Pontiac Bonneville X (G-body) gallery (2000–2005)

The tenth and final generation Bonneville transitioned to the rigid G-body architecture, culminating in the 275-hp Northstar V8-powered GXP.

All photos 53 I 10 1957–1958 II 0 1959–1960 III 0 1961–1964 IV 29 1965–1970 V 0 1971–1976 VI 0 1977–1981 VII (G-body) 0 1982–1986 VIII (H-body) 0 1987–1991 IX (H-body) 0 1992–1999 X (G-body) 8 2000–2005

Pontiac Bonneville X (G-body) photo 3166

Debuting for the 2000 model year, the tenth-generation Pontiac Bonneville represented the ultimate evolution of Pontiac's full-size flagship. Migrating to General Motors' robust unibody G-body platform (shared with Cadillac and Oldsmobile), torsional rigidity increased by over 60 percent, yielding superior crash protection and refined road manners. Offered purely as a four-door sedan, trim tiers included SE, SLE, supercharged SSEi, and the high-performance GXP introduced for 2004. Engine offerings commenced with the bulletproof 3.8-liter 3800 Series II V6 (205 hp) and the supercharged 240-hp 3800 V6 in the SSEi. For 2004-2005, the SSEi was superseded by the Bonneville GXP, packing a Cadillac-derived 4.6-liter 32-valve Northstar DOHC V8 delivering 275 horsepower and a deep V8 exhaust note. Power was managed by GM's 4T65-E and 4T65E-HD 4-speed automatic transaxles. High-tech equipment included StabiliTrak electronic stability control, monsoon audio, and 18-inch alloy wheels on the GXP. Sold in North America, production permanently concluded in May 2005, ending nearly five decades of Bonneville history.