Restore Your Vehicle’s Performance and Reliability
Is your 2005 GMC Safari, Chevrolet Silverado, or other compatible GM vehicle suffering from poor performance, a persistent check engine light, or intermittent stalling? These are common indicators of a failing Powertrain Control Module (PCM), the central computer that manages your engine’s operation. This replacement PCM, part number 89017749, is the definitive solution to restore your vehicle’s factory performance, fuel efficiency, and smooth operation. We take the guesswork and high cost out of the equation by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships.
From the Diagnostic Bay
We recently had a 2006 Silverado 2500 with the 8.1L V8 come into the shop with a frustrating, intermittent no-start condition. The owner had already replaced the battery and checked the fuel pump. After running diagnostics, we found communication errors pointing to the PCM, which was failing when it got hot. Instead of a costly trip to the dealership for a new unit and programming, we installed a VIN-programmed module just like this one. The truck fired up instantly and ran perfectly. This simple swap saved the customer hundreds of dollars and significant downtime.
Common Symptoms of a Failing Powertrain Module
- ✔ Check Engine Light: The most common sign, often with codes related to sensors, emissions, or module communication.
- ✔ No-Start or Hard Starting: The engine may crank but fail to start, or take an unusually long time to fire up.
- ✔ Poor Fuel Economy: An improperly functioning PCM can’t optimize the air-fuel mixture, leading to wasted gas.
- ✔ Rough Idle or Stalling: The engine may run erratically, shake, or shut off unexpectedly at stops.
- ✔ Failed Emissions Test: Incorrect engine parameters will almost certainly cause a failure at the testing station.
- ✔ Erratic Transmission Shifting: The PCM also communicates with the transmission, and a fault can cause harsh or incorrect shifts.
Why Choose Our Programmed 2005 GMC Safari PCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. When you order from us, you’re getting a quality-tested module that has been professionally programmed with the latest GM-certified software updates. This process ensures that your vehicle operates with the most current calibrations for performance and emissions. By matching the software to your VIN, we ensure compatibility with all your vehicle’s systems and options, making installation straightforward.
Simple, VIN-Programmed Installation
The process is designed for both professional technicians and capable DIYers.
- Provide Your VIN: After placing your order, simply provide us with your 17-digit VIN. You can find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your registration/insurance documents.
- We Program It: Our technicians will flash the module with the correct software for your exact vehicle.
- Install the Module: Once you receive the part, disconnect your vehicle’s battery. Locate and swap your old PCM with the new one. Reconnect the battery.
- Security Relearn (If Necessary): In some cases, a simple security relearn procedure is required for the vehicle to recognize the new module. This can typically be done without special tools and instructions are widely available online or in service manuals.
Guaranteed Fitment for a Wide Range of GM Vehicles
This module is a direct replacement for part numbers 12589462, 12602801, and 89017749. It fits a large number of GM trucks, vans, and SUVs. Please verify your vehicle is on the list below to ensure proper fitment:
- Astro / Safari (GMC): 2005
- Avalanche 2500: 2005-2006
- Blazer S10 / Jimmy S15: 2005
- Cadillac CTS: 2004-2005 (V-Series)
- Express / Savana 1500, 2500, 3500 Vans: 2005-2007 (Gasoline engines)
- Silverado / Sierra 1500: 2005-2007 (Classic, 4.3L)
- Silverado / Sierra 2500 & 3500: 2005-2007 (Classic, 8.1L Gasoline)
- Suburban 2500 / Yukon XL 2500: 2005-2006 (8.1L)
Frequently Asked Questions
What is VIN programming?
VIN programming, or flashing, is the process of loading your vehicle’s specific software onto the module. This software is based on your 17-digit Vehicle Identification Number (VIN) and ensures the PCM works correctly with your engine, transmission, and options.
Do I need to do anything after installation?
In many cases, the vehicle will start and run perfectly after installation. Some GM vehicles may require a security relearn procedure (like Passlock or Passkey) for the anti-theft system to sync with the new PCM. This procedure can usually be done without any special tools.
Is this a plug-and-play part?
Yes, because we program it to your VIN before shipping, it is designed to be a direct, plug-and-play replacement. You simply swap the modules. The only additional step might be the security relearn mentioned above.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. Please double-check it for accuracy to ensure correct programming.
This module fits many vehicles. How do I know it’s right for mine?
The key is the part number. If your original module has one of the compatible part numbers (89017749, 12589462, 12602801) and your vehicle is on our fitment list, this is the correct part. The VIN programming makes it specific to your application.