Yukon Hybrid models were discontinued after the 2013 model year as GM moved to make their SUVs more fuel efficient with the introduction of the EcoTec engine that they would later install in the 2015 Tahoe and Yukon. Outside the United States In Brazil the Tahoe GMT400 was sold under the name of "Grand Blazer", sourced from Argentina with rear-wheel drive only, regionally-sourced 6-cylinder engines (the late-type 4.1 M.P.F.I. Chevrolet straight-6 as the only gasoline-powered option and the 4.2L MWM Sprint 6.07T for those who preferred Diesel) and manual transmission. The GMT400 is used by Brazilian elite police units, such as the BOPE (Batalhão de Operações Policiais Especiais) in Rio de Janeiro and the ROTA (Rondas Ostensivas Tobias de Aguiar) and GATE (Grupo de Ações Taticas Especiais) in São Paulo. It is also used by the São Paulo State Police and the Rio Grande do Sul State Police. But as the cars grew old, the great majority of them were substituted, mainly by the smaller Chevrolet Blazer midsize SUV. The Tahoe name was not used in Brazil because it would be unfamiliar to most Brazilians since it refers to the Lake Tahoe on the border of Nevada and California. Elsewhere in South America, Chile, has incorporated the Tahoe as a transport vehicle for the special operations unit (GOPE) of the Chilean Police (Carabineros de Chile) to carry communication equipment. The Tahoe was also assembled in Venezuela from CKD kits for three generations, being phased out in 2014 along most of the local Chevrolet range due to unfavorable economic conditions and political circumstances. The fourth generation of the Tahoe has not been available in Venezuela. In Ecuador, due to the tax benefits hybrid vehicles offer, the third generation of the Tahoe was offered only in the hybrid version until 2011. A review of the benefit to exclude hybrid vehicles with a displacement greater than 1.8L rendered the Tahoe Hybrid less cost-effective than the non-hybrid in Ecuador. Police package In North America, the Tahoe is used by many law enforcement agencies, fire departments, and EMS agencies. Prior to the announcement of the Z56 police package model the civilian base & LS models based on the GMT400 were used in police service. During the 1997 model year, the Tahoe was offered with the Z56 police option using suspension components from the discontinued 454SS truck – the first Tahoe Z56s were available only in