2000 GMC Sierra - Page 6 - Answered Questions & Fixed issues

It's easy to flush your heater core. I use a garden hose. My same truck as yours, lost heat in the cab. I used the garden hose trick, and flushed the problem away. It's as easy as removing both heater hoses from the heater core, and using an old garden hose that I cut the end off. Luckily, it slipped right onto the heater core inlet. Hooked the garden hose to the water spigot and turned it on. Let it run for a couple minutes. The plug should wash away.

Check fluid level,check tie rod.

Do you have an aftermarket alarm system? if so disconnect the entire alarm system and retry.

check your terminals n make sure they are tight,also just because the battery is 6 mo. old dosen't it isn't already junk,check it too

Best Answer It should be under the coil where the spark plug wires attach to, basically it is a pain to get to i recommend buying a oil pressure switch socket to take it out, there's not a lot of room to work with since it is on the engine about 15 inches from the top next to the fire wall.I had to look up.

What size motor?

It sounds like a theft deterrent circuit has been activated.. Check your security device handbook on how to reset it.

I'v heard that the tilt wheel causes the wire to break. Most likely the wire has been broken. Somewhat easy fix.

The light is telling you the system does not see the right code in the key. The key could be faulty, or the sensor in the lock cylinder, or the module that controls the PASS system.If you have another key I would try it first.

Try this simple trick. Shut off every thing in your vehicle, radio, ac, lights, windshield wipers etc.Turn off the vehicle put it in park. Disconnect your battery , wait 5 minutes. Then Without turning any thing on leaving the vehicle in park reconnect the battery start the vehicle and let it Idle for approx 10 minutes. This allows your computer to reset all of your gauges. By assuring that everything is off your computer can concentrate on resetting everything correctly without missing a step . This will set your Idle and all of your Gauges. Whenever your battery is disconnected for what ever reason this step should be followed immediately upon reconnect.

Your thermostat could be staying open,not letting the coolant to get hot,or your heater core is bad,usually leaking by driver side floor board.

you have a bad idle air control valve and also a thottle position sensor. both sensors are located on the throttle body

Is it the front diff?Could be a wheel hub bearingHave you checked the diff oil levelor ever changed itMaybe the transfer case is the issue

Try some injector cleaner in order to see if the lean condition improves. Lean conditions can sometimes be caused by o2 sensors or other sensors that are not within specifications.

Did you have the new one tested when you bought it? If you buy the part from a parts place like Advance or Auto Zone you should always have it tested if possible because your getting re-manufactured parts 99% of the time. If its bad they will replace it again no problem as they have for me. Or it could be wiring problem, make sure you have good connections at all points and free of corrosion. Also have battery tested if you haven't already. There used to be a method to find out battery or alternator, crank up car, remove the battery. If it runs, battery problem. If it dies, alternator problem. Not sure if it still works with newer cars though.

DI YUO HAVE CODES

You have a faulty instrument cluster.Replace instrument cluster

Sparkplug gap should be .040.The trouble code P0161 is for a faulty oxygen sensor on the passenger side after the catalytic converter.The P0300 is a multiple misfire.It could be vacuum leaking around the intake manifold.

Behind the glove box

Check the rockers and if they are tight if not tighten them just enough to where you can twist the push rod with you fingers.Let me know if that works.