Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2006 GMC Yukon, Sierra, or other GM truck plagued by frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM) is often the hidden culprit behind problems that can sideline your vehicle. As the brain of your engine and transmission, a failing PCM can cause everything from a simple check engine light to a no-start condition that leaves you stranded. This direct-replacement PCM, part number 89017750, is the reliable solution to restore your vehicle’s original performance and dependability.
We take the guesswork and high cost out of the repair process. Unlike a generic module from a parts store, each unit is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN. This means it arrives at your door ready for installation, eliminating the need for an expensive trip to the dealership for programming. This is the definitive fix for many common electronic gremlins that mechanics often chase for hours.
Case Study: A Tricky Diagnosis
I remember a 2005 Chevy Tahoe that came into my shop with an intermittent stalling problem and a persistent P0601 (Internal Control Module Memory Check Sum Error) code. The owner had already replaced the crank sensor and a few other parts with no luck. The truck would run fine for days, then suddenly die at a stoplight. After verifying power and grounds to the PCM were solid, we knew the internal processor was failing. We installed one of these VIN-programmed modules, performed the security relearn, and the problem was solved permanently. It’s a classic example of how a failing 2003-2006 Yukon PCM can mimic other component failures.
Is Your GM Truck Showing These Signs of PCM Failure?
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty PCM could be the cause:
- âś” Check Engine Light is on with communication codes (like U0100) or internal processor codes (P0601, P0602, P0606).
- âś” The engine cranks but refuses to start.
- âś” Unexplained stalling or rough idling, especially when warm.
- âś” A noticeable drop in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Apparent loss of spark or fuel injector pulse.
A Straightforward Guide to Your PCM Replacement
Installing your new 2003-2006 Yukon PCM is a manageable job for a confident DIYer. While specific steps may vary slightly by model, the general process is consistent for most compatible trucks and SUVs.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these GM trucks (like the Silverado, Sierra, and Tahoe), the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.
- Disconnect the Module: Carefully unplug the electrical harness connectors. These connectors have locking tabs that must be released before they can be pulled free. Avoid forcing them.
- Remove the Old PCM: Unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will likely need to perform a simple security relearn procedure so the vehicle recognizes the new module. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Verified Compatibility for Your GM Truck or SUV
This module is a direct replacement for service number 89017750 and is also compatible with numbers 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of popular GM vehicles, including:
- âś” 2003-2006 GMC Yukon / Yukon XL
- âś” 2003-2007 Chevrolet Silverado / GMC Sierra (1500, 2500, 3500)
- âś” 2003-2006 Chevrolet Tahoe / Suburban
- âś” 2003-2006 Cadillac Escalade (ESV, EXT)
- âś” 2003-2007 Hummer H2
- âś” And many more models listed in the fitment chart.
To ensure a perfect match, please provide your vehicle’s VIN at checkout. This allows us to program the 2003-2006 Yukon PCM with the correct software for your specific engine, transmission, and options.
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to access the exact GM factory software for your truck’s specific configuration. This includes engine size, transmission type, gear ratios, and tire size. Programming the PCM with your VIN ensures all systems operate exactly as intended by the manufacturer.
Is this a simple plug-and-play installation?
Yes, for the most part. The module is programmed to your VIN before shipping. After physical installation, you will need to perform a standard GM Security Relearn Procedure, which takes about 30 minutes and requires only the vehicle’s key. This syncs the new PCM with your vehicle’s anti-theft system.
What is the difference between a PCM and an ECM?
The terms are often used interchangeably. ECM (Engine Control Module) typically just controls engine functions. A PCM (Powertrain Control Module) is more integrated and controls both the engine and the transmission. For these GM trucks, the correct term is PCM, as this one unit manages both.
Will this fix my P0601 code?
Yes. Diagnostic Trouble Code P0601 (Internal Control Module Memory Check Sum Error) is a terminal code indicating the internal processor of your original PCM has failed. Replacing the module is the only correct and reliable repair for this specific code.
Do I need to send my old module back?
No core charge is required for this part. You can keep or recycle your old module without needing to return it to us.