Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Recommended Posts

My one truck started its life with a brief stint in Onterrible and came to me equipped with one of those rust preventer modules.  The same truck also had been back to the dealer multiple times with electrical problems surrounding the crank position sensor and they never resolved it under warranty.  First thing I did was unhook and toss that module in the garbage after the truck went into limp mode and threw a code for the crank position sensor shortly after I bought it.  I knew something was up when I cleared the issue by just disconnecting the battery.  No module and it's been fine for almost a year now lol.  

 

I just pull the taillights and the rocker plugs, flush, allow to dry and fluid film.  Much better preventative method.

Link to comment
Share on other sites

12 minutes ago, SierraHD17 said:

My one truck started its life with a brief stint in Onterrible and came to me equipped with one of those rust preventer modules.  The same truck also had been back to the dealer multiple times with electrical problems surrounding the crank position sensor and they never resolved it under warranty.  First thing I did was unhook and toss that module in the garbage after the truck went into limp mode and threw a code for the crank position sensor shortly after I bought it.  I knew something was up when I cleared the issue by just disconnecting the battery.  No module and it's been fine for almost a year now lol.  

 

I just pull the taillights and the rocker plugs, flush, allow to dry and fluid film.  Much better preventative method.

That's possible everyone has a different  story. Have no issues with mine and the dealer does my undercoating since new and let me say this there's not one spot of rust and its 3 years old. The underneath is well protected with whatever so called GM approved stuff it is I'm not sure. Nova Scotia has some of the worst salt roads that will ruin a vehicle in a hurry if not mantained.

Link to comment
Share on other sites

  • 4 weeks later...

I recently finished repairing some of the rust in the rear end (under the bed) on my 2016 Sierra 1500 AllTerrain (came from NJ, has 40k miles now). Sincerely, it is disappointing that these trucks rust so badly so quickly. 30-year old cars have undercarriages in better shape. Regardless, I think the wax GM is using is indeed a good product, the only problem being thin application. When cleaning it off to prepare for painting, the spots where there were tears (i.e., thick application) it was very resistant to getting off of the frame, and the metal underneath was intact. On the other hand, spots where the layer was very thin is where it washed off quickly, and water and contaminants started penetrating from there on - hence the peeling.

Link to comment
Share on other sites

I had no issues with rust since the dealer undercoated my 17 High Country from new, they used whatever so called appoved GM product. Well all I can say they didn't miss anything and dealing with salt for almost 3 years in Nova Scotia was a good test. They also installed a rust module some say it's useless but I'll keep doing what's needed to keep it rust free.

Link to comment
Share on other sites

I've decided to kiss this frame goodbye in about 5 years and build a galvanized one to support V8 tuning (if the motor and cab stay well by then). Anyway, not sure how the previous owner treated the undercarriage given salty NJ roads, but just looking at condition of very old vehicles that have not been specially treated is disappointing (and appears to be by no means exclusive to GM trucks).

Link to comment
Share on other sites

  • 1 month later...
  • 1 month later...

Well, don't feel too bad, guys! Friend has a 2020 Silverado and GM evidently didn't make any changes to their frame wax. The truck is less than two months old and it already has surface rust at the welds. Different looking frame though, instead of round tubes cutting across the frame in the rear, they use square tubing. Didn't crawl under it and see if anything else is different, but the rust and wax looks the same.

 

I fluid filmed my 18 a month after I bought it...I reapply twice a year. 48,000 miles and almost two years later, it looks pretty darn good. But I don't think I should have had to gone through those extremes to keep my frame clean. 

 

It's been a real bad winter here in New England, not a lot of snow, but a ton of ice and salt. Everyday it's been a thorough salt bath.

Link to comment
Share on other sites

25 minutes ago, Doublebase said:

Well, don't feel too bad, guys! Friend has a 2020 Silverado and GM evidently didn't make any changes to their frame wax. The truck is less than two months old and it already has surface rust at the welds. Different looking frame though, instead of round tubes cutting across the frame in the rear, they use square tubing. Didn't crawl under it and see if anything else is different, but the rust and wax looks the same.

 

I fluid filmed my 18 a month after I bought it...I reapply twice a year. 48,000 miles and almost two years later, it looks pretty darn good. But I don't think I should have had to gone through those extremes to keep my frame clean. 

 

It's been a real bad winter here in New England, not a lot of snow, but a ton of ice and salt. Everyday it's been a thorough salt bath.

My 17 High Country is rust free and 3 years old, lots of undercoating applied yearly by the dealer as part of the sale. We live in Nova Scotia where any vehicle is bathed in salt

Link to comment
Share on other sites

6 minutes ago, High Country 6.2L/8 said:

My 17 High Country is rust free and 3 years old, lots of undercoating applied yearly by the dealer as part of the sale. We live in Nova Scotia where any vehicle is bathed in salt

Yeah, you guys are using Krown up there, right? Fluid Film or Woolwax seems to be popular where I am. Think Woolwax actually owns Fluid Film, go figure.

Link to comment
Share on other sites

  • 1 month later...

Is this happening to the 2018 models as well?  I haven't seen that year mentioned. 

 

I used POR-15 in the past on my 66 GTO frame and under the body when it was off.  

Link to comment
Share on other sites

On 2/16/2020 at 5:45 AM, High Country 6.2L/8 said:

Known or Fluid Film is a popular choice yes. As for what's under mine only the dealer knows lol

I think you meant Krown?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Similar Content

    • By Brittney Trefry
      Hi everyone, first time posting, but long time reader. I usually try to avoid posting when I can, and  just browse the threads and read about related problems and figure it out from there. Even though I've found many threads that are similar to the problem Im having, I still can't narrow it down to my next step. so if anyone can help, it would be greatly appreciated. 
       
      Ok so, BAD oil leak problem with my friends 2005 GMC Sierra 1500. It's had this leak for a while, but it's gotten to the point now where it's starting to leave puddles. I power washed the entire area, and I actually got it pretty clean. Today when I looked again to see if I could trace the source, I had a much clearer picture of where the leaks are actually coming from. From what I've read it seems as though it could be the valve cover gasket, the crankshaft sensor, the rear main seal, or even the oil pan gasket. My problem is that to me, it looks like it's coming from almost all these places. I looked inside the bell housing and I don't see it looking completely soaked in oil. It does however, look like the leak is mainly coming from in front of the bell housing behind the engine, in between the two. I'll attach some pictures. These would be from overnight after I power washed it, so the oil hasn't blown anywhere from being driven or anything. Thanks so much to anyone who's got any ideas! 





    • By WvldosWorld
      Alright so my 2006 GMC Sierra was stolen, they stripped my led head lights tail lights 22inch wheels cluster etc. .. I got it back and running but the cluster I replaced mine with was from a Silverado now as I drive the abs lights come on and it says SERVICE BRAKE BOOSTER etc battery light is constantly on when I drive it .. would this be because the cluster I have is not meant for my Sierra ?? Any info helps thanks guys !
    • By Jennifer Smiles
      I have a 2003 yukon sle 2wd. The radio, windows, gauges on right side of the dash all stop working. The abs, tc and air bag lights come on. Now if you press the brake the radio and windows work. The gauges sometime come back on. The vehicle runs good now stalling issues or anything. Just wondering if anyone has any ideas what could cause this. 
    • By Regalcone
      I was adding new license plate lights and accidentally removed a parking sensor it’s been extremely hard to put back any advice.
    • By Justin Berg
      1993 gmc sierra v8 5.7 k just replace both exhaust manifolds and thermostat and housing. When I got vehicle distributor cap wasn't tjghend down have the replacement but when I drive it over heats uses coolant not leaking it but poof gone , no white smoke?
       
       
       
       
       

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    235.2k
    Total Topics
    1.4m
    Total Posts
  • Member Statistics

    261,992
    Total Members
    8,960
    Most Online
    nanil zahid
    Newest Member
    nanil zahid
    Joined



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.