Questions & Answers for: GMC Sierra conditioner knocking noise

...noise if I turn on the air conditioner. Not sure if air conditioner is actually working as it is in the 20's - 30's right now and any air coming out is COLD. open glove box and make sure that none of ...

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knocking noise from the bellhousing. as i start to accelerate it goes away but at idle or low rpm it is there. it has gone away for a couple days then came back(a few different times). i was told that

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...knocking noise but once it warms up it goes away, what could be causing this? We really need to know more about what kind of knocking you are hearing. Pinging, clink clink, sounds like the time you ...

Knocking noise on passenger side under dash. Starts when the engine is turned on or off and when the air conditioner is turned on or off. sounds like you have a loose fan cage for the ac/heater.

I have a 2003 gmc Sierra half ton 4.8 liter that has a knock that sounds like lifters The noise sounds like lifters it is always there when it is running . Oil pressure is good. Is there anything else

Question about 2008 Sierra Denali

1 Answer

...knocking noise or any other kind of noise. --------- For step by step troubleshooting this problem, I suggest you to refer the help links mentioned below. Its a complete solution with proper ...

I had a code showing two faulty knock sensors. I changed out both and the code has come back. Any suggestions? you have to know how works knock sensor.PCM supply 5V or 12Volts then if there is engine ...

...noise v6 engine knocking sound and squeaking check for play in the distributor sometimes the slop will make the pick up window under the cap will hit the distributor cap , the squeaking noise may be ...

Question about 1992 Sierra

1 Answer

engine knocks when running. it knocks all the time but if you engage clutch half way it stops Manual transmission ?? Noise coming from Engine ?? Transmission ?? These rigs are notorious for crankshaft

...a knocking noise and shaking badly My truck started knocking about 2 months ago and just yesterday started shaking badly, what could the cause be. You say knocking where the engine or somewhere

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