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Discussion Starter · #1 ·
Hey, I have always noticed this noise and I was wondering if anyone else has this noise. Let me say it is not CSK, the engine has that as well at start up. engine is a 2000 4.8L.

When going up hills or when the truck is in OD doing between 1000-1600 rpm (~45 mph) you can really hear like a pinging/ticking noise. afaik. this engine has done this since day one. what is it? thanks, michael.
 

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Discussion Starter · #2 ·
does this make sense?

GUYS.....My 01 as well as my 04 has the tick ! Quite annoying
at a drive thru ! All new GM trucks have roller rockers so a
lifter tick is almost impossible.

The tick your hearing is fuel flowing thru the rails and injector poppets.
A mechanic whipped out a stethoscope and let me hear for myself
when I took it to the dealer.
 
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