Won't crank nor start then it will.
Yes I have a 2007 GMC Sierra
5.3L SLE1 4 DOOR EXT. Cab that
will not crank nor start then you
can wait a day or 2 and it will start
and run perfectly. This has been
going on for over a year. Also
when you turn the key over the
dash lights come on the radio
plays the headlights burn the horn
works practically everything
works except for it cranking and
turning over to start. The only
light that will not illuminate is
what gear you have the shifter in
it's the little green line that the
position that tells you whether it's
in park, neutral, drive, 1, 2, 3. All of
the grounds on the truck are good
and clean. Also all of the
electrical checks out to be good
as well. The battery is good the
fuel pump is turning on and the
starter is working as it should
when crossing over the relay for
the starter it will turn over but the
truck will not crank. You can go
out and try to start it and it might
start up and then you go back
later and it won't. Then like back
in the summer it ran all summer
no problems and now it's winter
time and it's acting up again. I
was told it was the fuel pump
modular they said it controls
signals to the starter but I've
never heard that just like a
second opinion before I go spend
a 285 on a fuel pump modulator
and then pay GM to program it? I
would really like to get this fixed
this has really caused a lot of
issues. Also my OBD2 isn't
showing any codes. The only
code that it shows is an airbag
sensor is bad and check engine
light is on only for that reason.
Any Help would be greatly
appreciated.
