I have a 2007 crewman ute when it is a hot day it will not start and when it start it runs poor then it runs good it happens on hot days

Ignition or engine fuse
Computer or car amobalizer

commmodores have a problem with the fuel hoses to the injectors and are known to split that hose and set fire to the engine
I would be seriously inspecting for split hoses , loose hose clamps etc

Usually the engines are the same in auto vs. Manul. However things like starter may not be.

then the switch is bad

Which brand? What kind of gasoline? Some cars doesn't run with all gasoline grades also there is some gas station with poor quality of gasoline.
Happened to my car too, I always use SHELL but one day I stop in the MOBIIL gas station to put some gas, got home and the next day the car won't start had to by the STP aditive to put in the gas tank. wait about 10 minutes and car starts fine.
Another thing is my car won't run good with all gasoline grades
I always use the regular one.

You have an intermittent problem in your start circuit. I'm sure you also have some choice phrases to describe it, go ahead and vent, we have all encountered frustrating problems.
The reason shops can't find it is because it isn't happening when they look at it. Anytime a hot engine is shut down a lot of heat is generated in the engine compartment. So opening the hood helps yours cool down faster and start quicker, a good clue. I believe if you had it at a shop when it won't start, they might find it. First thing they would check, or you could if you have a voltmeter or testlight, is if power is reaching the starter from the ignition switch in cranking position. This is the small wire on the starter solenoid. If there is power there when the engine won't crank, quickly reconnect the wire and verify if car will crank or not. If still nothing, it may be a poor ground wire(battery or engine ground) or a poor battery cable, since you know the starter is good. If you reconnect the wire and it suddenly starts working, it may have just been a loose connection on the wire you pulled off. If it keeps happening when your hot engine is shut off, test may have been invalid-intermittent problem has only now come back, so run the same test again.
If you or a tech ever find no power on the solenoid wire in START, that narrows it down to the path from the ignition switch to the starter solenoid. One needs to trace that path, looking for where the power is stopped. A couple of possibilities are the starter relay and the neutral safety switch. You could try a new inexpensive starter relay and see if that solves it. If not, then further testing needs to be done before giving up or throwing some expensive parts in and hoping. But you have narrowed it down which helps. It could be some arcane problem like a ground source for the starter relay, or who knows what. Have the start circuit checked, and it would be easier if the no crank condition is present when checked. Good luck.

Hi guys just wondering how to reset an SRS warning light? Changed drivers side pretensioner due to faulty wire and unsure if this has fixed the problem? I own a VZ 2007 crewman ute. Any advice on SRS light would be grateful and appreciated!

First get the car running.. then with the car running disconnect your battery... if your car dies then your alternator is bad if it stays running then alternator is good.. and you probably have another bad battery... make sure your battery connections are tight. and have the battery checked if all this is good then you need to further inspect your battery lines...

black smoke is the vehicle is running rich, to much fuel. excess fuel enters the cylinder and does not burn completely. poor fuel milage is also a common complaint when black smoke comes out tailpipe. ( its running rich ). have a good day !