Description
GM Mail-Order Performance Tune Service (1996+)
Custom ECM / PCM Tuning for Daily Driven GM Vehicles
Send us your GM ECM/PCM and we will modify the calibration to improve power, throttle response, drivability, and overall performance. This service is designed for daily driven vehicles with common bolt-on modifications including cold air intake, long tube headers, and cat-back exhaust systems.
As long as your vehicle is supported by HP Tuners, we can develop a custom tune for it. You can check the official supported vehicle list here:
https://www.hptuners.com/vehicles/gm-tuning/
What This Service Includes
- Custom ECM/PCM calibration tailored to your vehicle
- Optimized ignition timing and fueling
- Improved throttle response and drivability
- Power enrichment and torque management optimization
- Transmission shift improvements (when supported)
- Support for common bolt-on modifications
Optional Settings Available by Request
These settings can be adjusted during the tune if requested:
- VATS (Vehicle Anti-Theft System) delete
- DOD / AFM / DFM disable
- Electric fan enable or temperature adjustment
- Speed governor removal
- DTC disable for unused components
- Differential gear ratio adjustment
- Tire size correction
Gear ratio and tire size changes can usually be corrected through tuning, but results may vary depending on the vehicle. In some cases we may recommend upgrading to a remote tuning session to perfectly dial in the calibration.
Camshaft Upgrades
We can provide a base startup tune for many Stage 1 and Stage 2 camshaft upgrades. However, cam combinations vary significantly, so please contact us before ordering to confirm compatibility.
In some cases we may recommend upgrading to a remote tuning package for best results.
Vehicle Compatibility
This service supports 1996 and newer GM vehicles as long as they are supported by HP Tuners.
Popular applications include:
- Silverado / Sierra
- Corvette
- Camaro
- Tahoe / Yukon
- Escalade
- Avalanche
- Colorado
- Trailblazer SS
- Cadillac ATS / CTS / CT4 / CT5
- Pontiac G8
- Cobalt SS
- And many more GM vehicles
We have tuned nearly every make and model of GM vehicle over the years.
Exclusions
This mail-order tuning service does not include newer GM vehicles that require more than 4 HP Tuners credits, such as certain encrypted platforms including:
- 2021.5+ Silverado / Sierra
- C8 Corvette
- Cadillac Blackwing platforms
- Other late-model encrypted GM controllers
If your vehicle requires advanced unlock procedures or higher credit licensing, we will contact you with available options.
How Mail-Order Tuning Works
- Place your order through this page.
- Remove the ECM/PCM from your vehicle.
- Ship it to our shop with your order number and contact information.
- We modify the calibration and test the file.
- Your ECM/PCM is returned ready to install.
Typical turnaround time is 1–3 business days after we receive your ECM.
Ship To:
PCM Tuners
367 N Clarendon Ave, Unit 7
Scottdale, GA 30079
Fast • Reliable • Experienced with Thousands of Successful GM Tunes
