GMC Sierra weird shut offs and revving up

Asked by Oct 10, 2019 at 02:17 AM about the 2004 GMC Sierra 1500 2 Dr SLE Standard Cab LB

Question type: Maintenance & Repair

My 2004 GMC Sierra has started to have a
light shudder occasionally while driving at
random intervals almost as if it is running out
of gas and if I am actively driving it, it will rev
back up to normal and perform as if nothing
has happened. At stop lights and stop signs
and such however the truck will do on of
three things: 1)Behave normally 2)truck will
shudder and shut off randomly 3)truck will
rev to around 2500-3000 for a short period of
time and then return to normal. My thought is
the fuel pump is occasionally not giving
enough gas, or giving too much while idle I g
but haven’t had time to test, is there any
other possibilities that this could be?

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