Pulling the can is NOT normal/required to do the job. But whatever, sounds like you got it fixed on GMs dime.Just got my 11 back from cp4 failure. Dealer had it for 7 days. They had to take the cab off the truck to get to it, so I'm guessing you dont wanna do this in your garage. Cost was close to $10K to replace the whole fuel system due to metal from the pump going through the system. Not a fun fix. Thank GOD it was under warranty.