New Member

[Tuna]

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?

 

[gemarsh]

Welcome.

Sure is nice to have a 100k powertrain warranty on the diesels!

The 6.2 would have spun a bearing right after 60k, some are spinning WAY earlier!

 

[BoostN]

Welcome.. yea, perhaps try and catch it on video and maybe someone has some advice. Diesels are a bit noisy. As also, if a person thinks something might be off make the dealer answer for it, and if that doesn't work you can always sell before the 100K is up!