bought my cowl fix on ebay for my regal. iirc its the same part for a gtp, 8 bucks and 15 minutes of time. good time to change or add the cabin air filter.
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW