Why is my gmc abs light on?
My 99 gmc 1500 suburban 4×4 has a abs
light on..speedometer acts erratically and
transmision seems to not be shifting into
other gears. Shifts hard, then rpm's go up like
it's trying to shift. I replaced 3 speed sensors
and both front abs sensors. Is there a abs
ground on this suburban? I cant seem to find
it....