2000 GMC SIERRA 2500 LIFTER NOISE

Could be bad circuit boards

There is,If you do the lifter you could be after something else,The noise sounds like a collapsed lifter,A collapse lifter can cause a misfire,The 2003 GMC sierra or I should say the 4.8 engines suffer from a cut O-ring between the oil pump screen and the oil pump causing oil areation,resulting in lifter noise,The noise will be present a cold start and then diminish at warm up.

Probably not lifters. Huge well documented issues with piston skirt slap in the vortec engines when cold. Pistons made at one location and blocks at another. Manufacturer will not make any repairs. So don't go there, you'll be wasting your time. Lots of documentations from both manufacture and owners of no damage noted after high mileage. Options are to live with it, let it warm first before driving or rebuild engine- bore one size and replace pistons with a better one with a coating on walls. Did one for a gentleman with 59,000 miles 3 years ago and he's totally happy. He could not live with the noise it was making. My Wifes 2000 Yukon has same problem. If you have a diesel.. not my area.
Good luck

google: vortec piston slap, read , get mad, welcome to the club!

When you replace spark plug look at the gap is it worn(just compare it to a new on)now is this noise at idle or are you acclerating at idle its a lifter noise.If its at acceleration then time for spark plugs fuel filter.Remeber to use the proper weight on it.Dont listen to someone that says you can use a thicker oil. Make sure the oil you use has not been strip of zinc which API has removed and allot of premature engine failure are occuring. Use mobil stay away from penzoil they have no anti wear additives engine are wearing out quickly.

could be tire noise,unbalanced drive shaft or coming from your rear end. i bought brand new tires one time that made this god awefull rumbling noise and once i changed tires it was quiet again

the answer to this requires a pressure test. If it looses pressure, keep looking until you find it.

try putting lucas in it. that is a temp. fix altimtley you will need to replace the valves. also try running high test gas and see if that helps quiit it down at all

I have a 2002 with 130,000 and it ticks,but goes away after 2 min,if yours continues to tick you may have a rocker arm that is getting lose or a lifter that is not pumping up.

Get a manual from an auto parts store for your specific vehicle. It will give you all the information you need .

hi more than likley to be the alternator remove your fan belt start engine see if noise disapears yates210456