How often does problems with transmissions occur for this make and model? on 2006 Buick Rendezvous

what would the most reasonable cost be to replace a transmission and what kind of maintenance would be best to avoid this problem?

Asked by for the 2006 Buick Rendezvous
1 answer
the trans replacement could cost approx 4000.00 and the best adv is service every 35k miles to avoid this issue again