2015 chevy silverado

Bought my 2015 Silverado in October of 2019. Had a loss of power issue in April of 2020 and again a month later. Replaced the battery, battery cable and fuse block through a chevy dealer. Still had issues after. 5 tows and 2 thousand dollars later (3 of them being chevy) and finally went to my own shop. Turns out it’s the same issue chevy said they fixed. Called corporate they say has to be.at a chevy deale ruck has spen

Its a warranty claim,you need to go to the chevy dealer for repair.

OP has two posts on this truck.
But, yes the original repair by the dealership should have a warranty, though the truck is out of warranty.
Either the replacement parts were faulty or both the dealership and the other shop missed something.