1997–2003 SLP Pontiac Grand Prix GTP GTX: Evolution of a Rare Dealer-Built Performance Sedan
The SLP Pontiac Grand Prix GTP GTX is one of the lesser-known but genuinely intriguing performance variants from the late 1990s and early 2000s — a dealer-built take on Pontiac’s popular Grand Prix GTP that combined modest factory performance with specialty upgrades offered by SLP (Street Legal Performance). Unlike factory performance trims, the GTX was…