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[1967 4K]

On my 2015 GMC Sierra 5.3 the lifter- camshaft failure happened at 110K miles. A 3K dollar repair bill. 👎👎👎! I’m not waiting for the transmission failure, going to sell soon.

[Too Many Projects]

Originally Posted by 1967 4K

On my 2015 GMC Sierra 5.3 the lifter- camshaft failure happened at 110K miles. A 3K dollar repair bill. 👎👎👎! I’m not waiting for the transmission failure, going to sell soon.

How many times have you changed the fluid in the trans ? I bought my 2011 with 51k and immediately dropped the pan and installed a drain plug. I then dropped and swapped 4 quarts at a time, every 100 miles, until I had run 12 quarts out. Fluid looks like new. I now drop 4 quarts every 3rd oil change (about 20k) and have never had an issue, and I've pulled my car and camper trailers over 20k of the 84k I've driven it. Mine is a 6 speed, is the 2015 the 8 speed ?

[WILMASBOYL78]

Originally Posted by Too Many Projects

How many times have you changed the fluid in the trans ? I bought my 2011 with 51k and immediately dropped the pan and installed a drain plug. I then dropped and swapped 4 quarts at a time, every 100 miles, until I had run 12 quarts out. Fluid looks like new. I now drop 4 quarts every 3rd oil change (about 20k) and have never had an issue, and I've pulled my car and camper trailers over 20k of the 84k I've driven it. Mine is a 6 speed, is the 2015 the 8 speed ?

I rebuilt the trans in our 2004 Suburban at around 165k miles..with some advice from folks here I upgraded a few of the internals. Also installed a trans temp gauge and we are using a hi-perf synthetic fluid.

Your idea of 'freshening' the tranny fluid is a winner...just need the drain plug.