Restore Peak Performance to Your GM Truck
Is your Sierra, Silverado, or Tahoe suffering from baffling electrical gremlins? A faulty Powertrain Control Module (PCM) is often the culprit behind frustrating issues like a persistent check engine light, poor engine performance, or even a no-start condition. As the central computer for your engine and transmission, its health is critical. This replacement PCM, part number 89017750, is the reliable, straightforward solution to get your truck back on the road and running like it should.
We take the guesswork and extra expense out of the repair. Unlike a blank module from a dealership that requires costly programming, this unit arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest, most stable software updates from GM, ensuring optimal performance and compatibility right out of the box. Simply provide your VIN after purchase, and we’ll handle the rest.
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Silverado 2500 with the 6.0L V8 that had an intermittent no-start and a random stalling problem that no one could solve. The truck would run fine for days, then suddenly die at a stoplight or refuse to start in the morning. There were no consistent trouble codes, just a generic U0100 (Lost Communication with ECM/PCM) that would pop up occasionally. After verifying the wiring harness, grounds, and power feeds were solid—a common issue on these trucks—I focused on the PCM. On the bench, I’ve seen dozens of these P59 controllers develop micro-fractures on the circuit board from years of heat cycles and vibration. We installed one of our VIN-programmed modules, performed a quick security relearn, and the truck has been running without a single hiccup for over a year. It’s a classic example of how a failing PCM can create ghost-like problems that a simple component swap can fix for good.
Is Your GM Truck Showing These Signs of PCM Failure?
A failing computer can manifest in many ways. If you’re experiencing any of the following, a faulty PCM is a likely cause. Look out for:
- âś” Check Engine Light is on with codes like P0601, P0602, P0606 (Internal Control Module errors).
- âś” Vehicle refuses to start or starts intermittently.
- âś” A significant drop in fuel economy.
- âś” Engine stalling, stuttering, or misfiring.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Failure to pass an emissions/smog test.
- âś” Communication errors with scan tools.
A Straightforward Guide to Your PCM Installation
This is a repair many DIYers and professionals can complete with basic hand tools. The key is our pre-programming, which eliminates the most complex step.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most compatible trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray in a black plastic bracket.
- Disconnect the Old Unit: Carefully unplug the electrical connectors. These connectors have locking tabs that need to be released—do not force them. Once unplugged, remove any bolts or clips holding the module in its bracket.
- Install the New PCM: Seat your new, pre-programmed PCM into the bracket and secure it. Reconnect the electrical harnesses, ensuring they click firmly into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Security Relearn Procedure: Your vehicle’s anti-theft system (PassLock/PassKey) may need to relearn the new PCM. This is a simple process: Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle 3 times. On the fourth try, the vehicle should start.
Verified Vehicle Compatibility List
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM vehicles, including:
- Cadillac Escalade, ESV, EXT (2003-2006)
- Chevrolet Avalanche 1500 (2003-2006)
- Chevrolet Silverado 1500, 2500, 3500 (2003-2007 Classic)
- Chevrolet SSR (2003)
- Chevrolet Suburban 1500, 2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- GMC Envoy XL / Chevrolet Trailblazer EXT (2003, 5.3L)
- GMC Sierra 1500, 2500, 3500 (2003-2007 Classic)
- GMC Sierra Denali (2003-2007 Classic)
- GMC Yukon, Yukon XL 1500, Yukon XL 2500 (2003-2006)
- Hummer H2 (2003-2007)
- Isuzu Ascender (2003, 5.3L)
Please verify your specific service number or contact us with your VIN to confirm perfect fitment.
How do I provide my VIN for programming?
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We will use this to load the correct GM-certified software for your truck’s specific configuration before we ship the part.
Is any additional programming required after installation?
No, the main engine and transmission software is fully programmed. However, you will likely need to perform a simple ‘Security Relearn’ procedure, which takes about 30 minutes using only your ignition key. In some cases, a Crankshaft Variation (CASE) relearn may be needed to turn off the check engine light, which requires a capable bidirectional scan tool.
Will this fix my specific problem?
This PCM is a direct solution for failures within the module itself, which commonly cause issues like no-start, stalling, and internal processor error codes (P0601, etc.). While it solves the majority of these problems, we always recommend a proper diagnosis to ensure other components like wiring, sensors, or fuel delivery are not the root cause.
Is this compatible with my 2007 ‘new body style’ truck?
No. This module is for the ‘Classic’ body style for the 2007 model year, which is identifiable by the creased door skin and more angular body lines carried over from the 2003-2006 models. It will not work with the ‘New Body Style’ (NBS) trucks introduced in 2007.