Restore Peak Performance to Your 2008 HUMMER H3
Is your rugged 2008 HUMMER H3 suddenly feeling unreliable? Are you dealing with frustrating issues like stalling at intersections, a persistent check engine light, or a complete no-start condition? The Engine Control Module (ECM) is the brain of your vehicle, and when it starts to fail, it can cause a cascade of perplexing problems. This isn’t just an inconvenience; it’s a matter of reliability and safety. In my 20+ years of experience, I’ve seen how a faulty ECM can mimic a dozen other issues, leading to wasted time and money on incorrect diagnoses.
This is your direct, effective solution. We are offering a high-quality replacement Engine Control Module, part number 19210737, that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest, most stable software from GM, ensuring your H3 operates exactly as the engineers intended. This critical step eliminates the need for expensive dealership programming or specialized tools, making the repair process faster and more affordable for both professional technicians and DIY enthusiasts.
A Technician’s Notebook
I remember a 2008 H3 that came into the shop with a complaint that was driving the owner crazy. It would randomly stall when coming to a stop, but only after it was fully warmed up. There were no consistent trouble codes, just a generic U0100 (Lost Communication with ECM) that would pop up occasionally. We checked grounds, wiring, and other modules for weeks. Finally, on a hunch, we monitored the ECM’s internal temperature data and saw it spiking just before a stall. The processor was overheating internally. We installed one of these VIN-programmed modules, and the problem was solved instantly. It’s a classic example of how a failing ECM can create ghost-like issues that are impossible to trace without replacing the core component.
Is Your H3 Showing These Telltale Signs?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, your engine computer is the likely culprit:
- ✔ Check Engine Light is on with codes like P0601, P0602, P0603, P0604, P0605, or P0606 (Internal Control Module Processor Errors).
- ✔ Vehicle will not start or is very difficult to start.
- ✔ Engine stalls unexpectedly while driving or idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or unstable idle.
- ✔ Poor engine performance and lack of acceleration.
- ✔ Transmission shifting issues or failure to shift.
Your Straightforward H3 ECM Installation Guide
Replacing the ECM on your HUMMER H3 is a manageable job for someone with basic mechanical skills. Our pre-programmed module makes it even simpler. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the 2008 H3, the Engine Control Module is located in the engine compartment, mounted to the right-hand (passenger side) firewall.
- Disconnect the Module: Carefully release the locking tabs and unplug the wiring harness connectors from the old ECM. Take care not to damage the pins or connectors.
- Remove the Old Unit: Unbolt the mounting hardware that secures the old ECM to the firewall and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure may be required for the vehicle to start. This procedure can typically be performed without special tools and instructions are widely available online or in service manuals.
Verified Compatibility Across GM, Isuzu & Saab
This module, service number 19210737, is a direct replacement for a wide range of vehicles. Please verify your vehicle is on this list. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737.
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 does the VIN programming service work?
How does the VIN programming service work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians then use this VIN to load the latest, most stable GM factory software specific to your vehicle’s configuration directly onto the module before it ships. This ensures perfect compatibility.
Is this part truly plug-and-play?
How does the VIN programming service work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians then use this VIN to load the latest, most stable GM factory software specific to your vehicle’s configuration directly onto the module before it ships. This ensures perfect compatibility.
Will this fix my check engine light?
How does the VIN programming service work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians then use this VIN to load the latest, most stable GM factory software specific to your vehicle’s configuration directly onto the module before it ships. This ensures perfect compatibility.
What if my original part number doesn’t match 19210737 exactly?
How does the VIN programming service work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians then use this VIN to load the latest, most stable GM factory software specific to your vehicle’s configuration directly onto the module before it ships. This ensures perfect compatibility.