Sierraman92

Yeah at this point I guess I’m going to be looking to trade the l87 and 10 speed for a L86. But I’m going to be wanting to put a stage 2 cam and upgraded valve train in to go with the Supercharger and also pull the 6l80 and have it built. So that’s $1700 for the trans build and $3k for upgraded valve train(when I say upgraded I mean trunion rocker arms, push rods, gm performance lifters, ARP bolts/studs for heads, headers, valve covers, with mls gaskets). Ahhh what do I do??

Yeah I’m fearing the worst. It’s actually a L87 out of a 2020 Sierra. I didn’t know if Powertrain Swap Solutions would have a fix.

No it’s out of a 2020 Sierra

I’m trying to swap my L83 and 6l80 in a 2014 sierra for a 2020 l86 and 10 speed trans. I don’t have the 2020 l86 harness or ecm, but I have everything else. If I get the harness and ecm for the 2020 will everything else be plug in play or what else will I need to do? No one seems to to have done this and I can’t find anyone who’s help. Thanks in advance.