2015 Yukon XL Denali has 200,000 miles and is TICKING

[mrctx5000]

Hey guys, I'm just looking for suggestions on what to start checking for this engine noise.  Best described as a tap with a squeak happening at about 1/2 of idle speed RPM.  I hear it loudest with a stethoscope at the rear top of the engine. Vehicle is completely stock. Never had any engine work done. Oil changes done faithfully and currently using Amsoil SS 0w-20. Yes , i drive a lot and I've had to do just about every repair these vehicles are known for,  But never messed with the basic engine.  Maybe cam,  HP fuel pump?? Thank you.

[SARNCAN]

Hey guys, I'm just looking for suggestions on what to start checking for this engine noise.  Best described as a tap with a squeak happening at about 1/2 of idle speed RPM.  I hear it loudest with a stethoscope at the rear top of the engine. Vehicle is completely stock. Never had any engine work done. Oil changes done faithfully and currently using Amsoil SS 0w-20. Yes , i drive a lot and I've had to do just about every repair these vehicles are known for,  But never messed with the basic engine.  Maybe cam,  HP fuel pump?? Thank you.

Make sure that isn’t the vacuum pump. Have you had any problems with the break?