Restore Peak Performance to Your GM Vehicle
Is your 2005-2007 GMC Savana 1500 van, or another compatible GM truck, suffering from baffling engine problems? Issues like a persistent check engine light, rough idling, poor fuel economy, or erratic transmission shifting often point to a single culprit: a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel delivery and ignition timing to emission controls and automatic transmission operation. When it begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose symptoms.
This replacement Powertrain Control Module, part number 89017749, is the definitive solution to restore your vehicle’s original performance and reliability. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle using your VIN. This critical step ensures that the PCM is loaded with the latest GM software updates and is perfectly matched to your vehicle’s specific engine, transmission, and factory options. This eliminates the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2006 Express 2500 work van come into the shop that was driving the owner crazy. It would randomly stall at stoplights and had a check engine light for an intermittent crank sensor signal. The owner had already replaced the sensor twice with no luck. After verifying the wiring harness was intact, we suspected the PCM. The internal circuits that process the sensor’s signal were failing. We installed a VIN-programmed module, performed the security relearn, and the van ran perfectly. It’s a classic case where the symptoms point elsewhere, but the root cause is the vehicle’s brain itself.
Diagnosing a Faulty Savana 1500 PCM
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, it’s time to consider your PCM as the potential cause. This module is the direct solution for these common issues.
- ✔ Check Engine Light: The most common symptom, often with communication-related or random sensor codes (e.g., U-codes, P0601-P0606).
- ✔ Engine Stalling: Your vehicle may stall unexpectedly while driving or when coming to a stop.
- ✔ Rough Idle or Misfires: Inconsistent engine RPMs at idle or misfire codes that don’t resolve with new plugs or coils.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG.
- ✔ Failed Emissions Test: Inability to pass smog tests due to module-related errors.
- ✔ Harsh or Incorrect Shifting: The transmission may shift erratically, late, or slam into gear.
- ✔ No-Start Condition: The engine cranks but refuses to start, despite having fuel and spark.
Simple Installation Process
Our goal is to make your repair as straightforward as possible. Once you receive your VIN-programmed module, the physical installation is simple. For most Savana and Express vans, the module is located in the rear of the engine compartment on the driver’s side. For trucks like the Silverado and Sierra, it’s typically found under the battery tray. After swapping the hardware, you may need to perform a simple security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. Instructions for this procedure are widely available online for your specific model.
This module is a direct replacement for part numbers 12589462, 12602801, and 89017749, and fits a wide range of GM vehicles including the Silverado, Sierra, Suburban, Express, and more. Please verify the fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to get this module programmed?
No. We handle the programming for you before we ship the part. Simply provide your vehicle’s VIN during or after checkout, and we will load the latest GM-certified software for your specific vehicle.
Is this part difficult to install?
The physical installation is straightforward, usually involving disconnecting the battery, unplugging a few connectors, and unbolting the old module. The only additional step may be a security relearn procedure, which can often be done at home.
What is a VIN and where do I find it?
The VIN is your vehicle’s 17-digit Vehicle Identification Number. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your existing PCM (common codes include P0601, P0606), then this replacement module is the correct fix. It’s crucial to properly diagnose the issue before ordering.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the part to function correctly in your vehicle. We will contact you after your purchase to ensure we get the necessary information.