About This Product
1998-2006 Silverado / Sierra LS Cam Tune File
This tune file is built for 1998-2006 GM LS truck and SUV platforms using the 4.8L, 5.3L, or 6.0L engine family.
If you have a BTR Truck Norris, Texas Speed Chopacabra, or similar LS truck cam in one of these trucks or SUVs, this tune will work for you. Send your factory read file and full mod list, and we will 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, and full modification list. Most setups take 3-5 revisions, and we finish the tune instead of leaving you stuck after one file.
Built for 1998-2006 GM LS Truck Cam Setups
These Gen III GM trucks respond great to a good camshaft, but the tune matters. A cammed 4.8L, 5.3L, or 6.0L truck needs the airflow, idle, fueling, spark, and transmission behavior corrected so it starts clean, idles right, drives smooth, and does not fight you at every stoplight.
- Built for 1998-2006 Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, and Hummer H2 platforms
- Designed for BTR Truck Norris, Texas Speed Chopacabra, or similar LS truck cams
- Supports common bolt-ons like headers, cold air intake, exhaust, and intake manifold upgrades
- Built from your actual factory read file, not a one-size-fits-all upload
- 3-5 revisions included as needed to finish the calibration
- Requires HP Tuners hardware and credits for flashing
Cam Compatibility
- BTR Truck Norris
- Texas Speed Chopacabra
- Similar LS truck camshafts with cam specs or full build details provided
What This Tune Covers
- Startup, idle, airflow, fueling, spark, and drivability calibration
- Cammed truck idle control for cleaner startup and less stalling
- Throttle response and part-throttle drivability
- Transmission tuning support where applicable
- Common bolt-ons including headers, intake, exhaust, and manifold swaps
- 3-5 revisions included because real tuning takes what it takes
Compatible GM Trucks And SUVs
These vehicles share the 1998-2006 GM truck/SUV LS platform family when equipped with supported 4.8L, 5.3L, or 6.0L engine combinations.
- Chevrolet Silverado 1500
- GMC Sierra 1500
- Chevrolet Silverado 2500 / 3500 gas LS applications
- GMC Sierra 2500 / 3500 gas LS applications
- Chevrolet Tahoe
- GMC Yukon
- GMC Yukon XL
- Chevrolet Suburban 1500 / 2500
- Chevrolet Avalanche
- Cadillac Escalade
- Cadillac Escalade ESV
- Cadillac Escalade EXT
- Hummer H2
- 2006 Chevrolet TrailBlazer SS
Engine Coverage
- 4.8L LR4 Gen III LS truck engine
- 5.3L LM7 / L59 Gen III LS truck engines
- 6.0L LQ4 / LQ9 Gen III LS truck and SUV engines
- 6.0L LS2 TrailBlazer SS support where applicable
What We Need From You
- Email your HP Tuners factory read file to Tunes@JRJonesRacing.com
- Include your order number
- Include year, make, model, engine size, and transmission
- List your cam, headers, intake, injectors, converter, gear ratio, tire size, and exhaust
- Send your cam card or cam specs if available
- Tell us any current issues: stalling, surging, rich idle, lean codes, shift problems, etc.
Good For
- 1998-2006 GM LS truck and SUV cam swaps
- Silverado and Sierra 4.8L / 5.3L / 6.0L builds
- Tahoe, Yukon, Suburban, Avalanche, Escalade, and Hummer H2 builds
- BTR Truck Norris cam setups
- Texas Speed Chopacabra cam setups
- Similar LS truck cam combinations
- Headers, intake, exhaust, and street truck builds
Best Fit Guidance
- 2007+ GM trucks
- Gen V LT engines
- Diesel trucks
- Vehicles with mechanical problems
- Boosted or nitrous setups unless custom details are provided
- This product is intended for customers who have access to HP Tuners, EFI Live, or a supported flashing device. If you need help choosing the right option, contact JR Jones Racing before purchase.
Performance & Build Responsibility Notice
This is a performance calibration designed for modified GM LS trucks and SUVs 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.
Secure Flashing Reminder
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.
Need Help Matching Your Truck?
If your Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, Hummer H2, or TrailBlazer SS has injectors, converter changes, gear/tire changes, boost, nitrous, or anything beyond a normal Truck Norris / Chopacabra style cam setup, use the Build Your Tune page so we can match the calibration to your exact vehicle.
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