<P> On November 11, 2013, Chevrolet announced that they will build a 2015 Chevrolet Tahoe Police Patrol Vehicle, that was previewed as a concept at the 2013 SEMA show in Las Vegas . The vehicle became available in 2WD and 4WD drivetrains with orders coming in the first quarter of 2014 for special service models, followed by the orders for the police pursuit models afterwards . </P> <Table> <Tr> <Th_colspan="2"> LSSV </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Overview </Th> </Tr> <Tr> <Th> Manufacturer </Th> <Td> General Motors, AM General </Td> </Tr> <Tr> <Th> Model years </Th> <Td> 2001--present </Td> </Tr> <Tr> <Th_colspan="2"> Body and chassis </Th> </Tr> <Tr> <Th> Body style </Th> <Td> 2 - door SUV 4 - door SUV 2 - door pickup 4 - door pickup </Td> </Tr> <Tr> <Th> Platform </Th> <Td> GM GMT880 platform </Td> </Tr> <Tr> <Th_colspan="2"> Powertrain </Th> </Tr> <Tr> <Th> Engine </Th> <Td> 6.6 L Duramax V8 </Td> </Tr> <Tr> <Th> Transmission </Th> <Td> 4 - speed 4L80 - E automatic 5 - speed Allison 1000 automatic </Td> </Tr> <Tr> <Th_colspan="2"> Dimensions </Th> </Tr> <Tr> <Th> Wheelbase </Th> <Td> varies by model </Td> </Tr> <Tr> <Th> Length </Th> <Td> varies by model </Td> </Tr> <Tr> <Th> Width </Th> <Td> varies by model </Td> </Tr> <Tr> <Th> Height </Th> <Td> varies by model </Td> </Tr> <Tr> <Th> Curb weight </Th> <Td> varies by model </Td> </Tr> </Table> <Tr> <Th_colspan="2"> LSSV </Th> </Tr> <Tr> <Th_colspan="2"> Overview </Th> </Tr>

When did the tahoe get a 6 speed transmission