When determining what a potential buyer's credit score is, GMAC uses TransUnion credit bureau to pull your credit score from. Should you need an auto loan, it is always good to check your credit rating through all three major credit bureaus (TranUnion, Equifax and Experian). However, it appears GMAC pulls your credit score from only one bureau (TransUnion). Should your score be different with that agency, it is best you check your credit history prior to applying for a loan through GMAC.
