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Old 06-23-2015, 09:51 PM   #1
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Tow Vehicle

Getting ready for a trip and noticed a hum on front end. Jacked front end up and manually rotated wheels. I hear a clicking on both sides. Is this normal.
GMC 4x4 1500

Also replaced front brakes 3 times in 40K miles. Inner pads seem to be wearing out.? Back brakes are fine.


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Old 06-23-2015, 09:57 PM   #2
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The front calipers are sticking and need to be replaced, GM also had problems with the rubber brake line going to the wheel deteriorating on the inside and not allowing pressure off of the calipers.
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Old 06-23-2015, 10:01 PM   #3
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When I bought the truck front brakes were replaced.
20K later I noticed pads worn out;
I replaced pads not rotors they looked fine.
Again 20K later pads worn out. This time I replaced pads and rotors.
I was wondering about calipers hanging up.
Any way to test calipers or hoses.
Wheels seem to spin freely when on jack stands?


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Old 06-23-2015, 10:05 PM   #4
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Sound like calipers and would recommended ceramic pads as they last much longer, cleaner too. Be sure to bleed the brakes.
Had the same problem with brakes on my 1500 4x4. Every 25k new pads. Ceramic I get 40 plus k
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Old 06-23-2015, 10:09 PM   #5
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Does this have anything to do with my clicking?
Only heard while in jacks.


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Old 06-23-2015, 10:13 PM   #6
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The wheel speed sensors for the antilock brake system will sometimes make noise when they accumulate dirt.
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Old 06-23-2015, 10:14 PM   #7
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Does this have anything to do with my clicking?
Only heard while in jacks.


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Don't ever recall a clicking sound. Wheel bearings? or maybe dirt lodged in between the rotors and pads. Pull the calipers off and rotate the disc. Might have broken pads.
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Old 06-23-2015, 10:16 PM   #8
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Just replaced pads and rotors.




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Old 06-23-2015, 10:17 PM   #9
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Possibly anything to do with half shafts?


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Old 06-23-2015, 10:18 PM   #10
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The wheel speed sensors for the antilock brake system will sometimes make noise when they accumulate dirt.
That can also hinder braking performance. My old 98 1500 4x4 I had them changed out several times.
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Old 06-23-2015, 10:22 PM   #11
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Are the sensors a PITA to remove and check?


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Old 06-23-2015, 10:26 PM   #12
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Are the sensors a PITA to remove and check?


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pm sent. try youtube for videos. help me many times.
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Old 06-23-2015, 10:49 PM   #13
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If you remove the sensor can you clean the port out or is it all sealed non accessable other than changing sensor?


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