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If you are asking these questions you should probably refer to the professionals. This vehicle is equipped with special wear indicators and ABS sensors and brake fluid contamination sensor all of which require special procedures for service. It will cost you alot less to have it done than to do it incorrectly or damage one of the systems or components.
This job varies depending upon the vehicles systems and options. You will probably pay around $400.00 plus posible reprogramming of the body control module. Contact your local shop for a complete estimate based on vin number and options.
This model is notorious for lower ball joints going out and squeaking because they are not equipped from the factory with grease zerts. Replacemnet of the ball joint is usually required with a MOOG part or other that has a grease fitting that allows it to be serviced regularly.
There should be ibnstructions in your owners manual but your local mechanic will probably be happy to replace it for a minimal or even no charge.
It sounds like the p.c.v. (positive crankcase ventilation) valve is not working. I would replace this and clean it up & see what happens.
Most likely it is the oil pressure sensor that is bad. It should be located directly above the oil filter or possibly on the back of the engine block between the heads and behind the intake manifold.
You must remove the entire front bumper cover & facia in order to remove the headlight lens and gain access to replace the bulb.
Absolutely! It is 100% necessary to flush your engine as any amount of water will destroy the copper/brass bearings (rod, main & cam) and will develop into an engine knock. We highly recommend the BG products. They have an engine oil flush with an addative for additional protection.
There is a blend door that controls the direction of air through the das either through the evaporator core for a/c or heater core for heat. This is usually connected to the controls via a cable. The cable is broken so he just manipulated it manually.
Your Sierra also has a dedicated ignition coil and ignition wire associated with each cylinder. These need to be tested to see if the are operating properly. If they are you must then check your fuel system for proper pressure and your fuel injectors for proper operation. You could wast alot of time & money changing parts but I recommend having it checked out professionally.
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