Ship thru, Kerr Industries, Livonia, MI

Years 2004, 2025–27 Models 2 Factory citations 7

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Also described as Package, low-price Cavalier

Documented applications

Cavalier — third generation (1995–2005)

2004 Factory-verified

GM factory document — 2004 chevrolet cavalier rpo code list, p.1.
GM Heritage factory kit — 2004 Chevrolet Cavalier, p.21.

Silverado EV — BT1 (2024–2027)

2025–2027 Factory-verified internal

vehicle built in Factory Zero, Hamtramck, shipped to the upfitter and returned to Factory Zero for final shipping; 2025: A in 2WT, 5WT, 8WT; not offered in 3LT, 2SP, 3SP; 2026: A in 4WT, 5WT, 8WT; not offered in 2LT, 3LT, 4LT, 2TR, 3TR, 2SP, 3SP; 2027: A in 4WT, 5WT, 8WT; not offered in 2LT, 3LT, 2TR, 3TR

GM factory document — 2025 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2025 chevrolet silverado ev fleet order guide, p.41.
GM factory document — 2026 chevrolet silverado ev fleet order guide, p.66.
GM factory document — 2027 chevrolet silverado ev fleet order guide, p.55.

This page aggregates every documented appearance of TW4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.