Like the 2004 GTO, the 2005 model was once again a Holden Monaro CV8 imported from the GM subsidiary in Australia and fitted with Pontiac and GTO emblems for the U.S. For the 2005 model year, GM had the necessary time to design and implement a hood with scoops and split dual exhaust tailpipes that would exit both sides of a GTO labeled rear valance. This of course gave the new GTO some cosmetic reminders of the classics that the 2004 model didn’t have. Late in the 2005 model year, 18 inch wheels became an available option. An optional dealer installed Sport Appearance Package became available and differed visually by having a different lower rear fascia that sported quad chrome exhaust tips, louder aggressive sounding mufflers, a modified spoiler, a modified front lower fascia extension, recessed grilles, and modified rocker panels. Customers had the option to order the 2005 GTO without hoodscoops, although only 24 were produced this way. Another change for 2005 was the replacement of the LS1 engine with the LS2 engine, which was rated at 400 hp. The standard transmission was a four-speed overdrive automatic, but a six-speed, close-ratio manual transmission was a popular option.
2005 GTO Production Numbers:
6,809 with the optional manual six-speed transmission
4,260 with the Hydra-Matic four-speed automatic transmission
Total Production: 11,069