Is Your GM Truck or SUV Experiencing Frustrating Engine Problems?
A failing Powertrain Control Module (PCM), the central computer of your vehicle, can be the hidden cause of numerous performance issues. If you’re dealing with a persistent check engine light, poor fuel economy, erratic shifting, or a no-start condition, your vehicle’s brain might be the culprit. This replacement PCM, part number 89017750, is the definitive solution to restore your vehicle’s reliability and performance. We take the guesswork and high dealership costs out of the equation by pre-programming this module specifically for your vehicle using your VIN.
From the Diagnostic Bay
We once had a 2005 Sierra 2500 come in that had its owner chasing his tail for weeks. He had replaced multiple sensors and even the fuel pump based on a handful of conflicting trouble codes. The truck would still intermittently stall and shift hard. After connecting our diagnostic equipment, we found that the PCM was intermittently dropping communication. The internal processor was failing, causing it to send faulty commands. Installing a correctly programmed PCM solved every single issue in one go. It’s a powerful reminder that sometimes the problem isn’t the sensors, but the computer reading them.
Diagnosing a Faulty 2003-2006 Yukon PCM
The PCM is the nerve center of your powertrain. When it begins to fail, it can manifest in ways that often mimic other component failures. Before you start replacing expensive sensors or parts, check if your vehicle is exhibiting any of the common symptoms of a bad engine computer. Getting the diagnosis right is the first step to a successful repair.
Common Symptoms of PCM Failure
- ✔ Unexplained Check Engine Light that may come and go.
- ✔ Engine stalling or idling roughly for no apparent reason.
- ✔ Harsh, erratic, or delayed transmission shifting.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Engine misfires, hesitation, or poor acceleration.
- ✔ The vehicle cranks but refuses to start (no-start condition).
- ✔ Failure to communicate with OBD-II scan tools.
- ✔ Inaccurate or non-functional dashboard gauges.
The Simple, Reliable Solution
Forget about expensive dealership visits and the hassle of finding a shop that can program a new module. We make the process straightforward. This PCM is a direct-fit replacement for a wide range of GM trucks and SUVs, including the GMC Yukon, Chevy Silverado, Cadillac Escalade, and Hummer H2. When you order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the module with the latest, most stable software updates from General Motors, ensuring it is perfectly matched to your vehicle’s specific configuration. This means it arrives at your door ready for installation.
This unit is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. By using a genuine, correctly programmed module, you ensure all powertrain components work in harmony as the manufacturer intended.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s primary computer. It manages the engine’s fuel injection, ignition timing, transmission shifting, and emissions systems to ensure peak performance and efficiency.
Do I need to program this module?
No. We handle all the programming for you before shipment. Just provide your vehicle’s VIN at checkout, and we will flash the unit with the latest GM software specific to your truck.
What is a CASE relearn and will I need to perform one?
CASE (Crankshaft Angle Sensor Error) relearn is a calibration procedure that syncs the new PCM with your engine’s crankshaft sensor. While many vehicles will start and run without it, it is often necessary to clear specific check engine light codes. Most local repair shops can perform this procedure in a few minutes with a capable scan tool.
Where can I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) is located on a metal tag on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle registration and insurance documents.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is straightforward. It typically involves disconnecting the battery, removing a few bolts holding the module, and carefully unplugging the large electrical connectors. The PCM is usually located in the engine bay, often near the battery or firewall.