GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi there, I am Cam. Can I get your first name please?With your Terrain, the rear plugs are covered by the intake manifold, so that means we need to remove the upper intake manifold to gain access to the coil packs. I will get you a diagram.
this is a link to dropbox. https://dl.dropboxusercontent.com/u/22552935/My%20Boot%20Camp%20printed%20document-7.pdf