Hard start when hot

[Justinyukon]

So I have an issue with my 1998 Yukon. When it is cold or has sat for a length of time it starts perfect. But as soon as it warms up it hesitates to start. Hasn't failed me yet but cranking is very slow almost like it has a dead battery. Brand new starter and battery. Any ideas? Thanks

 

[retorq]

Ground cable from the battery to the frame? Frame to block?

 

[Justinyukon]

Replaced both already