I need to remove the bed on my 2007 Silverado Classic to replace the fuel sender. The bolts are very rusted, three have been broken in the past, before I bought it.
Last year, I sprayed down the bolts with SeaFoam and after several days of testing with a breaker bar, I eventually got them all to loosen up but did not remove them, only retightened. I decided to put off the job for awhile.
I sprayed down the bolts last weekend with PB Blaster and tried with the breaker bar again. The first bolt did not feel good, like I might be breaking it, so I stopped and sprayed all the bolts with Breakfree.
I was watching one of the PowerNationTV shows a couple of weeks ago and one of the mechanics mentioned that he was using an impact tool on some rusted bolts because it was less likely to break a bolt.
So, opinions. Breaker bar or impact tool. BTW, he was using a battery powered (20V) Matco impact wrench.