Need a repair manual for a chevy 2002 2500hd 4wd with gas engine

The service and repair manual with pictures and diagram will provide you step by step knowledge to solve the problem easily and you will get the manual from the given link https://toolsnyou.com

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https://www.reliable-store.com/products/chevy-silverado-sierra-1998-2006-workshop-service-repair-manual

I recommend you get a repair manual.

Try here http://www.manualslib.com/
or here if they have it. http://www.filepeep.com/

We do not have repair manuals, you must purchase the rights to access them. You can do that here.

Check air filter, valve on hose leading to engine, and electrical connection on air intake hose.... vacuum in gas tank loosen gas cap and reseal...bad gas can do this to fill with known good gas and run a tank...spark plugs need replacing @ 100,000 Ks or 60,000 Ms the manual recommends 100,000 but many mechanics have reported that the lower mileage is the actual.....

There is an electric actuator on the front axle that engages 4WD. This part commonly fails resulting in no 4WD. Unhook the electrical connector to this part and see if heater still blows fuses. If It does not blow the fuse, the problem is in the actuator. If it still blows the fuse then it could be in the wiring. Buy a repair manual and trace the wiring schematics.

There is a free online repair manual at www.autozone.com It is also free to register. It gives step by step directions with pics.

You may contact a GM dealer for assitance in getting a manual for that year and model.
I would also recommend getting a good repair manual for that vehicle. The savings for one repair will more than offset the price of the repair book. I use manuals produced by Haynes which can be found in most auto supply stores like Advanced Automotive or Auto Zone.

probaly dont have a problem your truck probaly has a gas engaged 4 wheel dr modual and what you hear is the gas modual engaging