My ABS and T/C (traction Control) lights on my 2004 chevy avalanche are on. I recently replaced the U-joints and the brakes. after replacing the U-joints, a week later the light came on. Any idea what to do?? I pulled front ABS sensors and cleaned and T/C button will not stay pressed in when pushed.

SOURCE: nissan quest 2004 problem

Check the level of your brake fluid, if it is low it will sometimes put all these warnings lights on together. If you find its low it is most likely due to the fact that you need your brake pads replaced. You can test this by adding a little fluid to the resevoir (just enough to shut off the lights). Do not fill to the top cause when you do replace the pads the fluid will get pushed back into the resevoir and overflow. Hope this helps.

SOURCE: chevy avalanche transmission trouble

its usally the other way around,theres a broken hard part in your tranny.it wont let the pump ingage to releive pressure fom clutches,in turn wont go into drive.sorry, but thats going to be expensive.get extended warrenty and then turn it in before contacting the dealer.

SOURCE: abs light is on? 2004 chevy avalanche

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

SOURCE: abs , brake, traction control light on in 04 lesabre

check to make sure that all the the bulbs in the rear are working,even the third light

Marvin

• 85242 Answers
• Posted on Oct 05, 2009

SOURCE: 2004 chevy avalanche with dual control system problem

this problem is caused in almost all cases by a failed actuator that moves the door insiode the heating/ac duct to change the outlet temperature, it is called the Air Temperature Control Blend Door actuator.