XM announced the continued expansion of its award-winning real-time XM NavTraffic service into 22 GM vehicles in the 2009 model year. XM NavTraffic is already on the Cadillac CTS. Among the vehicles to offer XM NavTraffic will be navigation-equipped versions of some of GM’s most popular models, including the Chevrolet Tahoe, GMC Sierra, Buick Enclave, Saturn Vue and Hummer H2.
