TRZ meaning in General ?

The Buick Terraza is a luxury minivan that was marketed by Buick from 2005 through 2007 model years. The Terraza was a badge engineered variant of the Chevrolet, Pontiac, and Saturn minivans sharing the U platform; (Uplander, Montana SV6, and Relay respectively) in Doraville, Georgia.

The Terraza retailed at US$28,110 in 2005. The Buick debuted with one engine, a 3.5 L High Value V6 that generates 200 hp (149 kW) and 220 lb·ft (298 N·m) of torque, going from 0-60 mph in the 9-second range. For 2006, a 3.9 L LZ9 V6, with 240 hp (179 kW) and 240 lb·ft (332 Nm) torque. It offered leather seats, and a wood trim on the panels and also offered on the steering wheel and gear shift knob.

For 2007, the 3.5 L V6 was dropped, leaving the 3.9 L as the base engine. Consequently, the optional AWD system was also dropped, since it could not handle the torque of the 3.9 L engine. A flex-fuel version of the 3.9 L V6 also became available for the Terraza's third season. The 2007 Terraza equipped with side airbags scored a "good" in the frontal offset and an "acceptable" in the side impact Insurance Institute for Highway Safety (IIHS) crash tests.