Restore Peak Performance to Your 2003 GMC Yukon XL 2500
If your truck is suffering from erratic behavior like stalling, harsh shifting, a persistent check engine light, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As the brain of your vehicle’s engine and transmission, its proper function is non-negotiable. This replacement PCM, part number 89017733, is the definitive solution to get your vehicle running reliably again. We take the guesswork and hassle out of the repair by pre-programming the module with the latest GM software updates, tailored specifically to your vehicle’s VIN.
From the Diagnostic Bay: A Common GM Truck Scenario
I remember a 2003 Silverado with the 8.1L—same family as your Yukon—that came into my shop on a tow truck. The owner had replaced plugs, wires, and even a coil pack trying to chase down a random misfire and stalling issue. His scanner showed a P0601 (Internal Control Module Memory Check Sum Error). This code is a dead giveaway. The internal memory of the factory PCM had failed. We installed one of these VIN-programmed modules, performed the security relearn, and the truck fired right up and ran smoother than it had in years. This isn’t just a part; it’s a solution that saves you from chasing ghosts in the electrical system.
Is Your Truck Showing These Red Flags?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U-series communication codes.
- ✔ Engine cranks but refuses to start.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test due to module-related errors.
A Straightforward Guide to Swapping Your PCM
Replacing the PCM on these GM trucks is a manageable job for a DIYer. Our pre-programming service eliminates the most difficult step, saving you a trip to the dealership. Follow these general steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most 2003 GM trucks and SUVs like the Yukon, the PCM is located under the hood on the driver’s side, often under or near the battery tray.
- Disconnect the Harnesses: Carefully unclip and remove the electrical connectors from the old module. These connectors have locking tabs that need to be released before pulling.
- Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed PCM into the bracket and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn: This is a critical step. You will need to perform a security relearn procedure (often called a ‘key-on’ relearn) to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. Your vehicle will not start until this is completed.
Verified Vehicle Compatibility
This module is a direct replacement for service number 89017733 and other compatible numbers. It is guaranteed to fit the following vehicles and configurations. Please verify your vehicle is on this list before ordering.
- Avalanche 2500: 2003 (LH front under battery)
- Astro / Safari (GMC): 2003 (LH front by battery)
- Blazer S10 / Jimmy S15: 2003 (RH front engine compartment)
- Corvette / CTS (Cadillac): 2004 (Base, ID 12581565)
- Express / Savana Van (1500/2500/3500): 2003 (LH rear engine compartment)
- S10 / S15 / Sonoma Pickup: 2003 (4.3L, RH front engine compartment)
- Sierra / Silverado Pickup (1500): 2003 (4.3L, LH front under battery)
- Sierra / Silverado Pickup (2500/3500): 2003 (Gasoline 8.1L, LH front under battery)
- Suburban 2500: 2003 (8.1L, LH front under battery)
- Yukon XL 2500: 2003 (8.1L, LH front under battery)