Denali0229
Full Access Member
Where is the brake booster vacuum line on an 07 Denali? I did a Google search and a search on here as well but all I could find was for an 04 Tahoe. It would be awesome if you could maybe demonstrate on a photo with an arrow but if you could just describe it for me, that will suffice. Obviously, I'm not the most mechanical person. I want to do the Seafoam before my next oil change so I figured I should get familiar with my engine now. My mpg seems like it keeps getting worse, especially after I added the Lucas engine cleaner a couple of weeks ago. Seemed like it dropped 2-3 mpg after I used it but I can't blame it just one that product but it was a noticeable drop after using it so who knows.
