I need d65px-12 work shop manual - Cars & Trucks

after working 25 minutes my shantui sd16 become over heat

The original OEM GM Shop Manual for that vehicle has EXCELLENT troubleshooting instructions for the HVAC system. I'd suggest you check eBay.

Yes You can the EXH and INT cams are different

Sounds like a relay or wiring harness connector is loosing connection when it gets hot. You may need a shop manual to get the wiring diagrams needed to troubleshoot the problem. It could also be the key switch.

Code 8 is for the crank or cam sensor circuit, and code 12 is for the EGR system.
You may need to get a used shop manual to have the testing procedures for the codes. The codes only tell the mechanic what to test.

You may need a shop manual or a repair shop to take a look at it.
The alternator has a built in volt regulator, and the regulator is controlled by the computer (PCM). About the only thing you can check without the book is the main battery line to make sure it is not open.
Everything else needs the shop manual and a scanner.

Replacing the heater core won't affect your freon. R-12 has become a rare bird, and is worth it's weight in gold. There are now synthetic freon that is available that can replace R-12, and can be found at most shops that do A/C work.

Jump the >A+ B terminals and Watch Check Engine Light, it Will Flash Codes, First One will be Code 12 1 Flash> Pause then 2 Flashes. and if there are Not Any it will Keep Flashing Code 12. < Code 12 is a Confermation Code that Shows #1 that you are IN ECM CODE READ MODE, and It Also Conferms the "END" of Read Session.

This happened to me. One of the brushes on the motor was worn down till it didn't touch the commutator. I bought a new brush from a starter rebuilding shop and soldered the wire myself. It works fine now. You need a brush from an automotive shop because at 12 volts, it draws a lot of current. So the brush has copper. A graphite brush from another motor shop wouldn't work.

Winshield wipers inoperative in all switch positions:

Does your windshield washer work? Check circuit breaker in fuse panel. If it is good then you may have either a bad wiper motor or switch. If you have a volt meter check the white wire (going off 93 wiring color code) on wiper motor connector with switch in low to see if you have 12 volts. If you have 12 volts then you may have a bad wiper motor. If you don't then you may have a bad switch. Hope this helps.