Description
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Precision drill jig centers over broken studs; slip-fit bushings speed hole-to-hole moves.
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Designed for GM EcoTec3 5.3L L83 / 6.2L L86 L87 V8s; Silverado, Sierra, Tahoe, Yukon, Escalade fitment.
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Prevents cylinder-head damage; includes depth control & tap-size guide for clean threads.
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Heat-treated plate & hardened bushings built for shop use; accurate repeatable alignment.
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Complete pro workflow: align, pilot, drill-to-tap, extract—ideal for fleets & DIY.
Fitment Chart
Make Model Engine Years Chevrolet Silverado 1500 5.3L L83 2014–2018 Chevrolet Silverado 1500 6.2L L86 2014–2018 (select trims) Chevrolet Tahoe 5.3L L83 2015–2019 Chevrolet Suburban 5.3L L83 2015–2019 GMC Sierra 1500 5.3L L83 2014–2018 GMC Sierra 1500 6.2L L86 2014–2018 (select trims) GMC Yukon/Yukon XL 5.3L L83 2015–2019 GMC Yukon Denali 6.2L L86/L87 2015–2020 (Denali trims) Cadillac Escalade/ESV 6.2L L86/L87 2015–2020 (Fitment focuses on Gen-V EcoTec3 V8 trucks/SUVs; always confirm engine code before service.)
Stuck or broken exhaust manifold bolts are common on GM EcoTec3 V8s. The Oni Tools Exhaust Manifold Broken Bolt Drill Template fixes them fast—without risking cylinder-head damage. Our hardened alignment plate anchors to existing holes with tapered guide bolts, then slip-fit bushings let you move from port to port without re-centering. A depth reference keeps drilling on-spec, and the included tap-size guide supports clean thread repair when extraction isn’t possible. Engineered for GM EcoTec3 5.3L (L83) and 6.2L (L86/L87) applications on Chevrolet Silverado/Suburban/Tahoe, GMC Sierra/Yukon, and Cadillac Escalade. Built for busy shops yet simple enough for weekend techs, this kit restores sealing surfaces, saves labor hours, and protects high-value heads—everything you need for reliable manifold bolt service on modern GM trucks and SUVs.
