Chevrolet Avalanche Brake Questions
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If on the other hand your brakes haven't felt like this before I'd wonder at the dealerships finding nothing wrong. Except for in vehicles like the 04 Silverado, the spongy feeling usually means air in the brake lines. This requires that the brakes be bled to remove the trapped air. Since that's something that they could charge you money for I'd be surprised if this is actually the case with your Avalanche though. Dealerships seldom miss a chance to make money off of us sheep, er, customers.
As far as the braking sensor thing goes- I only know of two sensors related to the brakes (there may be more- I'm definitely no expert):
1) Brake-shift interlock. This doohickey is what keeps you from starting the Av or taking it out of "Park" unless your foot's on the brake pedal.
2) ABS sensors. These detect when one or more wheels loses traction during hard braking and automatically pulse the brakes.
I've heard of problems with both on 99-06 GM truck-based vehicles. But if you had problems with 1, you'd most likely be having issues either starting the Av or getting it into gear to actually take off. While problems with 2 range from a light on the dash informing you that there's a problem with the ABS system up to the brakes "pulsing" in situations where the ABS shouldn't be activating, as the sensors incorrectly "read" a wheel slipping. But trust me, speaking frome experience with my 04 Silverado, spongy brakes feel nothing like the pulsing of the pedal caused by the ABS system.
No complaints with either and night and day better than the '98 Dodge Dakota I had which would activate the ABS even on dry pavement and when it did, it felt like I had totally let off the brake pedal even though it was to the floor. The dealerships response? They all do that and they are known to have bad brakes. My boss went through a stopsign out here a couple days ago because he couldn't stop". They did nothing to fix it. I loved the truck, but it was the last Dodge I bought because of that and other problems.
Has anyone had problems stating their truck in the morning? Cause when I go to start it it doesnt want to start so I turn the key and wants to turn so I shut it off and turn the key again and it fires right away I havent had this problem since after I changed the brakes.
The bolts may be tight or a bit rusted. May have used loc-tite on the original bolts at the factory.
Anywone know that size? Thank you.
If you opened the line at the caliper, you will most likely need to do a full bleed at LEAST on the lines you did that on.
But if you have an 03, I'd be willing to bet the fluid has never been changed. Brake fluid absorbs moisture and looses effectiveness after a while. Follow proper brake bleeding techniques (easy to find) and start at passenger rear, driver rear, passenger front, then driver front and put all new fluid in. You'll have better lines and fresh fluid.
You may also want to check to ensure your calipers are securely attached to the caliper mount on the hubs.