brake wiring adapter. 2004 was the final year Tahoe could be ordered with rear barn doors. The 5.3L Vortec 5300 V8 is now rated at and . New colors for 2004 were Dark Blue Metallic, Silver Birch Metallic, and Sport Red Metallic. 2005 New features for 2005 include, Z71 package now available on 2WD models, upgraded tire pressure monitoring system, new OnStar system featuring Gen 6 hardware with analog/digital coverage and upgraded hands-free capabilities. OnStar is now standard on all trims. Touch-screen navigation system now optional. 160-amp alternator, new interior trim, and redesigned aerodynamic side-sill assist steps to improve efficiency. All Tahoes come standard with a rear liftgate and liftglass. A new all-electric cooling system helps with quiet operation as well as fuel efficiency. New aerodynamic changes, including a new front air deflector, help the Tahoe improve fuel efficiency by one MPG. The 4.8L Vortec 4800 V8 is now rated at and . New colors include Sandstone Metallic and Bermuda Blue Metallic. 2006 2006 marked the final year of the Tahoe and Yukon on the GMT800 platform and because of this only minor changes were made. These changes included StabiliTrak standard on all models, combining the OnStar and XM Satellite Radio antennas into one single unit, removal of the Chevrolet badging on the liftgate, removal of rubber trim from the liftglass, relocating the catalytic converter closer to the engine to improve emissions performance and a new manual parking brake adjuster. Bermuda Blue Metallic now becomes an extra cost option. The flex-fuel capable Vortec 5300 V8 is now available on all retail packages. Engines Third generation (2007) General Motors redesigned the Tahoe and Yukon on the new GMT900 platform in late 2005 as a 2007 model. A hybrid version of the Tahoe/Yukon, which uses the shared GM/Chrysler Advanced Hybrid System 2, followed with the 2008 models. The GMT900 based Tahoe and Yukon exceeded initial sales expectations and continued to sell well despite a weakening market for large SUVs. The short-wheelbase Tahoe and its police counterpart began production at Arlington Assembly on December 1, 2005. SWB Yukon production began in early 2006, with Janesville Assembly coming online as well. For the first time, GM used the Tahoe name in Mexico. For 2007, the GMC Yukon and Chevrolet Tahoe received different front fascias, hood, and tail lights. The GMC Yukon boasted a monolithic grille and headlights, while the Chevrolet Tahoe grille was divided