Restore Your Minivan’s Reliability and Performance
If your 2006 Buick Terraza is suffering from perplexing issues like a persistent check engine light, erratic engine behavior, or a frustrating no-start condition, the root cause is often a failing Engine Control Module (ECM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can wreak havoc on a vehicle’s entire system. It’s the brain of your engine, and when it malfunctions, nothing works as it should. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This is the dependable, straightforward solution you need.
This isn’t just a replacement part; it’s a complete fix. We take a high-quality ECM, part number 12607096, and flash it with the very latest GM-certified software, programmed specifically to your vehicle’s unique VIN. This critical step ensures perfect compatibility with your Terraza’s engine, transmission, and anti-theft systems, eliminating the need for an expensive trip to the dealership for programming. You get a component that’s ready to install right out of the box, restoring the precise fuel delivery, ignition timing, and emissions control your vehicle had when it was new.
Is Your Terraza Showing These Signs of ECM Failure?
A failing ECM can manifest in numerous ways. From my experience in the diagnostic bay, these are the most common symptoms I’ve traced back to a bad engine computer. If you’re experiencing any of these, a replacement 2006 Terraza Engine Control Module is the likely solution.
- ✔ Persistent Check Engine Light (CEL) that won’t clear, especially with codes like P0601 (Internal Control Module Memory Check Sum Error) or U0100 (Lost Communication With ECM/PCM).
- ✔ Engine cranks but refuses to start.
- ✔ Rough or unstable idle.
- ✔ Sudden stalling or hesitation during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Transmission shifting issues or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
A Technician’s Notebook: The Intermittent Gremlin
A customer brought in their family’s 2006 Terraza with a problem that was driving them crazy. It would run perfectly for days, then suddenly stall at a stoplight or refuse to start after a short trip to the grocery store. They’d already replaced the battery and a couple of sensors with no luck. When I hooked up my scanner, I found intermittent communication loss codes. These are classic signs of an ECM failing internally due to heat cycles and age. The solder joints and processors get weak. We installed one of these VIN-programmed modules, and the problem was solved instantly. It saved them from endless guesswork and the cost of towing it to a dealer.
A Straightforward Guide to Installation
Replacing the 2006 Terraza Engine Control Module is a job most DIYers can handle with basic tools. Our pre-programmed module makes it a simple swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: On the 2006 Terraza with the 3.9L engine, the ECM is located in the engine compartment on the driver’s side (LH side).
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the old module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You may need to perform a simple security relearn procedure. Typically, this involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This allows the vehicle’s anti-theft system to recognize the new ECM.
Guaranteed Vehicle Compatibility
This ECM is a direct replacement for service number 12607096 and is also interchangeable with a wide range of other GM part numbers, including 12590032, 12602044, 12603530, 12605843, 12630457, and 19210737. It is guaranteed to fit the following models, provided the options match. Please verify your vehicle is on this list or that your original part number is listed.
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 air cleaner 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
Frequently Asked Questions
Why is VIN programming so important?
Programming the ECM to your VIN is essential because it syncs the module with your vehicle’s specific options, emissions standards, and security system (Pass-Key/Passlock). A non-programmed module will not start the vehicle or will cause significant performance problems. Our service saves you this step.
What information do you need from me after purchase?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot program and ship the module without it.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set will be sufficient to remove the old module and install the new one. The most important part is the security relearn procedure, which only requires using your ignition key.
Is this a reliable, long-term fix?
Absolutely. We use quality modules and load them with the latest, most stable software from GM. This addresses many of the glitches found in the original factory programming, providing a durable and dependable solution to get your Terraza back on the road with confidence.