2007 GMC Canyon ABS Fault - Originally ABS Fault started when making a sharp right turn. (ABS Fault light only). Stopping and restarting would clear 'fault' until next hard right. Later, occasional metal on metal feel in pedal with ABS Fault activating sometimes. Next, mostly during a hard right, both ABS AND Brake lights would light. I initially replaced the front brake pads which cleared the brake light and the metal on metal feel. (Pads were NOT worn down to metal and rotors were not damaged.) I replaced both ABS sensors (4 Nov 13). There was some grease and dirt residue between the sensor ring and the bearing sensor. Now, when I press the pedal I get the metal on metal feel and a whining sound of a pressure pump. This is new. The 'pump' sound continues until I release the pedal. The ABS Fault will eventually light. I don't seem to have the hard right problem now however, a hard stop results in a pull to the right. Truck stops evenly on conventional braking (dry pavement). Plan to 'bleed' lines. Have not done a diagnostic check. Any suggestions?

"On a limb" but with even conventional braking caliper should be ok unless ABS makes difference. This AM along w/metal feel, have high pitch whin until ABS lighted, got brake light too, after 3 miles, stopped, restarted, same problem but NO brake light. Going to bleed front lines today. Oh, from beginning to now, w/ABS working, soft pedal when stopped, not so w/o ABS "On a limb" but with even conventional braking caliper should be ok unless ABS makes difference. This AM along w/metal feel, have high pitch whin until ABS lighted, got brake light too, after 3 miles, stopped, restarted, same problem but NO brake light. Going to bleed front lines today. Oh, from beginning to now, w/ABS working, soft pedal when stopped, not so w/o ABS

Just did diagnostic with codes C0035 (LF Spd Sensor voltage (new sensor)), C0220 (LF ABS channel in release too long), C0899 (Device Voltage Low), U1026 (No DTC definition), U1064 (Lost Comms w/BCM/Driver Info Mod). Also had codes B2725 (Active Transfer Case Mode Sw Ckt), P0455 (Evap Em Sys Leak, Gross). Codes read with CP9580A. Noticed soft pedal even with conventional braking. Just did diagnostic with codes C0035 (LF Spd Sensor voltage (new sensor)), C0220 (LF ABS channel in release too long), C0899 (Device Voltage Low), U1026 (No DTC definition), U1064 (Lost Comms w/BCM/Driver Info Mod). Also had codes B2725 (Active Transfer Case Mode Sw Ckt), P0455 (Evap Em Sys Leak, Gross). Codes read with CP9580A. Noticed soft pedal even with conventional braking.

Update-Tried to bleed brakes but someone rounded off the left bleeder nut (bought new. I've done all work on it since but never touched the bleeder valves.) plus, the valve is so rusted that liquid mechanic nor vicegrips would remove it. Will need an extractor. Managed to bleed right front. Now, I don't have metal feel in reverse and somewhat less going forward. I can heard the clicking noise and pump as it tries to set the ABS. Once the pump stops the ABS Fault lights. It just takes a little longer. A conventional brake quick stop activates the "Fluid" alarm although the resovior is full. Brake fluid needs replacing! It looks like used motor oil. My CP9180 ODBII doesn't read any codes not even the P0455. I still have a spongy pedal and descends when constant pressure apply but not all the way to the floor. I have both a safety and emissions inspection coming in Dec. Removing the ABS 1 (ABS Logic) & 2 (ABS Pump) fuses may get me past those inspections. I still need to change the fluid and bleed the lines to have good conventional braking. Hope someone out there has 'The Answer'. Thanks. Update-Tried to bleed brakes but someone rounded off the left bleeder nut (bought new. I've done all work on it since but never touched the bleeder valves.) plus, the valve is so rusted that liquid mechanic nor vicegrips would remove it. Will need an extractor. Managed to bleed right front. Now, I don't have metal feel in reverse and somewhat less going forward. I can heard the clicking noise and pump as it tries to set the ABS. Once the pump stops the ABS Fault lights. It just takes a little longer. A conventional brake quick stop activates the "Fluid" alarm although the resovior is full. Brake fluid needs replacing! It looks like used motor oil. My CP9180 ODBII doesn't read any codes not even the P0455. I still have a spongy pedal and descends when constant pressure apply but not all the way to the floor. I have both a safety and emissions inspection coming in Dec. Removing the ABS 1 (ABS Logic) & 2 (ABS Pump) fuses may get me past those inspections. I still need to change the fluid and bleed the lines to have good conventional braking. Hope someone out there has 'The Answer'. Thanks.