If you’re dealing with a frustrating check engine light, erratic engine performance, or a no-start condition in your 2006 Cadillac XLR, a failing Engine Control Module (ECM) is often the culprit. As the ‘brain’ of your vehicle’s engine, when the ECM falters, it can cause a cascade of confusing and costly problems. This replacement 2006 XLR Engine Control Module is the reliable, straightforward solution to restore your vehicle’s performance and peace of mind.
What sets this module apart is our professional programming service. Before we ship, we flash the module with the latest GM-certified software, tailored specifically to your vehicle’s VIN. This critical step ensures that the computer integrates seamlessly with your XLR’s systems, just like the original. You get the benefit of all factory-issued drivability and performance enhancements, without the expensive trip to a dealership for programming. It’s a direct-fit solution designed for both professional technicians and savvy DIYers.
Case Study: A Tricky Diagnosis
I remember a 2006 Cadillac XLR that came into my shop a few years back. The owner was at his wit’s end. He’d been to two other garages for an intermittent stalling issue and a persistent U0100 (Lost Communication with ECM/PCM) code. They had replaced the battery and checked all the grounds, but the problem remained. When I hooked up my professional scan tool, I noticed the live data stream from the ECM would occasionally freeze just before the engine cut out. This pointed to an internal processor fault, not an external wiring problem. We installed one of these VIN-programmed modules, performed the security relearn, and the car ran perfectly. The owner was thrilled to finally have a reliable car again. It’s a classic example of how a failing ECM can mimic other issues, making a quality, correctly programmed part essential for the right fix.
Is Your Cadillac Exhibiting These Faults?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs attention:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Vehicle refuses to start, even with a good battery and starter
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to pass emissions testing
- ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0602, or P0606
- ✔ Communication errors with scan tools (e.g., U0100)
A Straightforward Guide to Installation
Installing your new 2006 XLR Engine Control Module is a manageable job for someone with basic mechanical skills. For the 2006 XLR, the ECM is typically located in the right-hand (passenger side) front of the engine compartment.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On the 2006 XLR, you’ll find it in the RH front of the engine compartment. It’s a metal box with large electrical connectors.
- Disconnect Connectors: Carefully unlatch and remove the 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 and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed ECM into place.
- Reconnect Everything: Securely plug the wiring harness connectors into the new module. Reconnect the negative battery terminal.
- Perform Security Relearn: In many GM vehicles, a security relearn procedure is necessary for the vehicle to recognize the new ECM and start. This can typically be done without special tools by cycling the key in the ignition. Instructions are readily available online or in service manuals.
Verified Vehicle Compatibility
This ECM, part number 12603530, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737. Please verify your part number and check the detailed fitment list below to ensure compatibility.
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
How do I provide my VIN for programming?
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We will handle the programming with the latest GM software before shipping the module to you.
Is any other programming required after installation?
No, the module arrives ready to install. However, you may need to perform a simple ‘Security Relearn’ or ‘Anti-Theft Relearn’ procedure, which pairs the new ECM to your vehicle’s anti-theft system. This typically involves a few cycles of the ignition key and does not require special tools.
My original part number is different. Will this still work?
Yes, this ECM is a direct replacement for several service numbers, including 12590032, 12602044, 12605843, and others listed in the compatibility section. As long as your original module’s part number is on our interchange list, this part will function correctly in your vehicle.
What is the benefit of getting the newest GM updates?
GM frequently releases software updates to address common issues, improve transmission shifting, optimize fuel efficiency, and enhance overall engine performance. By flashing your module with the latest software, you’re getting a part that often performs better than the original one did when it was new.
Will this fix my specific problem?
This module is a guaranteed fix for problems directly caused by a faulty ECM, such as internal processor errors (P0601). While it resolves the most common symptoms listed, proper vehicle diagnosis is always recommended to ensure the ECM is the root cause of your issue before purchasing.