Turn the key and nothing. Battery is hot. - Silverado 2500 Chevrolet Cars & Trucks

Make sure battery has a full charge and connections, positive and negative, all good. Use a digital multimeter across battery posts, everything off, the generic spec for a full charge is 12.6 volts. Leave meter leads touching battery posts, have helper turn key to crank, does voltage drop? How far?
If battery down, use a charger and get it charged up, check your charging system. Use a test light and check voltage at fuses in fuse box, some fuses hot all the time, some go hot with key on. good luck

When it does this check the fuel pressure.

I saw what you replaced, didn't see any testing? Make sure battery has a full charge and battery connections all good, that is positive and ground, both are important. Check fusible links where applicable? Do any electricals work, dash lites--headlamps--anything?
If needed check fuses in fuse box for voltage use a test lite. Some fuses are hot all the time, some go hot with the key on. Just pick any component that isn't working and is fuse protected, check voltage at the fuse.
The starter motor usually has two voltage circuits, one comes from the battery, hot all the time. The other circuit should go hot with key in the crank position and is wired through neutral or clutch switch, depending on the tranny. It is possible to be wired through starter relay, depending on the vehicle. Any starter testing, make sure tranny is in park or neutral and parking brake is set.
I need year--make--model.

Check the battery is fully charged, clean the battery posts and terminals, with a volt meter check for battery voltage on the battery side of the starter solenoid , if ok check for battery voltage on starter side of solenoid while starter engaged , if no voltage replace solenoid, if voltage fault in starter motor.

no CRANK
the first test. is jumper cable cranks.
the lights only use 1/50th the current of a starter, and dont prove anything. (eg. bad batteries do run lights great, can prove.)

juimp start it,
good, yes. bad battery; battery dischanged,or bad charging system
or left on the lights. too long.
bad jump, this means the cranking system is bad.
bad crank.
1: cables from battery to starter, corroded.
2: bad cables. split open and green copper everywhere.
3: I hot wire the stater solenoid, if fails (good battery and cables )
then it is a bad starter, (i hit it with a hammer, and bam it cranks
great tick to get of of big time trouble , far off grid or? danger zones...

4: hot wire fails.
bad KEY line.
if key oine fails wiggle the A/T shift handle, cranks now?
try neutral cranking, (fresher contacts here, magic happens)

IF a stick shift car nows the time.....

ask how to hot wire or look here.
see test 1 here "hot wiring techniques"

http://www.fixkick.com/nocrank.html

I have M/T and park on hills and start by rolling starts.
i dont need a good battery, in my 1968 xxxxx (1/2 joking)

Check battery cable connections. There should be a hot wire (hot at all times) to the ignition switch, and when key is turned the switch sends power out. Either the switch has lost the power in, or the switch is bad, not sending power out.
Do the headlights work? When key is turned to on, do the warning lights and gauges come on in the dash? Does the radio or any accessories work when key is turned? If nothing works, you need to check if the ignition switch is getting power from the battery.

My 2006 PT Cruiser has the same problem! When hot in the cab it won't start but after it is cool outside it starts up without missing a lick! When it is hot and you turn the key you get nothing but do have power to lights, radio, etc. weirdest thing ever and nobody knows why! We have had the ignition module replaced and have a new battery. This one has stumped everyone. Any suggestions folks?

If your car rolls over when you short the selonoid then the possibilities are limited.
The most likely is your neutral safety switch
the others are the ignition switch or damaged wiring.

try lookin at the wiring harness under the battery tray,seen them corrode there alot

Check your courtesy fuse, battery connections or test battery itself.