HPT GM E90 L84 & L87 PCM Upgrade (*Must Mail in PCM*)

If you're looking to unlock the full potential of your GM L84 or L87 engine, this PCM upgrade service from HP Tuners is a key step. This isn't just a simple plug-and-play device; it involves sending your existing Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), to HP Tuners for a specialized modification. This process is designed to prepare your PCM for custom tuning, allowing you to adjust parameters like fuel delivery, ignition timing, and transmission settings to better suit your specific needs, whether that's for improved performance, towing, or other modifications.

The service focuses on the GM E90 ECM, which is common in many modern GM trucks and SUVs equipped with the L84 (5.3L) and L87 (6.2L) V8 engines. By modifying your original PCM, HP Tuners ensures that the core computer controlling your engine is ready to accept advanced tuning strategies. This is a well-built solution for enthusiasts who want to go beyond factory limitations and tailor their vehicle's performance precisely. Remember, this service requires you to mail in your existing PCM; it is not a complete replacement unit.

Please be aware that this service is not CARB approved and cannot be shipped to California. It's essential to check local emissions regulations before purchasing. Once your PCM is modified, you'll be able to work with a tuner to realize the full benefits of your engine's capabilities.