Frame wax?

[SilveradoRST]

Sorry if this has been discussed before.   Do the 2021 Tahoe, Suburban and Yukon have waxed frames similar to the Silverado/Sierra?

[coachhomer]

This is my first GMC in a while so I am not sure if I am answering correctly but I was under the front of the vehicle a week ago and I noticed a thick undercoating on the frame. I questioned it at the dealership and they said it was a protective coating. Never had that on any other vehicle I have owned. Don’t know if that is what you are referring to?

C


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[MTU Alum]

Frames are waxed.

 

#iworkforGM 

[SilveradoRST]

4 minutes ago, MTU Alum said:

Frames are waxed.

 

#iworkforGM 

Thank-you!  

[drust]

 

This video shows the waxed frame on the Sierra (starting at 9:40 mark) . Not a fan of how badly this truck had rusted after only one winter of driving. 

[Pawg]

Fluid Film works great.  Hit the entire underside of the vehicle and inside any hole.  Been using it on City fleet trucks up here with the salt and no issues.