One problem related to brake antilock wheel speed sensor has been reported for the 2005 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Chevrolet Impala based on all problems reported for the 2005 Impala.
Intermittent warning "service traction system" which shut off both the traction system and the four wheel abs system (the safety issue). Regular braking still worked. Diagnosed at the shop as a faulty right rear wheel speed sensor, and the fault has apparently been corrected.