Chevy blazer wont start 2002

The vacuum lines on a 1987 Chevy S10 Blazer are responsible for routing vacuum to various components such as the brake booster, EGR valve, and other systems.
A vacuum line diagram for your specific make and model of Chevy S10 Blazer can be found in the vehicle's service manual or in some cases, it can be found under the hood on a decal or sticker.
If the vacuum lines are loose, cracked, or damaged, it can cause various issues such as rough idle, stalling, poor performance, or even a failed emissions test.
It's best to consult the service manual, a professional mechanic or the dealer for proper diagnosis and repair of vacuum lines issues. These lines are crucial for the proper operation of many systems in the vehicle, so it's important to fix them as soon as possible if they are found to be damaged.

Did you pull the whole rotor shaft and housing out of the engine? If so it may be out of time. If not the vehicle is a smart system that can account for variances in wear on the timing gears. To repair this you need a class 2 scan tool and The best description of the issue is https://www.justanswer.com/chevy/0rq0a-getting-code-no-dtc-p1336-02-chevy.html

I don't think the anti-theft is the problem.
On GM vehicles, the anti-theft system will not allow the engine to crank, or get fuel or spark. If it cranks, you have a different problem.

Hey Tom if its rain, look to see if moisture is affecting wires a spray of WD-40 in and around electrical could really help and wont hurt any thing WD stands for =water dispersant.

Chilton and Haynes books are never free. You may get lucky and find a used one for a decent price. Your best bet may be to go online at "alldatadiy.com". This will cost about $30 a year but it is very vehicle specific. You input the year,make ,model, engine and transmission and they provide detailed repair instructions complete with diagrams.

If you left the security light on it probably killed your battery. You will need to jump start your vehicle or charge your battery as well as turn off your security light.

you can get faulty mass air flow meters.Make sure you perchaced the original from your dealers.There are a lote of copy types and they are not calabrated to your vehicle.Most copys are not calabrated.

check airflo sensor or potentometer,throttle pos sensor; if revs are to low when turning the wheel the power steering pump will draw power from engine, causing your other problems

nothing ..normal low pressure at idle while hot ...but really should be thinking fresh oil change and filter soon..also what are the RPM's at idle hot in gear with A/C radio and other accessories running?

you will probably have to replace tha actuator that operates the latch its about 30 bucks