Q: How do you remove and install ignition coils on a Buick Enclave,Chevrolet Traverse and GMC Acadia?
A: Disconnect the cable from the negative battery terminal. Remove the engine cover. On 2008 and earlier models, remove the underhood fuse/relay box to access the rear bank ignition coils. On 2009 and later models, remove the intake manifold to access the front bank ignition coils. Disconnect the electrical connector from coil. Remove the ignition coil mounting fastener. Pull up and twist to remove the coil. Apply a little silicone dielectric compound to the inside of each boot before installing it. Installation is the reverse of removal.