Onstar Installed- New Car Models:

Buick:

1. Enclave
2. LaCrosse
3. Lucerne

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Pontiac:

1. G5
2. G6
3. G8
4. Grand Prix
5. Solstice
6. Torrent
7. Vibe

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GMC:

1. Acadia
2. Canyon
3. Envoy
4. Sierra
5. Yukon
6. Yukon XL

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Cadillac:

1. CTS
2. DTS
3. Escalade
4. Escalade ESV
5. Escalade EXT
6. STS
7. SRX
8. XLR

Others: Chevrolet; Saturn; Hummer and Saab: