So i bought a 2005 gtp with the comp g package that has a salvage title. Its been wrecked and they used a 2004 grand prix se to put it back together (even the vin and dash) Now i called gm to get the options but soon figured out the title i had is for the 2004 so now im wondering how much needed replaced. Like for instance i have leather seats but no heat button on the climate control panel , does the car have a stock remote starter? Could it have have duel climate control? How can i tell? Honestly the car is clean and really well put back together so i could drive it how it is but if it has those options id like to be able to use them. Also its a comp g gtp shouldnt it have a hud?