Restore Peak Performance to Your GM Vehicle
Is your vehicle suffering from frustrating, hard-to-diagnose issues like a persistent Check Engine Light, sudden stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. This isn’t just an inconvenience; it affects fuel economy, emissions, and overall drivability. As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can turn a reliable car into a source of constant stress. This replacement Engine Control Module, part number 12590032, is the definitive solution to restore your vehicle’s factory performance and reliability.
What sets this module apart is our professional programming service. Before we ship it, we flash the unit with the latest official GM software updates, specifically matched to your vehicle using its unique Vehicle Identification Number (VIN). This means you receive a part that is truly plug-and-play, eliminating the need for an expensive trip to the dealership for programming. This is the same process we use in our shop to guarantee a seamless repair. For anyone tackling this job at home or in a professional bay, this service saves significant time, money, and hassle, getting you or your customer back on the road with confidence. This is the correct fix for a faulty computer, not a temporary patch.
A Technician’s Notebook: The Intermittent No-Start Cadillac
A 2006 Cadillac STS came into the bay with a problem that drives owners crazy: an intermittent no-start. It would be fine for days, then suddenly refuse to crank. The battery was good, starter tested fine, and there were no obvious wiring issues. The scan tool showed a loss of communication with the ECM (DTC U0100) but only intermittently. After checking power and ground feeds to the module connectors, we suspected the ECM itself was failing internally, likely due to heat cycles causing a fracture on the circuit board. We installed a VIN-programmed 2006 XLR Engine Control Module (the same family of ECMs) and the problem was solved instantly. The customer was thrilled to have their reliable car back without the guesswork.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, a faulty module is a likely culprit. Proper diagnosis is key, and these signs often point directly to the vehicle’s computer.
- ✔ Check Engine Light is illuminated with ECM-specific codes like P0601, P0606, or P060A.
- ✔ Engine cranks but will not start.
- ✔ Unexplained stalling or rough idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Communication errors with your scan tool.
- ✔ Erratic transmission shifting or other electronic accessory problems.
- ✔ Vehicle enters a reduced power or “limp” mode.
A Straightforward Guide to Installation
Replacing your ECM is a manageable job for a DIY enthusiast with basic tools. Our pre-programming service handles the most complex part, making the physical swap simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the ECM: The location varies by model (see fitment list for clues, e.g., ‘RH firewall’ or ‘lower air cleaner housing’). It’s a metal box with large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt the new, programmed ECM into place. Firmly reconnect the wiring harnesses, ensuring the locking tabs click securely into place. A clean, tight connection is critical.
- Reconnect and Start: Reconnect the negative battery terminal. In some GM vehicles, a security relearn procedure may be necessary. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and verify the Check Engine Light is off and the vehicle runs smoothly.
Verified Vehicle Compatibility
This module, part number 12590032, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. Please verify your vehicle is on this list and provide your VIN upon purchase for correct programming.
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
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this number to load the exact, most current GM-approved software for your specific vehicle onto the module before shipping. This ensures perfect compatibility and function right out of the box.
Is this a simple plug-and-play installation?
Yes, for most vehicles. Because we pre-program the module, you will not need a special scan tool for setup. You simply install the part, and in some cases, you may need to perform a simple security relearn procedure that does not require any special tools.
Do I need to send my old ECM back (core charge)?
No core charge is required for this part. You can keep or responsibly dispose of your old module without the hassle of returning it.
Will this fix my specific problem?
This ECM will resolve issues directly caused by a faulty module. It’s crucial to ensure a proper diagnosis has been performed. If your vehicle has symptoms like a no-start condition, communication error codes (like P0601), or erratic behavior that isn’t tied to other sensors or wiring, this is very likely the solution.
What if my part number is slightly different?
This module directly replaces several service numbers, including 12602044, 12603530, and others listed in the description. As long as your vehicle and original part number are listed in our compatibility chart, this module will work perfectly.