How do you replace a Buick Rendezvous battery?
First you need to remove that support bar that’s blocking access, 13mm bolt is accessible just behind the fuse box, if you have an extended socket. If you do not have an extended socket, you will need to loosen the fuse box screw with an 8mm wrench. The support bar will slide out after it is unbolted. Disconnect the battery terminals with an 8mm or 5/16 wrench. Then remove the battery hold down bolt, 13mm socket. Now, take the battery out-be patient, it’s a tight fit but it will come out.
