Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi there, I am cam. Can I get your first name please? Your on the right track with a relay. The two relays in the left dash fuse block do control the rear doors and hatch. Poor contact inside is the usual issue followed closely by a bad lock or unlock fuse. I suggest you begin by taking the fuses and checking them. The. Remove the relays and tap them Several times to knock any debris off the contacts. If this does not work then Replace those relays. Let me know what you find.