Restore Peak Performance to Your GM Vehicle
If you’re dealing with baffling engine problems like a persistent check engine light, rough idling, stalling, or a frustrating no-start condition, the culprit is often the Engine Control Module (ECM). As an experienced technician, I’ve seen firsthand how a failing ECM—the electronic brain of your vehicle—can disrupt everything from fuel delivery to transmission shifting. This isn’t just an inconvenience; it affects your vehicle’s reliability, fuel economy, and safety. This replacement ECM is your direct-fit, reliable solution, arriving pre-programmed to your vehicle’s specific VIN.
We take the guesswork and expensive dealership trips out of the equation. By providing us with your VIN during checkout, we flash this module with the latest GM-certified software for your exact vehicle. This ensures that once installed, it communicates seamlessly with all other onboard systems, restoring the precise performance and efficiency you expect. This isn’t a generic, one-size-fits-all part; it’s a component meticulously prepared for your specific 2007-2009 Envoy Engine Control Module or other compatible GM model.
Case Study: A Tricky Diagnosis
I remember a 2008 Envoy that came into my shop with a problem that had stumped two other mechanics. The owner described intermittent stalling at red lights and a check engine light that would come and go. They’d already replaced the throttle body and MAF sensor with no luck. A deep scan revealed a ghost-like P0606 code (ECM/PCM Processor Fault) that only appeared under specific conditions. After verifying all wiring and grounds were solid, we swapped in a pre-programmed ECM. The stalling vanished, and the code never returned. It’s a classic example of how internal ECM failure can mimic sensor issues, making a quality replacement the only true fix.
Is Your Vehicle Exhibiting These ECM Failure Signs?
A faulty Engine Control Module can manifest in numerous ways. If you’re noticing any of the following, it might be time for a replacement. A proper diagnosis is always recommended, but these are tell-tale indicators I’ve seen countless times.
- âś” Persistent Check Engine Light (CEL) on your dashboard.
- âś” Common diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or U-series communication codes.
- âś” Engine stalling, stuttering, or misfiring for no apparent reason.
- âś” A complete no-start condition where the engine cranks but won’t fire up.
- âś” Noticeable decrease in fuel efficiency.
- âś” Erratic or poor automatic transmission shifting.
- âś” Failure to pass state emissions testing.
A Straightforward Guide to Your ECM Installation
Installing your new 2007-2009 Envoy Engine Control Module is a manageable job for a confident DIYer. While specific locations vary (check your service manual), the general process is consistent. Always prioritize safety.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the 2007-2009 Envoy, the ECM is typically found on the driver’s side of the engine bay. Consult your vehicle’s service manual for the exact location.
- Disconnect the Wiring Harnesses: Carefully unclip the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the bolts.
- Reconnect Everything: Plug the wiring harnesses back into the new ECM until they click securely in place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): In some GM vehicles, a security or anti-theft relearn procedure is required. This typically involves cycling the key in the ignition. Consult your service manual for the specific steps for your vehicle.
Verified Vehicle Compatibility List
This ECM, part number 12630457, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. Please verify your model and options below to ensure a perfect match. A correct match is crucial for the proper function of your 2007-2009 Envoy Engine Control Module and other systems.
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
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the ECM with the exact software and calibrations for your specific vehicle. This ensures perfect compatibility with your engine, transmission, and options package, preventing future issues.
Is this a plug-and-play part?
Yes, for most vehicles. Because we pre-program it to your VIN, it’s ready for installation. Some models may require a simple security relearn procedure, which can be done without special tools. We recommend checking your vehicle’s service manual for specifics.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM (e.g., codes P0601, P0606), then yes, this part will resolve the issue. However, you should always perform a proper diagnosis to ensure the ECM is the root cause and not another sensor or component.
What does an Engine Control Module do?
The ECM is the central computer for your engine. It controls critical functions like fuel injection timing, spark timing, idle speed, and emissions systems by reading data from sensors all over the vehicle and making real-time adjustments.
Can I install this myself?
A confident DIY mechanic with basic tools can typically install this module in about an hour. The most important steps are disconnecting the battery and being careful with the wiring harness clips. Following our installation guide will help you through the process.