or 19210737
UPLANDER 09 Electronic Control Module; (LH engine compartment), (3.9L)
VUE 08 Electronic Control Module; 3.6L
VUE 08-09 Electronic Control Module; 2.4L, VIN Z (8th digit, opt LAT)
VUE 09 Electronic Control Module; 3.6L, VIN 7 (8th digit, opt LY7)
VUE 10 Electronic Control Module; 3.6L
XLR 06 Electronic Control Module; (RH front engine compartment), 4.4L
XLR 08, 09 Electronic Control Module; (RH front engine compartment), ID 12607096
Frequently Asked Questions
Why do you need my VIN?
Your VIN is essential for us to program the Engine Control Module with the correct software for your vehicle’s specific configuration, including engine, transmission, and emissions equipment. This ensures perfect compatibility and performance.
Is this part difficult to install?
For most DIYers with basic tools, this is a straightforward installation. The module is plug-and-play, but you must disconnect the battery and may need to perform a simple key-cycle security relearn procedure, which we provide instructions for.
Will I need to take my car to the dealer after installation?
No. Because we program the module with your VIN before shipping, you can skip the expensive trip to the dealership for programming. This is a complete, ready-to-install solution.
What if my original part number is different?
This ECM is a direct replacement for several service numbers, including 12590032, 12603530, and others listed in the compatibility section. As long as your vehicle is on the list, this module will work perfectly once programmed.