Is Your Chevrolet Uplander Running Rough?
If your 2008 or 2009 Chevrolet Uplander is experiencing frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, the problem may lie with a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle’s engine management system, controlling everything from fuel injection and ignition timing to emissions and transmission function. When it fails, it can cause a cascade of problems that are often difficult to diagnose.
From the Diagnostic Bay
We once had a 2009 Uplander come into the shop that had its owner completely stumped. He had replaced spark plugs, ignition coils, and even a mass airflow sensor trying to chase down a random misfire and terrible gas mileage. The check engine light would come on and off intermittently. After connecting our diagnostic scanner, we noticed communication dropouts with the engine module. A quick check of the power and grounds to the ECM confirmed they were solid. The root cause wasn’t any of the sensors he replaced; it was the ECM itself slowly failing. A new, properly programmed module had the van running perfectly in under an hour.
Symptoms of a Failing Uplander ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Engine stumbling, misfiring, or stalling unexpectedly.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle cranks but refuses to start.
- ✔ Loss of power and sluggish acceleration.
- ✔ Communication errors when using an OBD-II scan tool.
The Plug-and-Play Solution: A Pre-Programmed 2008-2009 Uplander ECM
Don’t let a faulty computer keep your van off the road. This Engine Control Module is the reliable, straightforward solution you need. We eliminate the guesswork and the need for expensive dealership programming. When you purchase this module, we flash it with the latest official GM software updates specifically for your vehicle using the VIN you provide. This ensures that the module is 100% compatible with your Uplander’s specific configuration, including its engine, transmission, and emissions equipment.
This is not just a replacement part; it’s a complete solution designed to restore your vehicle’s performance and reliability. The module arrives at your door ready for installation. In most cases, the only additional step required is a simple security relearn procedure, which can be performed without any special tools. This process syncs the new ECM with your vehicle’s anti-theft system.
Guaranteed Compatibility
This ECM, part number 12602044, is a direct replacement for a wide range of GM vehicles and is interchangeable with the following service numbers:
- 12590032
- 12602044
- 12603530
- 12605843
- 12607096
- 12630457
- 19210737
While this listing is focused on the 2008-2009 Chevrolet Uplander, this versatile module also fits an extensive list of other GM models, including the Buick Allure, Cadillac DTS, Pontiac G6, Saturn VUE, and many more. Please verify the part number to ensure it matches your specific application.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is your vehicle’s main computer. It takes data from sensors all over the engine and uses it to control fuel delivery, spark timing, transmission shifts, and emissions systems to ensure the engine runs efficiently and powerfully.
Do I need to program this module?
No. This ECM comes pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN during or after checkout, and we will flash the module with the latest GM software before shipping it to you. It arrives ready to install.
Where is the ECM located on a 2008-2009 Uplander?
On the 2008-2009 Chevrolet Uplander with the 3.9L engine, the ECM is typically located in the left-hand (driver’s side) engine compartment. Always disconnect the battery before attempting to remove or install the module.
What information do you need from me?
We need your vehicle’s 17-digit VIN to program the module correctly. You can usually find the VIN on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Will I need to perform a security relearn procedure?
Yes, in most cases, you will need to perform a security relearn (also known as a Passlock or anti-theft relearn). This is a simple procedure that syncs the new ECM to your vehicle’s keys and can typically be done in your driveway by cycling the ignition key. Instructions are widely available online or in your vehicle’s service manual.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM, then yes, this replacement module will resolve the issue. It’s crucial to ensure your vehicle’s issues have been properly diagnosed before ordering, as this part will not fix problems caused by faulty sensors, wiring, or other mechanical components.