i have a 2001 sierra z-71 5.3l and when i fist try to start it it makes a lot of noise like its trying to start but doesnt so i crank it agan and it doesnt start but on the third try everytime it starts fine. it does this everytime i go anywhere. any ideas on what it is or better yet how to fix it?

 

this had to have happened to someone else on here. Someone please help its been doing this for over 6 months its killin me.

 

what kind of nose?..a loud,screeching gear-gnashing noise?..if thats it,then you have some teeth stripped off your flywheel

 

no it just makes the noise it usally makes when its trying to start but just doesnt start until i crank it 3 times.

 

Sound fuel related maybe losing presure try turning youre key on 3 times without starting it and then on the 4th see if it starts

 

Hey,

I have a 1998 Sierra 5.0 Litre and have the same problem as vettegator005, it does sound like a grinding or something, would this have anything to do with an oxygen sensor? cause it seems like when mine does it, it starts weak low rev's then goes back up to normal.

Thanks, Shawn

 

if its a loud grindinmg clashing..the starter-to flywheel teeth are worn down...an expensive repair.

if it sounds normal but is a longgg crank...on that 01...unplug the vacuum hose off your fuel regulator and see if its gassy....you may have to check it multiple times over a day or so to catch it.

its on ther drivers side of the intake..a little pot

 

I also have a 2001 Z71 and am experiencing the same problem. It almost seems like it may be a fuel regulator or, something like that. It seems like the fuel drains from the fuel rail back into the tank and it takes a few seconds for it to refill before it can start. I hear the pump so, I don't think it's that. I just want to avoid taking it to the dealer. Any thoughts?

 

had the same problem a few months back. changed the fuel pressure reg. never happened again.