Restore Your Montana’s Performance and Reliability
If you’re dealing with a frustrating check engine light, stalling, poor fuel economy, or a no-start condition in your 2008-2009 Pontiac Montana, a failing Engine Control Module (ECM) is a very likely culprit. As a mechanic with over two decades of diagnostic experience, I’ve seen firsthand how a faulty ECM can create a cascade of baffling issues. The ECM is the brain of your engine, and when it’s not functioning correctly, your vehicle’s performance and dependability suffer.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost out of the equation by programming this module with the latest GM-certified software specifically for your vehicle’s VIN. This means you can skip the expensive trip to the dealership for programming. You get a reliable part that’s ready to go right out of the box, restoring your minivan to its proper operational state. This is the same process we use in the shop to get our customers back on the road safely and affordably.
Case Study: A Tricky Diagnosis
I remember a 2008 Montana SV6 that came into the bay with intermittent stalling and a persistent P0601 (Internal Control Module Memory Check Sum Error) code. The owner had already replaced the spark plugs and a couple of sensors with no luck. The symptoms were erratic, making it hard to pin down. After verifying power and ground to the module were solid, we knew the internal processor of the original ECM was failing. We installed one of our VIN-programmed modules, performed the simple 10-minute security relearn, and the van ran perfectly. It’s a classic example of how chasing symptoms can be costly, while addressing the root cause—the failing 2008-2009 Montana Engine Module—is the real fix.
Is Your Minivan Showing These Symptoms?
- ✔ Persistent Check Engine Light with codes like P0601, P0606, or U0100
- ✔ Unexplained engine stalling or hesitation during acceleration
- ✔ Noticeable decrease in fuel mileage
- ✔ The engine cranks but refuses to start
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
A Straightforward Guide to Installation
Installing your new 2008-2009 Montana Engine Module is a job most DIYers can handle with basic tools. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On the 2008-2009 Montana, the ECM is typically found in the engine compartment on the driver’s side (LH).
- Disconnect the Wiring: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the mounting hardware that secures the old ECM to its bracket. Remove the old module from the vehicle.
- Install the New Module: Place your new, pre-programmed module into the bracket and secure it with the original bolts.
- Reconnect Everything: Firmly plug the electrical connectors back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Step: In some cases, a simple security relearn procedure may be necessary. This can typically be done without any special tools by cycling the key in the ignition.
Will This Fit My Vehicle?
This ECM, part number 19210737, is a direct replacement for a wide range of GM vehicles and is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 12630457. While this listing is for the 2008-2009 Montana Engine Module, please check the comprehensive list below to confirm compatibility with your specific make, model, and engine.
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
How do I provide my vehicle’s VIN?
It’s simple. After you complete your purchase, we will contact you to request your vehicle’s 17-digit VIN. We cannot program and ship your module without it.
Is any additional programming required once I install it?
No, this module arrives fully programmed and ready for installation. Most vehicles will start and run perfectly. Some may require a simple, tool-free security relearn procedure that takes about 10-15 minutes.
What if my original part number is different from 19210737?
No problem. This ECM is a direct, interchangeable replacement for many GM service numbers, including 12590032, 12602044, 12605843, and others listed above. As long as your vehicle is on the fitment list, this module will work.
Is this a reliable, long-term fix?
Absolutely. We use tested hardware and load it with the latest stable software from GM. This addresses common failure points and ensures your vehicle operates as the manufacturer intended.