Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from perplexing issues like a persistent check engine light, erratic shifting, or a no-start condition? The Powertrain Control Module (PCM), often called the vehicle’s brain, is the central command unit responsible for managing the engine, transmission, and dozens of other critical systems. When it fails, it can cause a cascade of problems that are frustrating and difficult to diagnose. This replacement PCM, part number 89017734, is the definitive solution to restore your vehicle’s factory performance and reliability.
Is Your Vehicle Showing Signs of a Failing PCM?
A faulty PCM can manifest in numerous ways, often mimicking other component failures. Before spending hundreds on sensors or transmission work, check if your vehicle is exhibiting these common symptoms of PCM failure:
- ✔ Persistent Check Engine Light: You may see codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (PCM Processor Fault), or communication errors (U-codes).
- ✔ Engine Performance Problems: Unexplained stalling, rough idling, misfires, or a sudden drop in fuel economy can all point to a faulty computer.
- ✔ Transmission Shifting Issues: Harsh, delayed, or erratic shifting between gears is a classic sign that the PCM is not correctly communicating with the transmission control module.
- ✔ Intermittent or No-Start Condition: If your truck or SUV cranks but refuses to start, or only starts sometimes, the PCM may not be properly controlling the fuel or spark delivery.
- ✔ Inaccurate Instrument Panel Readings: Gauges behaving erratically or providing false information can sometimes be traced back to the main computer.
- ✔ Failed Emissions Test: A malfunctioning PCM can prevent the engine from running efficiently, leading to an automatic failure at the emissions station.
From the Diagnostic Bay
We had a 2006 Sierra 1500 towed in that was a classic “crank, no-start.” The owner had already replaced the fuel pump and crank sensor with no luck. Our initial scan showed no communication with the PCM. After verifying all power and ground circuits to the module were good, we knew the internal processor had failed. We installed one of our VIN-programmed PCMs, performed the quick 10-minute security relearn, and the truck fired up on the first try. It’s a common failure point on these vehicles, and having a correctly programmed module is the key to a fast, effective repair.
The Superior Solution: A VIN-Programmed GM Truck PCM 89017734
Don’t settle for a generic, unprogrammed module from a salvage yard that will require expensive dealership tools to configure. Our process is designed for a seamless, straightforward installation. When you order, you provide us with your vehicle’s 17-digit VIN. Our technicians then use that information to flash the module with the latest, most stable GM-certified software specific to your truck’s engine, transmission, and options. This ensures that your vehicle operates exactly as the manufacturer intended, with optimal fuel efficiency, emissions control, and transmission performance.
This module is a direct replacement for a wide range of service numbers, including 89017750, 12582605, 12589463, 12602802, and 28042802. By programming it to your VIN, we ensure 100% compatibility and function.
Installation and Security Relearn
Replacing the PCM is typically a simple mechanical process. It’s located in the engine bay, usually on the driver’s side near the battery or airbox. After disconnecting the battery and swapping the module, you will need to perform a security relearn procedure. This allows the new PCM to synchronize with your vehicle’s anti-theft system and keys. For most GM vehicles of this era, this is a simple procedure that takes about 30 minutes and does not require any special tools. Instructions are readily available online or in service manuals.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. The main benefit of our service is that we program the module for you before it ships. Simply provide your vehicle’s VIN during or after checkout, and it will arrive ready for installation and the security relearn procedure.
What is a security relearn and is it difficult?
A security relearn (also known as a Passlock or anti-theft relearn) synchronizes the new PCM with your vehicle’s keys. For most 2003-2007 GM trucks, it involves a series of key turns in the ignition over a 30-minute period. It’s a simple process that does not require a mechanic or special scan tools.
Where is my VIN located?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Is this a direct replacement for my original part?
Yes, this module is a direct-fit replacement for part number 89017734 and several other compatible service numbers. As long as your vehicle is on the compatibility list, this VIN-programmed module will function correctly.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN, as the programming is essential for the part to work in your vehicle. Our customer service team will contact you to retrieve the VIN before we can process and ship your module.