New guy here
2021 GMC Sierra with 3.0L diesel 62,000 miles. Love the truck and engine performance BUT since about 45,000 miles I have noticed an intermittent pronounced tapping sound. The sound is not the typical diesel clatter its more like a valve tap sound or possibly fuel pump. The intermittent nature has me perplexed and paranoid. No smoke or oil consumption.
Dealer has no ideas yet.
Any ideas?
2021 GMC Sierra with 3.0L diesel 62,000 miles. Love the truck and engine performance BUT since about 45,000 miles I have noticed an intermittent pronounced tapping sound. The sound is not the typical diesel clatter its more like a valve tap sound or possibly fuel pump. The intermittent nature has me perplexed and paranoid. No smoke or oil consumption.
Dealer has no ideas yet.
Any ideas?