What kind of tools are you using? My truck had almost 100k on it and the bolts were pretty stuck but all we used was an impact wrench and they came right out. I got this stuff called deep creep also. Its made by seafoam i think. Its supposed to penetrate and lubricate down in the threads. It worked well for me. I picked it up at the local NAPA for like $5. Definitely made my life easier.