GPI L83 / L84 (5.3L) DI Truck Low Lift Cams - STG3 (2014+ GM Truck) - L83LL3
Aggressive Low Lift Cam for Hardcore 5.3L DI Truck Builds
The GPI L83LL3 STG3 is built for the hardcore 5.3L Direct Injected truck enthusiast who wants more than mild gains. This is the cam that steps up beyond STG1 and STG2, delivering more torque and horsepower across the curve with very strong performance all the way to 6600 RPM. It's designed for serious street/strip applications where an upgraded converter and proper supporting mods are part of the plan.
Despite being a low lift LT truck cam, the STG3 hits hard when paired with the right combination - free-flowing intake and exhaust, gearing, and a properly chosen stall. It maintains the smooth, quiet lobe design that GPI is known for, helping ensure valvetrain stability and longevity even under demanding use.
Technical Notes
- Low lift LT truck camshaft designed for L83 / L84 5.3L Direct Injected engines.
- Requires Stock LT1 valve springs, hardened pushrods, and a GPI 0° Phaser Limiter.
- No head milling without checking piston-to-valve (PTV) clearance; L83 pistons have less clearance than LT1/L86.
- Requires an upgraded torque converter to fully support the operating range.
- Very strong to 6600 RPM with proper supporting hardware.
GPI 5.3 Direct Injected Truck Cam Family
GPI's 5.3L DI truck cams have earned their reputation as pound for pound the best 5.3 Direct Injected truck cams on the market for 2014+ GM platforms. While originally designed around naturally aspirated combinations, these profiles also work exceptionally well with centrifugal superchargers thanks to their linear, NA-friendly power curves.
There are four primary iterations in the series - from near-stock manners to all-out max power applications. The STG3 sits toward the more aggressive side of that range, ideal for the enthusiast who wants serious performance and isn't afraid of supporting mods.
STG3 Cam Specs - L83LL3
- Duration (Int/Exh): 21x / 23x
- Valve Lift (Int/Exh): .54x / .54x
- LSA: 114
- ICL: +4
- RPM Capability: Very strong to 6600 RPM
- Converter: Upgraded torque converter required
- Phaser Limiter: GPI 0° Phaser Limiter required
Performance Highlights
- Makes more torque and horsepower than STG1 and STG2
- Perfect for hardcore street/strip and performance truck builds
- Strong high-RPM capability while retaining low lift valvetrain constraints
- Pairs very well with high-flow intake, exhaust, and gear changes
- Boost-friendly design for future centrifugal blower setups
- Engineered for reliability with proper supporting hardware
Quick Specs
- Part Number: L83LL3
- Engine: 5.3L L83 / L84 Direct Injected
- Duration: 21x / 23x
- Lift: .54x / .54x
- LSA / ICL: 114 / +4
- Max RPM: Approx. 6600 RPM with proper setup
- Converter: Upgraded unit required
- Limiter: GPI 0° Phaser Limiter
Fitment
Chevrolet Silverado 1500 - 5.3L L83 / L84
- 2014 Chevrolet Silverado 1500 5.3L
- 2015 Chevrolet Silverado 1500 5.3L
- 2016 Chevrolet Silverado 1500 5.3L
- 2017 Chevrolet Silverado 1500 5.3L
- 2018 Chevrolet Silverado 1500 5.3L
- 2019 Chevrolet Silverado 1500 5.3L
- 2020 Chevrolet Silverado 1500 5.3L
- 2021 Chevrolet Silverado 1500 5.3L
- 2022 Chevrolet Silverado 1500 5.3L
- 2023 Chevrolet Silverado 1500 5.3L
- 2024 Chevrolet Silverado 1500 5.3L
GMC Sierra 1500 - 5.3L L83 / L84
- 2014 GMC Sierra 1500 5.3L
- 2015 GMC Sierra 1500 5.3L
- 2016 GMC Sierra 1500 5.3L
- 2017 GMC Sierra 1500 5.3L
- 2018 GMC Sierra 1500 5.3L
- 2019 GMC Sierra 1500 5.3L
- 2020 GMC Sierra 1500 5.3L
- 2021 GMC Sierra 1500 5.3L
- 2022 GMC Sierra 1500 5.3L
- 2023 GMC Sierra 1500 5.3L
- 2024 GMC Sierra 1500 5.3L
Chevrolet Tahoe - 5.3L L83 / L84
- 2015 Chevrolet Tahoe 5.3L
- 2016 Chevrolet Tahoe 5.3L
- 2017 Chevrolet Tahoe 5.3L
- 2018 Chevrolet Tahoe 5.3L
- 2019 Chevrolet Tahoe 5.3L
- 2020 Chevrolet Tahoe 5.3L
- 2021 Chevrolet Tahoe 5.3L
- 2022 Chevrolet Tahoe 5.3L
- 2023 Chevrolet Tahoe 5.3L
- 2024 Chevrolet Tahoe 5.3L
Chevrolet Suburban - 5.3L L83 / L84
- 2015 Chevrolet Suburban 5.3L
- 2016 Chevrolet Suburban 5.3L
- 2017 Chevrolet Suburban 5.3L
- 2018 Chevrolet Suburban 5.3L
- 2019 Chevrolet Suburban 5.3L
- 2020 Chevrolet Suburban 5.3L
- 2021 Chevrolet Suburban 5.3L
- 2022 Chevrolet Suburban 5.3L
- 2023 Chevrolet Suburban 5.3L
- 2024 Chevrolet Suburban 5.3L
GMC Yukon - 5.3L L83 / L84
- 2015 GMC Yukon 5.3L
- 2016 GMC Yukon 5.3L
- 2017 GMC Yukon 5.3L
- 2018 GMC Yukon 5.3L
- 2019 GMC Yukon 5.3L
- 2020 GMC Yukon 5.3L
- 2021 GMC Yukon 5.3L
- 2022 GMC Yukon 5.3L
- 2023 GMC Yukon 5.3L
- 2024 GMC Yukon 5.3L
GMC Yukon XL - 5.3L L83 / L84
- 2015 GMC Yukon XL 5.3L
- 2016 GMC Yukon XL 5.3L
- 2017 GMC Yukon XL 5.3L
- 2018 GMC Yukon XL 5.3L
- 2019 GMC Yukon XL 5.3L
- 2020 GMC Yukon XL 5.3L
- 2021 GMC Yukon XL 5.3L
- 2022 GMC Yukon XL 5.3L
- 2023 GMC Yukon XL 5.3L
- 2024 GMC Yukon XL 5.3L
FAQs
What converter do I need for the STG3 cam?
An upgraded torque converter is required. A higher stall helps keep the engine in the cam's ideal powerband and maintains drivability.
Is the STG3 still compatible with boost?
Yes. Like other GPI truck cams, STG3 works extremely well with centrifugal blowers thanks to its naturally aspirated-friendly, linear power curve.
Why Buy from Beefcake Racing?
Beefcake Racing offers real-world camshaft experience, proven LS and LT combo recommendations, and fast shipping on GPI components. Need help choosing the right cam for your 5.3L DI truck?
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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