good night, my truck is a dd13 and it has been 2 days since when I accelerate above 1500 rpm a slight screech is heard only when I accelerate above 1500 rpm the truck works well only that slight screech is heard…. What could it be?
Could be either tensioner or the belts to alternator to rule out belts spray water on belts when running if noise stops then I would say its belts, if squeal still there by what you described I would say tensioner pully