whats up guys my 3 bar map went out in my car last night and i need one in a hurry, i know that the 86 buick grand nationals use the same style map sensor and i looked identical to the one that one my car but i dont know if its a 2 bar or 3. just wondering if anyone knew if the grand nationals used a 2 bar or 3, also i know the gm part # for the sensor i need but at advance auto they dont carry the gm sensor just aftermarket ones and the part #s dont match up. Thanks for yalls help.