Restore Peak Performance to Your Cadillac STS
Is your 2006 Cadillac STS running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. A faulty ECM can cripple your car’s performance, fuel economy, and reliability. This isn’t just an inconvenience; it’s a problem that needs a dependable solution. We offer a reliable, direct-fit 2006 STS Engine Control Module that arrives at your door pre-programmed and ready for installation, getting you back on the road without the dealership hassle and expense.
Case Study: A Tricky Diagnosis
A few months back, a 2006 Cadillac STS with the 4.4L engine was towed into my shop. The customer’s complaint was intermittent stalling and a complete no-start condition that morning. The dashboard was lit up, and they’d already replaced the battery and alternator with no luck. My initial scan pulled a P0601 (Internal Control Module Memory Check Sum Error) and U0100 (Lost Communication with ECM). While other shops might chase sensor issues, my experience pointed directly to the ECM. We ordered a VIN-programmed module, and once it arrived, the physical swap on the LH frame rail took less than 20 minutes. After performing the security relearn, the car started instantly and ran perfectly. This pre-programmed module saved my customer hundreds in diagnostic time and dealership programming fees.
Is Your Cadillac Exhibiting These ECM Failure Signs?
A failing engine computer can manifest in numerous ways. As the brain of your engine, even a small internal fault can cause major drivability issues. Look out for these common symptoms:
- âś” Check Engine Light is on with codes like P0601, P0606, or U0100.
- âś” The engine cranks but refuses to start.
- âś” Unexplained drops in fuel efficiency.
- âś” Rough or erratic idling and stalling.
- âś” Hesitation or stumbling during acceleration.
- âś” Transmission shifting problems or harsh shifts.
- âś” Failure to pass state emissions testing.
The Power of Pre-Programming: A True Plug-and-Play Solution
The biggest hurdle in replacing a modern ECM is the required programming. Without it, the vehicle’s anti-theft system won’t allow the car to start. Our service eliminates this step. Simply provide us with your vehicle’s 17-digit VIN during checkout. Our technicians will flash this 2006 STS Engine Control Module with the latest, most stable software updates directly from GM. This ensures perfect communication between the new module and your vehicle’s existing systems, restoring factory performance and efficiency.
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for a DIY enthusiast. While specific steps can vary slightly by model, here is a general guide for the Cadillac STS:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: On the 2006 Cadillac STS, the Engine Control Module is typically located on the left-hand (driver’s side) frame rail in the engine compartment.
- Disconnect the Wiring: Carefully unclip and remove the electrical connectors from the old module. These connectors have locking tabs that need to be released before pulling.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely re-fasten the bolts.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This syncs the new ECM with your car’s security system.
Verified Vehicle Compatibility
This ECM, part number 12603530, is a direct replacement for a wide range of GM vehicles and interchanges with service numbers 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737. Please verify your vehicle is on the list below:
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
What do I need to provide for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we have this information to program it correctly for your specific vehicle.
Is any additional programming required after installation?
No, this module arrives fully programmed. However, you will likely need to perform a simple ‘Security Relearn’ procedure, which involves a sequence of key turns to sync the new ECM with your car’s anti-theft system. This does not require any special tools.
Will this fix my specific problem?
This module is the definitive fix for a faulty ECM. If your vehicle has been properly diagnosed with a bad ECM, this part will resolve the associated issues, such as no-start conditions, communication error codes (like U0100), and internal processor faults (like P0601).
How do I find my VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard, visible through the windshield.
Is this a brand new part?
This is a high-quality, tested, and verified used OEM part. Each unit is inspected and then programmed with the latest GM software to ensure it meets or exceeds original factory specifications for performance and reliability.