Is Your GM Vehicle Running Rough or Refusing to Start?
If your truck, van, or SUV is suddenly stalling, running erratically, or displaying a persistent check engine light that no amount of guesswork can solve, the problem often lies with the very brain of your engine: the Electronic Control Module (ECM). As a mechanic with over two decades of experience under the hood, I’ve seen firsthand how a failing ECM can cause a cascade of frustrating, hard-to-diagnose issues. It controls everything from fuel mixture and ignition timing to transmission shifting, and when it starts to fail, your vehicle’s reliability disappears.
The Plug-and-Play Solution: No Dealer Visit Required
Forget expensive dealership diagnostics and programming fees. This Engine Control Module is the straightforward, effective solution you need. We take the hassle out of the repair by pre-programming the module specifically for your vehicle using your VIN. This means it arrives at your door loaded with the latest official GM software updates, ready for a direct installation. It’s a true plug-and-play fix that restores your vehicle’s performance and gets you back on the road with confidence.
From the Shop Floor: A Real-World Diagnosis
“A customer’s 2009 Savana 3500 work van came into my shop last month with an intermittent no-start condition that was costing him money every day it was down. He’d already replaced the battery and checked the fuel pump. The van would run fine for days, then suddenly refuse to crank after a hot soak. After connecting my scan tool and seeing communication dropouts with the ECM when the engine bay was warm, I knew exactly where to look. The original ECM’s internal circuits were failing under heat. We installed one of our VIN-programmed modules, and the van has been starting reliably ever since. It’s a classic failure mode for these units.”
Common Symptoms of a Failing ECM:
- โ Unexplained Check Engine Light illumination
- โ Engine stalling or shutting off while driving
- โ Intermittent no-start or hard-starting conditions
- โ Noticeable drop in fuel economy
- โ Poor engine performance, hesitation, or misfires
- โ Communication errors with diagnostic scan tools
The Smartest Fix for Your 2009 Savana 3500 Engine Computer
This isn’t just a replacement part; it’s a complete resolution. By providing us with your VIN, you ensure that the 2009 Savana 3500 Engine Computer you receive is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and emissions equipment. This module is a direct replacement for part numbers 12629009 and 12625455.
Simple Installation Guide
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- Locate the ECM: On the Savana/Express vans, the ECM is typically found in the left-hand (driver’s side) rear of the engine compartment. On trucks and SUVs, it’s usually on the driver’s side front of the engine compartment.
- Disconnect Wiring: Carefully unclip and disconnect the electrical harness connectors from the old module. Inspect the connectors for any corrosion or damage and clean them if necessary.
- Remove Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install New Module: Mount your new, pre-programmed ECM in place and secure the bolts.
- Reconnect: Firmly plug the wiring harnesses back 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 can typically be done without special tools by cycling the key and is a standard part of the GM anti-theft system.
Guaranteed Vehicle Compatibility
This 2009 Savana 3500 Engine Computer is guaranteed to fit a wide range of General Motors vehicles. Please verify your model and options from the list below to ensure a perfect match: