Is Your GM Truck or SUV Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic shifting, a no-start condition, or random stalling in your 2003-2006 Escalade, Sierra, or Tahoe, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, when the PCM goes bad, it can create a cascade of problems that are often misdiagnosed. I’ve spent two decades in the shop, and I’ve seen drivers replace perfectly good sensors and fuel pumps, only to find the root cause was the PCM all along.
This isn’t just a replacement part; it’s a complete solution. We take the guesswork out of the repair by programming this module specifically for your vehicle using your VIN. This ensures it has the latest GM software updates and communicates perfectly with all other systems in your truck, right out of the box.
A Mechanic’s Real-World Experience
“A customer’s 2005 Escalade came in last week with these exact symptoms: it would crank but not start, and when it did, it shifted hard between first and second gear. The diagnostic scanner was throwing a dozen conflicting codes. Instead of chasing ghosts, we went straight to the source. After confirming power and ground at the PCM connectors, we installed one of our pre-programmed units. The truck fired up instantly, all codes cleared, and it drove off the lift shifting as smoothly as it did new. This is the fix that works.”
Why Choose Our Pre-Programmed 2003-2006 Escalade PCM?
Getting your vehicle back to factory-spec performance is our priority. This module is the definitive answer to complex electronic issues.
- โ VIN-Specific Programming: We flash the module with the latest GM calibrations for your exact vehicle. Just provide your VIN at checkout.
- โ Eliminates Drivability Problems: Solves common symptoms like harsh shifting, poor fuel economy, stalling, and false diagnostic trouble codes (DTCs).
- โ No Dealership Required: This module arrives ready for installation, saving you a costly trip to the dealer for programming.
- โ Direct OEM Replacement: Guaranteed to fit and function correctly, replacing a wide range of original service numbers.
Plug-and-Play Installation: Get Back on the Road Fast
You don’t need to be a master technician to install this part. In most compatible vehicles like the Silverado, Suburban, and Hummer H2, the process is straightforward.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most GM trucks and SUVs from this era, it’s found in the engine bay on the driver’s side, often under or next to the battery tray.
- Disconnect the Harnesses: Carefully lift the locking tabs and unplug the wiring connectors from the old module. Inspect the pins for any green or white corrosion.
- Swap the Modules: Unbolt the old PCM from its bracket and secure the new one in its place.
- Reconnect and Secure: Plug the wiring harnesses firmly into the new PCM and lock the tabs. Reconnect your battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple key-cycle security relearn procedure. This takes about 30 minutes and allows the vehicle’s anti-theft system to recognize the new PCM. Instructions are readily available online for your specific model.
Expert Pro Tip: Check for Leaks!
Before installing your new PCM, take a close look at the battery and the metal tray it sits on. I’ve seen dozens of these PCMs fail because of a slow, unnoticed acid leak from a cracked battery. The acid drips down and corrodes the PCM’s case and connectors. Cleaning the area and ensuring your battery is in good health can prevent a repeat failure down the road.
Guaranteed Compatibility
This module is a direct replacement for GM service part numbers: 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your part number or contact us with your VIN to confirm fitment for your specific GM, Chevrolet, Cadillac, Hummer, or Isuzu vehicle.