About This Product
Ultimate GM 450HP Truck Tune
This is the Ultimate GM 450HP pre-written tune file, built from a real-world cammed LS truck combo and refined for Gen III and Gen IV GM trucks. If your truck is running a rowdy cam, long tubes, intake upgrades, and you want it to start clean, idle mean, and pull hard, this file is built for that kind of setup.
Built Around a Proven 450HP Combo
The demo truck used to develop this file is a real street build, not a guessed calibration.
- Sloppy Mechanics Stage 3 Camshaft
- TBSS Intake Manifold
- Cold Air Intake
- Long Tube Headers
- High-Flow Y-Pipe & Free-Flowing Exhaust
- Full Engine Tune AND Transmission Tune Included
What This Tune Delivers
- Aggressive, consistent 450HP-capable calibration
- Clean cold start with controlled cam chop once warm
- Helps fix bucking, surging, stalling, and poor idle behavior
- Sharper throttle response without making the truck jumpy
- Optimized spark, fueling, airflow, and torque management
- Transmission tuning that firms up shifts without abusing the drivetrain
Compatibility
- GM Gen III & Gen IV LS trucks — 4.8L / 5.3L / 6.0L
- Silverado / Sierra 1500 & HD
- Tahoe, Suburban, Yukon, Denali, Avalanche, Escalade
- Best suited for big-cam, full bolt-on LS truck builds
Requirements
- HP Tuners MPVI2 / MPVI3 / MPVI4 or EFI Live interface
- HP Tuners credits or EFI Live licenses — not included
- Windows laptop with VCM Suite or EFI Live software
- Ability to read, save, email, and flash your tune file
What We Need From You
- After purchase, email your HP Tuners or EFI Live factory read file to Tunes@JRJonesRacing.com
- Include your order number and full mod list — cam, intake, headers, exhaust, injectors, converter, etc.
- Confirm your engine size and transmission type
- Typical turnaround can be fast, but allow up to 24 hours depending on workload
- Up to 3 revisions included if your setup needs follow-up adjustments
Flashing & Safety Notice
Flashing a PCM or TCM always carries risk if done incorrectly. Protect your hardware and follow safe flashing practices.
- Never flash over Bluetooth or Wi-Fi — use a hard-wired USB connection only
- Connect a battery charger to maintain stable voltage during the write process
- Do not cycle the key, unplug cables, or move the laptop during the write
J.R. Jones Automotive & Performance is not liable for PCM/TCM damage caused by unsafe flashing practices, unstable voltage, interrupted writes, or hardware failures.
Need Help Sending Your Tune File?
Watch the step-by-step video showing how to read your stock file with HP Tuners and email it in for calibration.
