Get Your GM Truck Back on the Road, Fast.
Is your Escalade, Sierra, or Tahoe suffering from frustrating and unpredictable issues? Stalling at intersections, erratic shifting, a persistent check engine light, or a complete no-start condition can all point to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s a loss of the reliability and power you depend on. This replacement PCM is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind. We take care of the most critical step: each unit is professionally programmed to your vehicle’s specific VIN with the latest GM factory updates before it ships. This ensures a seamless installation and restores the precise communication between your engine and transmission.
Common Symptoms & Your Solution
A failing PCM can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing any of the following, a faulty module is a likely culprit:
- Check Engine Light: Particularly for internal module error codes like P0601, P0602, or P0606.
- Engine Performance Issues: Unexplained misfires, poor fuel economy, stalling, or hesitation.
- Transmission Problems: Harsh or delayed shifting, or failure to shift into certain gears.
- No-Start Condition: The engine cranks but won’t start, often due to a lack of fuel injector or ignition coil command from the PCM.
- Communication Errors: Your scan tool cannot communicate with the PCM.
This pre-programmed Escalade EXT PCM 12602802 is the direct answer to these problems, engineered to restore the factory-level function your vehicle has lost.
Features & Benefits
- ✔ Plug & Play Installation: Arrives programmed to your specific VIN. In most cases, this eliminates the need for an expensive trip to the dealership for programming.
- ✔ Latest GM Software: We flash the module with the most current GM calibrations, which can resolve underlying drivability issues and improve overall performance and efficiency.
- ✔ Guaranteed Compatibility: A direct replacement for service number 12602802 and a wide range of other compatible part numbers for a perfect fit and function.
- ✔ Restores Peak Operation: By correcting command signals to the engine and transmission, this module ensures your vehicle runs smoothly, powerfully, and efficiently.
- ✔ Complete Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight from the Shop Floor
“We see these GMT800-platform trucks in the shop constantly. A common mistake is chasing individual sensors when the root cause is the PCM itself. The brain is failing. What makes this solution so effective isn’t just that it’s a quality replacement part, but that it’s programmed correctly before it gets to you. A blank module is just a paperweight. By flashing it with the latest GM updates for your specific VIN, we’re often fixing issues the owner didn’t even know were software-related, like subtle transmission shift-feel problems or fuel trim irregularities. You’re not just replacing a broken part; you’re giving your truck’s entire powertrain a fresh start.”
Don’t let a faulty computer keep your capable truck or SUV parked. This is your opportunity to fix it right the first time. By providing your VIN upon purchase, you ensure that the Escalade EXT PCM 12602802 you receive is perfectly matched to your vehicle’s systems, from the engine and transmission to the specific options it was built with. This attention to detail is crucial for a successful and lasting repair.
Frequently Asked Questions
Do I need to do any programming after I install this PCM?
No. We program the module to your vehicle’s VIN before shipping. However, you will need to perform a security relearn procedure (often called a VATS relearn) which can typically be done without special tools and takes about 30 minutes. Instructions are readily available online for your specific model. Some vehicles may also require a Crankshaft Position Sensor (CASE) relearn, which requires a capable scan tool.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. Please double-check it for accuracy to ensure a perfect match.
Is this compatible with other part numbers?
Yes. This PCM, service number 12602802, is a direct replacement for several other service numbers including 89017750, 12582605, 12589463, and 89017734. Please check the full compatibility list to confirm it fits your specific vehicle.
What if my original part number is not on the list?
If your original part number is not listed, please contact us with your VIN before ordering. GM used many different part numbers for these vehicles, and we can help you verify that you are ordering the correct, compatible module.
Where is the PCM located on my vehicle?
On most of the compatible models like the Escalade, Silverado, and Tahoe, the PCM is located in the engine bay on the driver’s side, under or next to the battery and mounted to the inner fender.