The Rio Grande Credit Union is a auto loan from Rio Grande Credit Union. The ongoing APR is APR as low as: 3.70% (36 months); 4.40% (48); 4.50% (65); 4.60% (75); 4.80% (84). Effective Date: October 17th, 2026. Loan terms: 36; 48; 65; 75; 84 months.