ABS light and a bunch of codes..

Envoy10

Original poster
Member
Dec 4, 2011
86
So a few days ago my Envoy started acting weird when braking. It always seems to happen when the truck slows down to the 10mph range which I can then hear the ABS. The ABS Light comes on and off, sometimes with the Parking Brake light and Service Brake System on the DIC. I went to AutoZone and had them check for codes. This is what i got, C0237, C0223, C0269, C0222, C0305, C0306, C0321, C0327, C0359, C0374, C0550. It's too late to take into a shop right now, so hoping someone can chime in in the mean time.
 

The_Roadie

Lifetime VIP Donor
Member
Nov 19, 2011
9,957
Portland, OR
Lots of historical discussion about the ABS controller ground, on the frame rail underneath the driver. Or the dashboard center ground, under the edge of the carpet on the side of the transmission tunnel.

Old and flaky wheel bearings can fire off the ABS at low speeds due to deteriorating sensors in the hubs. But that wouldn't typically cause comm errors like those codes.
 

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