Is Your Chevy Uplander Experiencing Frustrating Engine Problems?
If your 2008 or 2009 Chevrolet Uplander is suddenly stalling, refusing to start, or showing a persistent Check Engine Light, the problem often points directly to a failing Engine Control Module (ECM). As the central computer for your engine, a faulty ECM can cause a cascade of issues, from poor fuel economy and rough idling to complete communication breakdown. I’ve seen it countless times in the shop: a vehicle owner has replaced sensors and other parts, only to find the core issue was the computer all along. This can be a frustrating and expensive diagnostic journey.
This is your reliable, straightforward solution. We offer a genuine GM Engine Control Module (service part #12602044) that arrives at your doorstep fully programmed to your van’s specific Vehicle Identification Number (VIN). We load it with the latest GM-certified software updates, ensuring optimal performance and communication with all your vehicle’s systems. This process eliminates the need for an expensive trip to the dealership for programming—a step that can often cost hundreds of dollars on its own.
Case Study: A Tricky Diagnosis
A customer brought in their 2009 Uplander 3.9L with an intermittent no-start condition that was driving them crazy. It would be fine for days, then suddenly refuse to crank. There were no consistent trouble codes, just a generic U0100 ‘Lost Communication with ECM’ code that would pop up occasionally. After verifying the battery, starter, and wiring harnesses were solid, we focused on the ECM. On the bench, we found that heat cycles were causing an internal board failure. We replaced it with one of our VIN-programmed modules, and the problem was solved instantly. The customer was back on the road with confidence, having avoided a costly misdiagnosis.
Common Signs of a Failing Uplander ECM
If you’re noticing any of the following symptoms, a faulty ECM is a likely culprit. A failing module can disrupt everything from fuel injection to spark timing, making a replacement necessary for reliable operation.
- ✔ Check Engine Light is illuminated or flashing
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason
- ✔ Complete no-start or hard-starting condition
- ✔ Noticeable decrease in fuel efficiency
- ✔ Poor or erratic automatic transmission shifting
- ✔ Scan tool cannot communicate with the ECM
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or U0100 are present
A Straightforward Guide to Installation
Installing your new 2008-2009 Uplander ECM is a manageable job for a DIYer with basic tools. Because we program it beforehand, you won’t need any special scan tools for the initial setup. Just follow these general steps.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On the 2008-2009 Uplander, the ECM is typically found in the LH (driver’s side) of the engine compartment. It’s a metal box with several large electrical connectors.
- Disconnect the Connectors: Carefully release the locking tabs on each wiring harness connector and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you’ll need it for the new unit.
- Install the New ECM: Mount the new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses firmly back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): While we handle the main programming, some vehicles may require a security or crank-sensor relearn procedure. This can often be done without special tools (consult your vehicle’s service manual) or by any local mechanic.
Verified Vehicle Compatibility
This module, part number 12602044, is a direct replacement for a wide range of GM vehicles and is interchangeable with service numbers 12590032, 12603530, 12605843, 12607096, 12630457, and 19210737. Please confirm your vehicle is on the list below. Providing your VIN at checkout is essential for us to ensure perfect compatibility and programming.
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096 (ECM)
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
ALLURE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
COLORADO 08 Electronic Control Module; (RH firewall)
CTS 06 Electronic Control Module; (RH engine compartment), V-Series, ID 12603530
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
DTS 06, 08 Electronic Control Module
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 19210737 or 12607096
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08-09 Electronic Control Module; 4.2L (LH engine)
G6 06-09 Electronic Control Module; (LH front engine compartment), multiple engine/ID matches
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
HUMMER H3 08 Electronic Control Module; (RH firewall)
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
ION 06 Electronic Control Module; 2.4L (opt LE5)
ISUZU ASCENDER 08 Electronic Control Module; 4.2L
ISUZU I-290 08 Electronic Control Module; (RH firewall)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
LUCERNE 06, 08 Electronic Control Module; (lower part of air cleaner box), 4.6L
MALIBU 06, 08-10 Electronic Control Module; various engines and options
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
MONTANA 06, 08-09 Electronic Control Module; (LH engine compartment)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
SAAB 9-7X 07-08 Electronic Control Module; (LH engine), various engines
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
SRX 08 Electronic Control Module; (LH engine compartment), (4.6L)
STS 06, 08 Electronic Control Module; (LH frame rail), 4.4L or 4.6L
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07-09 Electronic Control Module; (LH engine), various engines
VUE 08-10 Electronic Control Module; various engines and options
XLR 06, 08-09 Electronic Control Module; (RH front engine compartment)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle the programming for you. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct, updated GM software before shipping it to you.
Is this a simple plug-and-play installation?
For 99% of vehicles, yes. Once you install the module we’ve programmed, the vehicle will start and run. In rare cases, a security relearn or crankshaft position sensor relearn may be required, which is a simple procedure that can be done by any mechanic or savvy DIYer.
Where do I find my VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard (viewable through the windshield) and the driver’s side door jamb sticker.
Will this fix my specific problem?
This 2008-2009 Uplander ECM is a direct solution for a failed module. While it resolves the common symptoms listed, we always recommend a proper diagnosis by a qualified technician to confirm the ECM is the root cause of your issue before ordering.
What if I have a different part number on my old ECM?
This module is a direct replacement for several service numbers, including 12590032, 12603530, 12605843, and more. As long as your vehicle is on our compatibility list, this module will function correctly once programmed to your VIN.
What is your warranty policy?
We stand behind our parts and programming. This module comes with a comprehensive warranty that covers defects in the unit and the programming service. Please see our warranty page for full details.