Question about 2004 Chevrolet Avalanche
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Posted on Jan 02, 2017
Are you getting the check engine light? If so the electronics may have gone out. You may not need a rebuild but you won't know till you pull the oil pan on the transmission and inspect the contents. You may also have lost the neutral safety switch. It is mounted on the drivers side of the transmission. Check those out first and let me know what codes you get.
For Ponchoboy; the clunking and hissing you hear are teminal root causes. Drop the oil pan and if it has a lot of filings and metal it is time for a rebuild.
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Posted on Feb 09, 2009
what i've seen with the k series chevrolet trucks is that the wheel speed sensors develop corrosion where the sensor mounts to the hub. you can start by taking the sensor out and cleaning off the mounting surface with a wire brush. the process is:
1. raise front of vehicle onto jackstands
2. remove front wheels
3. remove the brake caliper, bracket and rotor on both sides
4. remove wheel speed sensor via 1 torx bolt (be carefull as the corrosion will cause the sensor to "stick" in the hole)
5. clean the mating surfaces with a wire brush so the sensor bolt hole and mounting surface on the hub is shiney again.
6. if you can, pick up a can of rust preventing primer and spray a little on the surfaces to prevent further corrosion
7. let paint dry
8. apply a thin fil, of grease to the sensor and the sensor mounting spot on the hub
9. re-install sensor
10. revers steps 3-1 for re-installation.
*process is the same for both sides.
this was a common problem on the k series trucks.
while your in there it wouldn't be a bad idea to check the sensors wires to make sure they arent broken. let me know if the repair works for you
Posted on Feb 18, 2009
most any sensor going bad can cause the check engine light to come on,try disconnecting the posative battery cable for 15 seconds ,then put it back on,will reset the codes, or take it to auto zone,they will test your computer for codes at no charge to you.i had a venture van my was ox. sensor. thanks robert b.
Posted on Jun 17, 2009
I had that problem to last winter too. i took it to a shop and they told me it was the 4x4 switch. it is a common problem. I changed it and so far so good. It was an very easy fix. you just pop off the dash all the way around then you can take the switch out. there are two clips one on the top and one on the bottom. then all you half to do is un plug the wires and you are ready to put in the new one. it only cost me around $130.00 canadian.
Posted on Jul 19, 2009
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