Programmed 2003 SSR PCM 28042802 | Powertrain Control Module | VIN Flashed

Restore Peak Performance to Your GM Vehicle

If you’re dealing with a frustrating check engine light, erratic engine behavior, or a no-start condition on your 2003 Chevrolet SSR or other compatible GM truck, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine, its proper function is critical. This replacement PCM, part number 28042802, is the definitive solution to get your vehicle running reliably again. We take the guesswork and hassle out of the repair by programming the module specifically to your vehicle’s VIN before it ships. This ensures it arrives ready for a straightforward installation, loaded with the latest GM factory software updates to correct known drivability issues.

Is Your Vehicle Showing These Telltale Signs?

A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:

• ✔ Persistent Check Engine Light (CEL)
• ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0602, P0606
• ✔ Communication error codes like U0100 (Lost Communication With ECM/PCM)
• ✔ Unexplained drop in fuel economy
• ✔ Harsh or erratic automatic transmission shifting
• ✔ Engine stalling, stumbling, or refusing to start
• ✔ Failure to pass state emissions testing

A Straightforward Guide to Your PCM Installation

Replacing the PCM on these GM vehicles is a job most DIYers can handle. The key is our pre-programming service, which eliminates the need for expensive dealer tools. While specific steps may vary slightly by model, here is a general guide.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. Locate the PCM: On most compatible trucks and SUVs (Silverado, Sierra, Tahoe), the PCM is located on the driver’s side of the engine bay, under the battery tray. For the 2003 SSR, Trailblazer EXT, and Envoy XL, you’ll find it next to the air filter box.
3. Disconnect the Connectors: Carefully unclip and remove the electrical wiring harness connectors from the old PCM. These connectors are often color-coded and have locking tabs that need to be released.
4. Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you will reuse it.
5. Install the New Module: Mount your new, pre-programmed PCM onto the bracket and secure it with the original hardware.
6. Reconnect Everything: Firmly plug the wiring harness connectors into the new module. You should hear a ‘click’ as they lock into place. Reconnect the negative battery terminal.
7. Perform Security Relearn: You will likely need to perform a Vehicle Anti-Theft System (VATS) relearn procedure. This simple process typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows your vehicle’s security system to recognize the new PCM.

Verified Vehicle Compatibility

This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM models. Please verify your vehicle is on this list: