htex88

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My 21 Silverado 1500 is stuck in the shop after getting the rear brake pads and rear right side rotor replaced. They used a fancy scanner to put it in service mode but now the truck won’t come out of it. They tried disconnecting the battery, having the dealership reflash the module, and some other online tricks. It was explained to me, that supposedly, the piston or something retracted too far and got stuck? I managed to hook my scanner up to it when I went to get my things out of the truck and got these codes P0602-00, C15C7-00, C2A1C-00, and C2A1B-00. They said it might need a new module, but they wont be able to get one for a while because they are on national back order. So has anyone run into this problem after replacing the rear brakes? Were you able to get it fixed? Also is the shop liable for replacing the module?

I ended up with E range tires, they were on sale and didn't realize it. At 34.21", there's a pretty big difference in fuel economy and acceleration. You definitely notice the transmission shifting more when going 80 uphill on the highway. Would I benefit from going to 3.42 gears with the heavier load tires? I also found GM OEM front and rear differential for 3.42 and 3.73, it says ring gear is included 84444115 - General Motors Differential. Carrier | GM Parts Bin, CLINTON TWP MI

would this be the same for 275/65-20 tires?