Headlamps, halogen high beam

Years 1983–89, 2004–06 Models 6 Factory citations 20

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Also described as Headlamps, halogen, high beamHeadlamps, halogen, 2

Also documented for Buick Chevrolet Oldsmobile Pontiac Saturn

Documented applications

Caballero — G-body (1983–1987)

1983 Factory-verified

The 1984 order guide prints T.T5, so 1984 is not claimed; shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits

GM Heritage factory kit — 1983 Chevrolet El Camino, p.6.

Canyon — GMT355 (2004–2012)

2004–2006 Factory-verified

GM factory document — 2004 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2005 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2006 gmc canyon pickup 2wd rpo code list, p.1.

Jimmy (full-size) — Square body (1983–1991)

1983–1986 Factory-verified

only with V22 or YE9; shared square-body platform code; cited from the Chevrolet Blazer kit

GM Heritage factory kit — 1983 Chevrolet Blazer, p.9.
GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.18.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.11.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.12.

Sierra — Square body (1983–1991)

1985–1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; the 1984 kit page (p.45) prints the code as TTS, which is not an accepted reading, so 1984 is left out

GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
GM Heritage factory kit — 1987 Chevrolet Truck, p.58.

Suburban — Square body (1983–1991)

1983–1986 Factory-verified

only with V22 or YE9; the 1987 page prints TTS; shared square-body platform code; cited from the Chevrolet Suburban kit

GM Heritage factory kit — 1983 Chevrolet Suburban, p.16.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.22.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.19.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.20.

Vandura and Rally — Second generation G-series (1983–1996)

1983, 1984, 1986, 1988, 1989 Factory-verified

shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1983 Chevrolet Vandura, p.17.
GM Heritage factory kit — 1984 Chevrolet G Van, p.17.
GM Heritage factory kit — 1986 Chevrolet G Van, p.65.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.22.
GM Heritage factory kit — 1989 Chevrolet G Van, p.35.

This page aggregates every documented appearance of TT5 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.