If you’re dealing with frustrating, hard-to-diagnose engine problems on your 2006 Cadillac XLR, you know how quickly a simple drive can turn into a major headache. Unexplained stalling, a persistent check engine light, or a car that simply won’t start can point to a failing Engine Control Module (ECM)—the central computer of your vehicle. This isn’t just an inconvenience; it’s a critical component failure that affects performance, fuel economy, and safety. I’ve seen it countless times in my 20+ years in the shop: owners replace sensor after sensor, only to find the root cause was the ECM all along.
This is your direct-fit, reliable solution. We offer a genuine GM Engine Control Module (Part #19210737) that arrives at your door fully programmed and ready for installation. Forget expensive dealership visits and towing fees. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash the module with the latest, most stable software directly from General Motors. This ensures perfect communication with your vehicle’s existing systems and restores the precise engine management your XLR was designed for.
Is Your Vehicle’s Brain Failing? Common ECM Symptoms
A faulty 2006 XLR Engine Control Module can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following, your ECM is a likely culprit:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Problems with the transmission shifting, as the ECM communicates with the TCM.
- ✔ Complete no-start condition where the engine cranks but won’t turn over.
- ✔ Intermittent issues that seem to disappear and then return, often related to temperature changes.
Case Study: A Tricky Diagnosis
I remember a 2006 Cadillac STS—a close relative to the XLR—that came into the bay with an intermittent no-start condition that had stumped two other shops. The owner was frustrated, having already paid for a new fuel pump and crankshaft sensor. We hooked up our diagnostic scanner and found no active codes, but the live data stream showed erratic voltage readings from the ECM’s main processor during cranking. After confirming all power and ground connections were solid, we knew where the problem was. We installed a VIN-programmed ECM, and the car fired up instantly and never had the problem again. It’s a classic example of how a failing 2006 XLR Engine Control Module can be the hidden cause of major issues.
A Straightforward Guide to Your ECM Swap
Installing your new ECM is a manageable job for a confident DIYer. While the exact location can vary slightly based on your model (the XLR’s is typically in the right front engine compartment), the process is generally the same. This pre-programmed module eliminates the most difficult step, making it a true plug-and-play repair.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- Locate the ECM: On the 2006 XLR, you’ll typically find the ECM in the engine compartment on the passenger (RH) side. It’s a metal box with several large electrical connectors.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the pins 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 2006 XLR Engine Control Module in the same location and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new ECM until they click into place. Reconnect your negative battery terminal.
- Final Steps: Some vehicles may require a security relearn procedure, which can often be done by cycling the key. Your vehicle’s service manual will have the specific instructions. Start the engine and enjoy restored performance!
Verified Compatibility Across the GM Family
This module, service number 19210737, is a versatile component used across a wide range of General Motors vehicles. It is a direct replacement for service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 12630457. Please verify your vehicle from the list below to ensure a perfect match.
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
Do I need to do anything after I install this ECM?
Because we program the module to your VIN before shipping, it is a plug-and-play installation for most vehicles. However, some models may require a simple security or CASE (Crankshaft Angle Sensor Error) relearn procedure. This can typically be done with a capable bidirectional scan tool or by following instructions in your vehicle’s service manual.
What does ‘flashed with the newest updates’ mean?
Manufacturers like GM often release software updates to fix bugs, improve performance, or enhance fuel efficiency long after the vehicle is sold. We ensure your replacement ECM is loaded with the very latest software available for your specific VIN, giving you benefits you wouldn’t get from a standard used part.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your part without it. You can usually find your VIN on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Is this part compatible with other service numbers?
Yes. This module, part number 19210737, is a direct replacement for several other GM service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 12630457, ensuring broad compatibility.