RepairPal Certified shops can diagnose and repair your 2000 Chevrolet Astro. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
2000 Chevrolet Astro 2002 ASTRO van stuck in low gear
Possible askew Throttle Position Sensor (TPS) readings .. TPS has major influence on transmission shifts .. Professional scan test will be required to confirm..
Considering location of this part - it is also advisable to have qualified personnel perform part replacement - IF proven necessary.