Verified customer reviews
This tune file is built for 1998-2006 GM LS truck, SUV, and performance platforms running 4.8L, 5.3L, 5.7L, or 6.0L combinations with a Texas Speed Chopacabra camshaft or similar LS cam setup.
This is made for customers who want the aggressive Chopacabra idle, but still want the vehicle to start clean, idle right, drive smooth, and behave on the street. Send your factory read file and full mod list, and we build the calibration around your exact setup.
This is not a random pulled file. Your tune is built around your factory read file, operating system, engine size, transmission, cam setup, converter, gear ratio, tire size, and full modification list. We tune, test, log, revise, and communicate until the file is working the way it should for your supported setup.
The Chopacabra cam can deliver the idle people want, but the tune is what makes the vehicle actually enjoyable. These GM LS platforms need startup, airflow, fueling, spark, idle control, and transmission behavior corrected so the vehicle does not stall, surge, buck, or fight you in traffic.
These vehicles are commonly supported in the 1998-2006 GM LS tuning family when equipped with supported 4.8L, 5.3L, 5.7L, or 6.0L combinations.
This is a performance calibration designed for modified GM LS vehicles running a camshaft and supporting parts.
You are responsible for making sure your build quality is up to par before flashing or running this tune. Your engine, valvetrain, fuel system, drivetrain, wiring, sensors, injectors, exhaust, and all supporting parts must be correctly installed, mechanically sound, and capable of handling increased performance.
Poor installation, worn parts, incorrect valve spring setup, wrong pushrod length, weak fuel supply, vacuum leaks, exhaust leaks, bad sensors, or unsafe mechanical condition can cause drivability issues or engine damage that no tune can fix.
J.R. Jones Automotive & Performance is not liable for engine failure, drivetrain damage, PCM/ECU damage, or any issue caused by poor build quality, improper installation, unsafe flashing practices, incorrect customer-supplied information, or misuse of this tune.
Always flash using a hard-wired USB connection. Do not flash over weak connections, unstable power, or while the vehicle battery is low.
Use a battery charger or maintainer during the write process. Do not interrupt the flash once writing has started.
Customer is responsible for having the proper tuning hardware, software, licensing, and stable equipment needed to read and flash the vehicle.
If your Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, Camaro, Firebird, Corvette, GTO, CTS-V, or TrailBlazer SS has injectors, converter changes, gear/tire changes, boost, nitrous, or anything beyond a normal Chopacabra cam setup, use the Build Your Tune page so we can match the calibration to your exact vehicle.
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