Restore Your Van’s Reliability and Performance
Is your 2005-2007 GMC Savana 1500 giving you headaches? Unexplained stalling, a persistent Check Engine Light, or rough, unpredictable engine behavior can bring your work or travels to a grinding halt. As the central computer for your engine and transmission, a failing Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating issues. In my 20+ years of diagnostics, I’ve seen countless vehicle owners and even professional shops chase symptoms by replacing sensors and pumps, only to find the problem was in the module all along. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s core functionality.
This module, part number 89017749, arrives at your door fully programmed to your specific vehicle. We take your Vehicle Identification Number (VIN) and flash the unit with the latest, most stable software updates directly from GM. This critical step ensures seamless communication between all your vehicle’s systems, from fuel injection and ignition timing to transmission shifting. By providing a properly configured 2005-2007 Savana 1500 PCM, we eliminate the need for expensive dealership programming, saving you time, money, and the hassle of towing your vehicle to a service center.
Case Study: A Tricky Diagnosis
A local contractor brought in his ’06 Savana 2500, a workhorse with identical electronics to the 1500 model. The van had an intermittent no-start condition and would occasionally stall at idle. He had already replaced the fuel pump and crankshaft position sensor based on another shop’s advice, with no improvement. After hooking up my scanner, I noticed inconsistent data readouts from multiple sensors—a classic sign of a struggling PCM. The module’s internal processor was failing, causing it to misinterpret signals. We installed a VIN-programmed PCM, performed the security relearn, and the van fired up instantly. The problem was solved. This case highlights how a faulty module can mimic other component failures, making a reliable, pre-programmed PCM the most effective fix.
Is Your Savana Van Showing These Signs?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, this module is the likely solution:
- âś” Unexplained Check Engine Light, especially with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- âś” Engine stalling, stumbling, or running rough for no apparent reason.
- âś” Harsh or erratic automatic transmission shifting.
- âś” A complete no-start condition where the engine cranks but won’t fire up.
- âś” Noticeable decrease in fuel economy.
- âś” Failure to pass an emissions test due to module-related errors.
A Straightforward Guide to Installation
Installing your new 2005-2007 Savana 1500 PCM is a manageable job for a DIYer with basic tools. Our pre-programming service handles the most complex part for you.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On the Savana and Express vans, the PCM is typically found in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. These connectors have locking tabs that need to be released. Avoid forcing them.
- Remove the Old PCM: Unbolt the old module from its mounting bracket.
- Install the New PCM: Mount the new module securely in the bracket and firmly reconnect the wiring harnesses. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Necessary): In many cases, you will need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new PCM to recognize your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 89017749, 12589462, and 12602801. It is guaranteed to fit the following vehicles and configurations:
- GMC SAVANA 1500 VAN: 2005, 2006, 2007
- CHEVROLET EXPRESS 1500 VAN: 2005, 2006, 2007
- GMC SAVANA / CHEVROLET EXPRESS 2500 & 3500 VANS: 2005, 2006, 2007 (Gasoline Engines)
- CHEVROLET SILVERADO / GMC SIERRA 1500 PICKUP: 2005, 2006, 2007 (Classic Style, 4.3L Engine)
- CHEVROLET SILVERADO / GMC SIERRA 2500 & 3500 PICKUP: 2005, 2006, 2007 (Classic Style, 8.1L Gasoline Engine)
- CHEVROLET AVALANCHE 2500: 2005, 2006
- CHEVROLET SUBURBAN 2500 / GMC YUKON XL 2500: 2005, 2006 (8.1L Engine)
- GMC SAFARI / CHEVROLET ASTRO: 2005
- CHEVROLET BLAZER S10 / GMC JIMMY S15: 2005
- CADILLAC CTS: 2004-2005 (V-Series, check ID)
Frequently Asked Questions About Your New PCM
Frequently Asked Questions
How do I provide my VIN for programming?
After completing your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your module until we receive this information.
Is this a plug-and-play part?
Yes, for the most part. Because we program it to your VIN, it eliminates the need for a dealer scan tool. However, you may need to perform a simple key-cycle security relearn procedure, which requires no special tools.
Will this fix my specific problem?
This module corrects issues directly caused by a faulty PCM, including many common check engine light codes, stalling, and no-start problems. It’s crucial to ensure your vehicle’s mechanical and other electrical components are in good working order first.
What if my original part number is 12589462 or 12602801?
This module, 89017749, is a fully compatible and updated replacement for those part numbers. It will function identically in all listed applications.
Is any additional setup required after installation?
Besides the potential security relearn, no other setup is needed. The programming we perform covers engine and transmission parameters specific to your VIN. Your 2005-2007 Savana 1500 PCM will be ready to go.