Is Your Savana Van Stalling, Shifting Erratically, or Refusing to Start?
If your reliable GMC Savana 1500 is suddenly giving you headaches with a persistent Check Engine Light, rough idling, poor fuel mileage, or even intermittent no-start conditions, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your van, the PCM controls everything from fuel injection and spark timing to transmission shift points. When it starts to fail, it can create a cascade of confusing and frustrating issues.
From the Shop Floor: A customer’s ’06 Savana 1500 came in last week with these exact symptoms. It would crank but not start intermittently, and when it did run, the transmission shifted harshly. After confirming good fuel pressure and spark, our diagnostics led us to a faulty PCM. The internal drivers that control the transmission solenoids were failing due to years of heat cycles in the engine bay. It’s a common failure I’ve diagnosed on hundreds of these GM vans.
The Direct-Fit Solution: A Pre-Programmed PCM
Get your workhorse back on the road without the astronomical cost and hassle of a dealership visit. This replacement Powertrain Control Module is the definitive solution for your 2005-2007 Savana 1500. The critical difference with our service is that we program the module specifically for your van’s unique 17-digit VIN before it ever leaves our facility. This ensures it arrives with the latest GM software updates and is ready for a straightforward installation.
- ✔ VIN-Programmed for Your Van: We load the correct software for your specific engine, transmission, and options.
- ✔ Latest GM Software Updates: Corrects known factory bugs and improves drivability and efficiency.
- ✔ True Plug-and-Play: No need for an expensive programming appointment at the dealer.
- ✔ Solves Common Issues: A permanent fix for false error codes, poor performance, and no-start problems.
- ✔ Broad Compatibility: Replaces part numbers 12589462, 12602801, and 89017749.
Simple Installation for Your 2005-2007 Savana 1500 PCM
You don’t need to be a master technician to replace this module. With basic hand tools, you can have your van running properly in under an hour.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: On your Savana van, the PCM is located in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect Harnesses: Carefully lift the locking levers on the electrical connectors and gently pull them straight out from the module.
- Remove the Old PCM: Unbolt the old module from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed module in place, then securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: In most cases, you will need to perform a simple security relearn. Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. The ‘Security’ light on the dash should turn off. Then, turn the key off for 10 seconds, and your van should start and run normally.
Expert Pro Tip:
Before plugging in your new PCM, take a moment to inspect the harness connectors for any green or white crusty corrosion or bent pins. A poor connection is the number one cause of repeat failures or immediate issues. Use a small pick to straighten any bent pins and some quality electrical contact cleaner to ensure a perfect, clean connection.