I have a 1998 gmc Sierra 5.7 vortec with 84,000 miles. Whenever the
outside temp gets around 90 degrees and I drive my truck for awhile, it
won't start for about 20 min. after I turn it off, I must allow it to
cool. Had a new fuel pump installed twice, changed the fuel pump relay
and still having the same problem. Can someone please help me.
Thanks in advance.