Topping the line, the GTP edition (actually an option package) got a supercharged version of the 3.8-liter unit. Antilock 4-wheel disc brakes were standard, as was traction control (but not with the supercharged engine). Also standard was a tire-pressure monitor.




All of this
From Consumer Guide Full Review


1998 Pontiac Grand Prix: Few changes came this year, except that traction control now was available with the supercharged engine. Airbags were "depowered" to deploy with reduced force.