The scores were tied at 1-1 at the interval, Heigh’s opener cancelled out by Uddingston’s Gavin McKenzie.
Grange exerted their authority in the second half, Matt Murphy put them 2-1 up and with ten minutes left Heigh added a third from a penalty corner.
Rivals Western Wildcats romped to the top of the division with a 6-1 win over Hillhead, Andrew McConnell was the hat-trick hero, Fraser Calder got a brace adding to Fraser Morton’s goal.
Elsewhere, Clydesdale beat Dundee Wanderers 4-1 while Dunfermline Carnegie saw off Inverleith 4-3 on their Premiership debut.
Women’s match of the day at Peffermill ended 1-0 to Clydesdale Western against Watsonians, the only goal from a penalty corner conversion by Scotland’s Jen Eadie.
Top sides Wildcats and Dundee Wanderers were both held to draws by Hillhead and Gordonians respectively.