I would just clean it with a wire brush and coat it with that black rattle can tar or under coating.

 

I was wondering about what others thought on Chevy's use of that coating vs. using paint.

 

I was extremely disappointed..my '06 Nissan Titan had a rhino-liner like, rubber composite on the undercarriage that would have lasted forever. Its no big deal down south but if I was living in the north again, I would get it redone...the salt on the roads during the winter would just eat away at it...I'm sure GMC is lloking to save money. Its also a total pain if you work on your vehicle..9ause in hot conditons it get all over the place

 

to be honest....i think it sucks very bad..i saw that 2012s just itting on the lot already have the black wax peeling off the frame. I have a post on this as well called "black wax peeling off frame"..i ended up getting mine ziebarted and i touch it up with as seen on tv "flex seal" which is a rubberized undercoating. You woulgd think after all these years gm would stop smearing wax all over an already rusted frame

 

Also on a warm day if you change the oil my arms get all full of the stuff!!!! so in the summer it comes off then in the winter the salt gets it and then you go through a underbody flush car wash and the water takes it right off. All seasons it comes off I I would love to be at a gm plant and see what these frames look like before they put the wax on the frame. I have a feeling they put it right over a already rusty frame. Like i said above i seen a 2012 with brown rust on the frame already

 

It probably gives a small amount of protection, but also keeps people who are shopping for a new truck from saying "Hey this truck is rusty already"!

 

I watched mine come off the transporter right from the factory, it already had rust on the frame in front of the rear tires, i pointed it out the service manager & what they used was zero rust, then they spot sprayed semi gloss chassis paint on the effected areas, so far it looks ok even after the salty Mich.roads this past winter.

 

Mine has only come off were lift arms have picked the truck up and i have had it since last august. When i was done putting my exhaust on i was covered in that black crap. What would you guys recomend for when it wears off?

 

Mine has only come off were lift arms have picked the truck up and i have had it since last august. When i was done putting my exhaust on i was covered in that black crap. What would you guys recomend for when it wears off?

I would recomend having it ziebarted or if you want to do it yourself i would go with the por-15 if you want to paint it on...The spray i uised just for the heck of it was that flex seal as seen on tv...to my amasement i cant believe how good this stuff works!!! better than the ziebarting i got!!! pretty soon gm is gonna put have to put "frame touchup" under the Maintenance 1 schedule in the back of the owners manual

 

anybody have theirs done at ziebart? im thinkin about having mine done and want to know how theirs turned out and how well theirs held up...do they sand off then coat it?

 

anybody have theirs done at ziebart? im thinkin about having mine done and want to know how theirs turned out and how well theirs held up...do they sand off then coat it?

I got mine done at ziebart..The main parts of the frame on the side where it hangs down looked pretty good and held up over the winter..the direct underside though started peeling right off again. You can only see it if you crawl underneath..im picky though so i put some "flex seal" on the areas that chipped it worked great...and no ziebart doest sand the spots..they claim to high pressure spray clean the frame, then put a rust preventer on those affected areas and then undercoat over it..overall it looks ok from all visible sides of the frame..but if you go under to change the oil all flat parts of frame are brown again