Plastic arm is asking for problems. It was the original one, right?
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Plastic arm is asking for problems. It was the original one, right?
Corrosion can make that a real pain I agree, but if this wiper arm is in fact totally plastic from the factory, I don't think it'll be corroded.Not all rear wiper changeouts are easy peasy. A number of folks here, including myself, had a hell of a time getting the wiper arm base off the splines. I had to use a pully puller to get mine off the splines. Before mounting the new wiper blade arm, put some grease on the splines, so that if needed, you can easily remove the wiper the next time (hopefully never).
I purchased a rear wiper arm (perhaps Dorman) from Rock Auto, and 3 years later, it is still operating fine.
Easy peesy. Remove the rusty nut, remove the portion that's still attached to the splines, and replace the entire assembly. Found a replacement for under $10;
https://www.ebay.com/itm/284025856214?fits=Year:2014|Make:GMC&epid=18036167344&hash=item422142a0d6:g:3ccAAOSwvzFd6KVa&amdata=enc:AQAHAAABANA1VfftQMT4Bb23OurJoIOuIC4XcPNNUOCnfghyD/7FGgNcfz4Hl5dhBpRJl2gikCrWgwpCpT5gHX+exvP+ir935A2CACqEF1ZqmaZYdhTabcaIdj+4M1t1rY2+y+9nrV2f+PiAj4AxJmNzxIDHx+FY7w6wPSvZQtiRpl5BMjlZmOg4Wvna9LVBnqXozooWvGbiD5oQYXUduYQiJ6Sd+tBIvW/uCANCnsHs+UpqSsOfwpTdffrBB8HNbRtP5LzR6InYDnWray/X/d1VbgzovPw8RUnt84YHI5XRBD2HO6MY6g2pRySyO3mxj3bs3gYy4b500ybLfmtSiE7q3UthKAU=|tkp:Bk9SR6ywiM-8YQ
EDIT: 1A Auto Parts must be a real super duper ripoff at $100 vs $10.