Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or Ascender suffering from mysterious electrical issues, a persistent check engine light, or poor engine performance? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your vehicle’s engine and transmission. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This replacement GM PCM 89017734 is the definitive solution to get your vehicle running reliably again.
This isn’t just a used part pulled from a junkyard. Each module is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. We load the latest, most stable software updates directly from GM, which often resolve factory bugs and improve drivability, fuel economy, and emissions performance. This ensures a seamless integration with your vehicle’s existing systems, making installation straightforward for both DIY mechanics and professional technicians.
From the Diagnostic Bay
We had a 2005 Silverado 1500 in the shop with an intermittent no-start condition that was driving the owner crazy. He had already replaced the battery, alternator, and starter to no avail. The truck would crank but wouldn’t fire, and then an hour later, it would start perfectly. After hours of chasing wires, we hooked up a scope to the PCM’s ignition control driver. We found that the driver circuit inside the original PCM was failing when it got hot, cutting the signal to the coils. We installed a VIN-programmed module, performed the security relearn, and the truck has been starting reliably ever since. It’s a classic case where the “brain” was the problem, not the components it controls.
Is Your GM PCM 89017734 Failing?
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty engine computer could be the culprit. This module is the correct fix for a wide range of GM trucks and SUVs, including the 2003 Isuzu Ascender, Chevy Avalanche, Cadillac Escalade, and many more.
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0606, or communication errors (U-codes).
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Intermittent or complete no-start condition where the engine cranks but won’t fire.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Failure to communicate with diagnostic scan tools.
- ✔ Other seemingly unrelated electrical issues appearing and disappearing.
The VIN Programming Advantage
Ordering a PCM for a modern vehicle isn’t as simple as matching a part number. The module must be correctly configured for your vehicle’s specific options, emissions, and security system. Our process eliminates the guesswork and the need for expensive dealership programming. Simply provide us with your VIN during checkout, and we handle the rest. Your new GM PCM 89017734 will arrive ready to be installed, requiring only a simple security relearn procedure that you can perform yourself in your driveway—no special tools required.
This module is a direct replacement for several service numbers, including: 89017750, 12582605, 12589463, 12602802, and 28042802. Please verify compatibility with the extensive list of makes and models provided.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before we ship it. This saves you the time, hassle, and expense of a trip to the dealership.
How do I provide my VIN?
After you complete your purchase, we will send you an email requesting your vehicle’s 17-digit VIN. You can also add it to the notes section during checkout. We cannot ship your part until we have this information.
Is this part truly plug-and-play?
It is pre-programmed, but you will need to perform a security relearn procedure after installation. This syncs the new PCM with your vehicle’s anti-theft system and is required for the engine to start. This procedure typically takes 10-30 minutes and does not require any special tools.
What if my original part number is different from 89017734?
This module replaces several different service numbers. Please check the list of compatible numbers (89017750, 12582605, 12589463, etc.) provided in the description. As long as your original number is on that list, this part is the correct replacement.
Will this fix my vehicle’s problem for sure?
If your vehicle has been properly diagnosed with a faulty PCM, this part is the solution. It will resolve issues directly caused by the computer, such as internal processor faults (P0601) or communication errors. It will not fix issues related to other faulty sensors or wiring.