ABS traction control

2010GMC

MEMBER
2010 GMC C1500
5.3L
V8
4WD
AUTOMATIC
42,000 MILES

ABS, traction control off, service stabilitrak, e-brake light all on. Started intermittent would come on (chime) and go back out. This lasted about two days. I knew my front brakes were getting down so I replaced front brakes, checked wheel hubs and wires (all looked good) when I was done the intermittent stopped and lights are on full time now. Checked codes, 121 loss of communication with ABS control module. Checked fuses and ground. Now I am unsure of what to try?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,602 POSTS

It sounds like you have an ABS controller that is going bad.

Here is a guide that will show you how to get the problem fixed:

https://www.2carpros.com/articles/how-to-replace-a-abs-controller

Please let us know what happens.

Cheers, Ken

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Thursday, August 24th, 2017 AT 12:16 PM

2010GMC

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2 POSTS

Haven't repaired yet but more codes now. U0073. Speedometer is bouncing around and transmission shifting funny sometimes?

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Thursday, August 31st, 2017 AT 4:50 PM

KEN L

MASTER CERTIFIED MECHANIC
47,602 POSTS

Opps, that is a bad sign. I am thinking the ABS controller is out. I would try a used one so you can plug and play. But first check all fuses here is a guide.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here is its location (below)

1 - Air Intake Duct
2 - X111
3 - Fuse Block - Underhood X2
4 - X109
5 - X110 (NQF/NQG/NQH)
6 - Engine Control Module (ECM) X2
7 - Engine Control Module (ECM) X1
8 - G102
9 - J105

1 - Battery - Right
2 - Fuse Holder
3 - X127
4 - X108
5 - X107
6 - X123 (PTO)
7 - Fuse Block - Underhood
8 - X109
9 - Battery - Left
10 - Engine Control Module (ECM)
11 - Transmission Control Module (TCM)

1 - Mega Fuse Ring Terminal
2 - X175 (M30)
3 - J128
4 - J105
5 - J106
6 - J130 (M30 with NQG/NQH)
7 - Engine Control Module (ECM) X1
8 - Engine Control Module (ECM) X2
9 - G103
10 - X112
11 - Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector

Please let us know what you find.

Cheers, Ken

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