1998 GMC Sierra

#1

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.
Rob

#2

When won't start do you have spark, will it start with starting fluid, basic
diagnostics.
"BIG FISH 2006" <buckyevans (AT) webtv (DOT) net> wrote

Quote:

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.
Rob

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#3

Quote:

DID THEY CHANGE THE LINE FILTER?
I had the same problem on my 2000 and that did it. I don't know why heat

affects it but it did on mine.

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1998 GMC Sierra

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