Advanced Fuel Dynamics FlexLink Flex Fuel System

Fits 2014-2018 6.2L V8

Advanced Fuel Dynamics FlexLink Flex Fuel System for 2014-2018 GMC Sierra 1500 (6.2L V8)

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gain
7-8% more power at the wheels
AFD's own stated figure; not converted to an absolute hp/tq number
price
$399
at TREperformance
about its usual price

Price tracked 9 times since Jul 26, 2026 across the stores we check daily: low $399, high $399, currently $399.

low $399 · high $399 since Jul 26, 2026, across the stores we check daily
install
2/5 difficulty · ~1 hr

where to buy · 2 retailers tracked

  • TREperformancebest pricechecked Sep 5$399view
  • Advanced Fuel Dynamicschecked Sep 12$399view

A flex-fuel system adds a sensor and controller that let the factory ECU safely recognize and adapt to ethanol-blended fuel (like E85) instead of just gasoline.

why this one — This shared 5.3L/6.2L SKU works for either engine on the 2014-2018 truck, both makes confirmed by name in the product title. FITMENT AMBIGUITY FLAGGED: AFD's own page states fitment as "2014-19" without breaking it out by engine or by trim; since the 6.2L engine was never offered on the 2019 Silverado 1500 LD / Sierra Limited K2XX carryover (per this catalog's own vehicles table, that trim is 5.3L L83-only), the "19" portion of AFD's stated range is treated here as unverified for the 6.2L specifically and this row is scoped conservatively to 2014-2018 only.

where the number comes from

Advanced Fuel Dynamics' own product page states "Expect 7-8% more power at the wheels" along with "more torque for hauling and towing" and "lower cylinder, oil and coolant temps."

heads up

Running E85 can affect powertrain warranty and requires E85-compatible fuel-system components downstream.

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