There is an aftermarker PCM (power control module) available for around $100. that will increase horsepower; remove the speed limiter and several other things. Other engine mods are recommended to take advantage of the extra horsepower and 91 or more octane is recommended.
Check out the following website:
http://www.pfyc.com/PC/GP3012/GPUNDER/Digital+Horsepower+PCM+-+97-03+Grand+Prix.HTML
Hope this helps.
"G"
ur cheapest way to increase horse power would be replacing your air filter with a cold air intake. you can also add a perfomance chip to your ecu.
I believe it's 325 horse.
130hp
2001 Pontiac Montana?
Have you checked the power steering pressure line?
320 Horse power
260 horsepower
The horse power is 300hp
320 horsepower
300 horsepower
It is on the left side of the engine back by the firewall.
200 hp