T83 Factory-verified

Chevrolet · Regular Production Option

Headlamp control, automatic on and off

Years 1963–79, 2014–19, 2023–27 Models 12 Factory citations 26

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Also described as Retractable headlamp coverHeadlamps, automatic on and off

Also documented for Buick GMC

Documented applications

Impala / Full-Size

1963–70s (varies) Single-source

Blazer EV (2024–2027)

2025 Factory-verified

GM factory document — 2025 chevrolet blazer ev fleet order guide rpo codes, p.1.

Bolt EV — first generation (2017–2023)

2017, 2023 Factory-verified

2017: LT, Premier: S

GM factory document — 2017 chevrolet bolt ev fleet order guide wayback, p.3.
GM factory document — 2023 chevrolet 23 bolt ev body builder sm en us 2022aug26, p.10.
GM factory document — 2023 chevrolet 23 bolt euv body builder sm en us 2022aug29, p.10.

Bolt — second generation (2027)

2027 Factory-verified

LT, RS: S

GM factory document — 2027 chevrolet new bolt fleet order guide, p.3.

BrightDrop (2022–2026)

2025–2026 Factory-verified

S;

GM factory document — 2025 chevrolet brightdrop 400 and brightdrop 600 fleet order guide, p.4.
GM factory document — 2026 chevrolet brightdrop 400 and brightdrop 600 fleet order guide, p.4.

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 chevrolet 23colorado electrical body builder, p.13.
GM factory document — 2024 chevrolet 24colorado electrical body builder manual 18272478 2023oct09, p.14.
GM factory document — 2025 chevrolet colorado fleet order guide, p.38.
GM factory document — 2026 chevrolet colorado fleet order guide, p.42.
GM factory document — 2027 chevrolet colorado fleet order guide, p.42.

Impala — tenth generation (2014–2020)

2014–2016 Factory-verified

all trims: S

GM factory document — 2014 chevrolet impala fleet order guide wayback, p.3.
GM factory document — 2015 chevrolet impala fleet order guide wayback, p.3.
GM factory document — 2016 chevrolet impala fleet order guide wayback, p.3.

Malibu — ninth generation (2016–2025)

2016 Factory-verified

LS, 1LT, 2LT, Premier: S; GM's 2016 Malibu order guide

GM factory document — 2016 chevrolet malibu order guide copy gm authority, p.4.
2025 Factory-verified

all trims: S

GM factory document — 2025 chevrolet malibu fleet order guide, p.6.

Sonic — first generation (2012–2020)

2017–2019 Factory-verified

all trims: S

GM factory document — 2017 chevrolet sonic order guide copy gm authority, p.64.
GM factory document — 2018 chevrolet sonic order guide copy gm authority, p.70.
GM factory document — 2019 chevrolet sonic order guide may 4 2018 copy gm authority, p.63.

Trailblazer — First generation, VSS-F (2021–2027)

2025–2027 Factory-verified

all trims: S

GM factory document — 2025 chevrolet trailblazer fleet order guide, p.5.
GM factory document — 2026 chevrolet trailblazer fleet order guide, p.5.
GM factory document — 2027 chevrolet trailblazer limited fleet order guide, p.6.

Traverse — First generation (2009–2017)

2015 Factory-verified

the 2009 list marks T82 as the code not to use after the 2009 model year and points to T83.

GM factory document — 2015 chevrolet traverse fleet order guide wayback, p.2.

Trax — Second generation, VSS-F (2024–2026)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 chevrolet trax fleet order guide, p.6.
GM factory document — 2026 chevrolet trax fleet order guide, p.6.

This page aggregates every documented appearance of T83 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.