1998 Chevrolet - warm engine slow to start

I have a 1998 Chevy Suburban. I've fixed several problems with the
vehicle and am left with two.

First the vehicle starts great when the engine is cold but, the
starter cranks very slow when it's warm. Almost like it is working
harder to start. I have had the battery tested and replaced the
alternator earlier.

The second problem has to do with the front and rear AC. The AC is
very cold in the rear of the vehicle but, the front part of this split
system in the dash is warm. I just replace the dash mounted AC/heater
control. I know the system is working because the rear section of the
vehicle is blowing out cold air.

Any help would be appreciated.

First you could have a starter going bad once it gets warm/hot from
engine temperature. The other thing that comes to mind is that the
timing is set too advanced. You will need to check and see if the
distributor is adjustable on your particular engine. If so, knock it
back a few degrees.

For the A/C, I can tell you about a Dodge Caravan w/rear A/C I once
owned. If the system began to get just a little low, the rear air was
ice cold and front would get luke warm. I would add 1 can and the
front would do great then. I had to add a can once every 2 summers. It
seemed the rear needed less charge to cool the evaperator than the
front.

Good luck, James