Thursday, August 1st, 2019 AT 10:38 AM
Had issues with Hummer where cylinder 3 bad. GM repaired issue and warranty paid for labor and replacement of cylinder head. GM says when they started it up it made a "horrible noise" and investigation found noise from timing belt because Exhaust Camshaft Actuator bad. GM says wear and tear could cause, warranty will not pay. $1,000.00 or so for fix. What would be the indication that this part was going bad? Could an error in reassembly cause this part to go bad?