Is Your GM Truck Running Rough? Restore Its Brainpower.
If your Silverado, Sierra, Tahoe, or other GM truck from 2003-2007 is experiencing frustrating issues like stalling, erratic shifting, poor fuel economy, or a persistent Check Engine Light, the problem often lies with a failing Powertrain Control Module (PCM). The PCM is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shift points. When it starts to fail, it can cause a cascade of problems that are difficult to diagnose and can leave you stranded.
This replacement PCM, part number 89017734, is the definitive solution to get your truck back on the road and running like it should. We take the guesswork and hassle out of the repair process. Unlike sourcing a part from a junkyard or a dealership, this module comes pre-programmed specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the unit with the latest, most stable GM factory software updates for your exact make and model. This ensures optimal performance, fuel efficiency, and emissions compliance right out of the box.
From the Diagnostic Bay
We had a 2005 Silverado 2500 with the 6.0L come in that was driving the owner crazy. It had an intermittent no-start condition that never happened at the shop. He’d replaced the battery, alternator, and even the crank sensor, but the problem persisted. After checking all the wiring and grounds, we hooked up our diagnostic scanner during a test drive and monitored the PCM data. We noticed the 5-volt reference signal would occasionally drop out for a split second, just before the engine would stumble. This pointed directly to an internal failure in the PCM. We installed one of our pre-programmed units, performed the security relearn, and the truck has been starting reliably ever since. It’s often the component you least suspect that’s causing the biggest headache.
Symptoms of a Failing GM PCM
- ✔ Check Engine Light is on with various communication or sensor-related codes (e.g., U-codes, P0601-P0606).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass an emissions test.
- ✔ Other modules, like the ABS or BCM, may report a loss of communication with the PCM.
Why Choose Our GM Truck PCM 89017734?
This isn’t just a replacement part; it’s a comprehensive solution. A faulty PCM can mimic a dozen other problems, leading to expensive and unnecessary repairs. By choosing our pre-programmed module, you are getting a reliable component that eliminates the most complex part of the job: the software. The dealership can charge hundreds for programming alone. Our service is included, saving you significant time and money. This module is a direct-fit replacement for service numbers 89017750, 12582605, 12589463, 12602802, and 28042802, ensuring wide compatibility across the GM truck and SUV lineup, including the Escalade, Hummer H2, Avalanche, Suburban, and more.
Installation is straightforward for any competent DIY mechanic or professional technician. Once the new module is installed, you will need to perform a simple security relearn procedure (often called a CASE relearn or anti-theft relearn), which pairs the new PCM to your vehicle’s keys. This procedure typically takes 10-30 minutes and does not require any special tools. Instructions are widely available online or in service manuals.
Frequently Asked Questions
Do I need to send my old PCM in?
No, there is no core charge or need to send your original module to us. This is a direct purchase.
Is this part difficult to install?
The physical installation is typically easy, involving disconnecting the battery, unplugging a few connectors, and unbolting the module. The most critical step after installation is the security relearn procedure, which is required for the vehicle to start.
What happens if I don’t provide my VIN?
We cannot ship the module until we have your VIN. The programming is essential for the part to function in your vehicle. Please provide your 17-digit VIN during or after checkout to avoid delays.
Will this fix my specific problem?
This PCM resolves issues directly caused by a faulty module. While the symptoms listed are common indicators of PCM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the PCM is the root cause before ordering.
What is a security relearn procedure?
It’s a simple process that syncs the new PCM with your vehicle’s anti-theft system. It usually involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Your vehicle will not start until this is completed.