crwdns2934241:0crwdne2934241:0 billhuffsr

crwdns2934249:0crwdne2934249:0:

not a good question because my 98 ck 1500 GMC only has 2 sensors. 1 upstream and one down stream. they are both new but the wirinf on the up stream has stopped working . code 134 and 155. no activity showing.

crwdns2915684:0crwdne2915684:0:

open