Equinox, Terrain & SRX ABS Module: Codes, Cost & Repair

Who this is for

• Your 2010-2017 Chevrolet Equinox or GMC Terrain has the ABS and traction lights on with a Service StabiliTrak or Service ABS message
• A scan tool pulled C0110, C0550 or U0121 and a shop quoted you a new ABS module
• You drive a 2010-2016 Cadillac SRX with the same lights and were told the part is no longer available
• You bought a new or used module and want to know why it will not just bolt in

Not sure the module is the problem yet? Read the ABS and traction-light guide first.

Do the Equinox, Terrain and SRX use the same ABS module?

The Equinox and Terrain do; the SRX does not. We checked GM's parts catalog first, because these three get lumped together online as GM Theta crossovers.

In GM's catalog listings for the Equinox and the Terrain, the same kit number covers both models in every year, across the 2.4L four-cylinder and the 3.0L and 3.6L V6s. No SRX number appears on either listing, so this guide treats the Equinox and Terrain as one module family and gives the SRX its own section below.

One trap: the kit number changed for 2011 and again for 2012, and your label often shows a hardware number, not the kit number. Send us what the label says.

What do the ABS, traction and StabiliTrak lights mean?

The EBCM is the electronic half of the ABS unit: a circuit board bolted to the hydraulic modulator that holds the pump and the valve block. It reads the four wheel-speed sensors, drives the valves and the pump motor, and runs anti-lock, traction control and StabiliTrak. When it detects an internal fault, it shuts all three off for the rest of the drive and lights the dash.

Normal braking stays, but the computer help is gone. A red brake warning light alongside the amber ones is a bigger deal: check the fluid and have the car looked at before you rely on it in a hard stop.

Is driving with StabiliTrak off a real risk? NHTSA's 2007 final report on electronic stability control found ESC cut fatal single-vehicle crashes by 63 percent and rollover involvement in fatal crashes by 88 percent in light trucks and vans, the class these crossovers fall into. A dead module takes that away.

Which codes point at the module, and which point somewhere else?

Read the ABS module's own codes - an engine-only code reader will not see them. Here is how they sort out:

ECU Testing, a module-rebuild specialist, lists C0110 and C0550 as the codes it finds when the 2010-2017 Equinox unit fails internally, and notes the failure can cut communication entirely. That is a genuine U0121.

The U-codes are where most money gets wasted. GM's preliminary information PIT5427B, published in November 2018 for all 2010-2017 Equinox and Terrain models, lists 18 different codes - U0121 among them, plus rear wheel-speed, yaw, steering and power codes - that can come from one place: corrosion in the X411 connector under the rear of the vehicle, behind and to the left of the fuel tank. The symptoms include Service ABS and Service Traction Control, and GM's fix is new terminals or a new connector at X411, not a module.

Some 2.4L cars have a second wiring trap. GM's PI1004 for 2012-2013 Equinox and Terrain 2.4L models links a check-engine light, Service StabiliTrak and the same U0121-family codes to chafed wires in the engine harness rubbing on the back of the engine. The fix is a wire repair, not a module.

Why does the Equinox and Terrain ABS module fail?

Three things wear these modules out, and none of them is your driving.

Heat cycling. The module is bolted to the hydraulic unit in the engine bay. Every drive heats the board and every cold start shrinks it, and years of that fatigue the solder joints where heavy pins carry current. A cracked joint can work for months, then open on a cold morning or a pothole - which is why these failures often start intermittent.

Current. The module switches the pump motor and the valve coils, so its driver stages carry real load. A failed pump driver is a classic cause of C0110.

Memory and processor faults. A module that corrupts its memory or fails its own self-checks sets C0550. It may stay awake but refuse to run the system, or drop off the network.

Water does its damage mostly outside the box. GM was already flagging X411 corrosion in 2015 - its PIT5400 blames the connector's spot under the vehicle, near the rear wheel. That is a connector fault, not a module fault. Our ABS internal-failure guide shows how each failure looks on the board.

Repair, new or used: what does each option really cost?

New first. GM lists the 2012-2017 Equinox and Terrain kit, 22754644, at $1,145.46 MSRP, about $637 at online GM dealer discount. The 2010 kit lists at $585.62; the 2011 kit shows no current price. Installed, RepairPal's Equinox estimate runs $1,280 to $1,342 for 2012-2017 model years and roughly $710 to $783 for 2010-2011, with labor estimated at $184 to $269. Its Terrain estimate matches year for year - it is the same part.

Used is cheaper up front, but it carries the donor vehicle's VIN and calibration, has to be programmed to yours, and may already be on its way to the same failure.

Repair keeps what you have: $499 flat for the module you already own, with a 1-year warranty you can extend to 2 years (+$50), 3 years (+$100) or 5 years (+$150) at checkout. Its VIN and calibration never change.

For how these quotes get built, see what an ABS module repair really costs. One honest limit: our repair is electronics. A mechanically failed pump motor or valve block needs a hydraulic-unit replacement, and a bad wheel-speed sensor is an on-car fix. If testing shows your module cannot be repaired, we tell you first and quote a replacement before any extra charge.

Why does a replacement module have to be programmed?

Because the module carries your vehicle's identity: the VIN and a calibration matched to the build, down to options such as forward collision alert. GM's bulletin PI1492 for 2012-2015 Equinox and Terrain models shows how tight that link is: a brake-module calibration could make the vehicle feel as if it was slowing early when forward collision alert activated, and GM's fix was to reprogram the EBCM through its "Electronic Brake Control Module Programming and Setup" procedure. The bulletin also warns that a module without the correct calibration software will not control every vehicle feature properly.

Skip that step and you get the classic loop: new part, same lights. We cover it in replaced the ABS module and the light is still on, and the GM-wide version in our GM EBCM programming guide.

Our GM ABS/EBCM programming and setup service ($250, typical 24-hour bench turnaround) is built around the 2014-2020 K2 trucks and SUVs. For an Equinox, Terrain or SRX replacement, send us the VIN and part number first and we confirm whether we can set it up before you ship. Repairing your original skips the question.

Cadillac SRX (2010-2016): why is its ABS module so hard to replace?

The SRX has its own module and its own problem: supply.

GM's SRX catalog listing shows three EBCM kits - 25896031 for 2010 (2.8L and 3.0L), 20842710 for 2011-2016, and 22783391 for some 2013-2016 3.6L cars. Kit 20842710 is marked discontinued. The other two, 25896031 and 22783391, list at $508.12 and $492.24 with a $150 core charge, but are flagged unavailable because of a manufacturer supply shortage. RepairPal's SRX estimate of $782 to $891 installed assumes you can get the part.

Owners have learned that the hard way. NHTSA's complaint file for the 2015 SRX includes several owners told the module was discontinued or no longer made, one who waited a month at a dealer for part 20842710, and one whose mechanic read C056D, a module hardware fault.

C056D is the SRX family's internal-fault code. The SRX shares its platform with the 2011-2012 Saab 9-4X - GM recalled both together under NHTSA campaign 21V473 - and Saab's 9-4X workshop manual breaks C056D into memory, checksum and self-test failures inside the module, with ABS, traction and stability control switched off when it sets. Its C0110 test puts the pump-motor relay inside the EBCM and the motor in the hydraulic modulator.

For an SRX owner, repairing the original is the practical path, not just the cheaper one: it keeps its VIN and calibration, so there is no hunt for a discontinued part and no programming appointment.

What do you remove and ship?

In most cases, ship the electronic module, not the whole ABS unit. GM sells the Equinox and Terrain EBCM as its own kit, separate from the hydraulic valve block. On the SRX family, the 9-4X removal procedure in the same manual unbolts the module and pulls it off the modulator, which stays in the vehicle with no brake line disconnected. Two of its cautions apply to all of these: unplug the connector only with the ignition off, and never pry the module off the valve block.

1. Text or email us the label part number, your VIN and the ABS codes. A label photo is ideal. We confirm the unit and the codes before you ship.
2. We email you a prepaid inbound shipping label. Shipping it to us costs you nothing.
3. We repair and bench-test it - about a week on the bench after it arrives, or 2-3 business days with rush repair (+$100).
4. We ship it back at the speed you chose at checkout: standard $29.95 (3-5 days), UPS 2-Day $54.95 or UPS overnight $94.95.
5. You reinstall it. It keeps its original programming, so in most cases it is plug-and-play.

Do you have to bleed the brakes after install?

It depends on what came apart. If only the electronic module came off the modulator and the brake lines stayed connected, no fluid was opened and there is nothing to bleed. If the whole ABS unit came out with the lines disconnected, the hydraulic side needs a proper bleed. When air may have reached the modulator, GM's answer is a scan-tool Automated Bleed - its bulletin PIC5468C, written for the Impala, shows it run from the EBCM's Special Functions menu. A firm, high pedal and a road test finish the job.

A real-world example

We do not publish outcomes we do not have yet, so here are two current jobs exactly where they stand on October 16, 2026.

The Equinox: A 2012 Chevrolet Equinox 2LT with the 2.4L. The owner ordered the repair on October 3 and chose UPS 2-Day for the return. The module arrived October 7 and is in the bench queue. On October 16 we texted the owner that it is running a little past our usual week - a delay you hear about from us beats one you discover on a tracking page.

The SRX: A 2013 Cadillac SRX with the 3.6L, ordered October 12. It has not been worked yet.

What happens on the bench: In general, we inspect the connector for corrosion, power the module up, read its fault memory, test the pump and valve driver circuits and the solder joints, repair the failed circuit and bench-test before it ships. If a module cannot be repaired, the owner hears it from us, with a replacement quote, before any extra charge.

Net: Both jobs are in progress, and we will not guess at results. Expect the same process, including a text if we run late.

What experts say

"On these GM crossovers we want the code list and a label photo before anything ships. A U0121 buried in rear-sensor and yaw codes points at the wiring first. A C0110 or C0550 that returns with good power and ground at the connector points inside the module - and repairing that original keeps the VIN and calibration GM wrote into it, so it goes back in without a programming appointment." — Auto Module Lab bench team

The regulator makes the safety case. Per NHTSA's final report on ESC effectiveness, stability control reduced fatal run-off-road crashes by 70 percent in light trucks and vans.

Frequently asked questions

Why are the ABS, traction and StabiliTrak lights all on at once on my Equinox or Terrain?

Those systems share one electronic brake control module, so an internal fault switches off anti-lock, traction control and StabiliTrak together and lights all three warnings. That is the most common cause, but GM also ties the same messages to a corroded X411 connector under the vehicle, and one bad wheel-speed sensor can set them too.

What do codes C0110, C0550 and U0121 mean on these crossovers?

C0110 is a pump motor circuit fault, usually the driver inside the module that runs the pump. C0550 means the module failed its own internal performance checks. U0121 means the vehicle lost communication with the ABS module, because either the module or its wiring failed - so check X411 first when U0121 shows up with other network codes.

How much does a new Equinox ABS module cost compared with repairing mine?

GM lists the 2012-2017 Equinox and Terrain EBCM kit at $1,145.46 MSRP, and RepairPal estimates the installed replacement at $1,280 to $1,342 for those years, with programming still required. Repairing the module you own is $499 flat with a 1-year warranty, and because it keeps its original VIN and calibration it usually reinstalls with no programming.

Does a new or used ABS module need to be programmed?

Yes. The module carries your VIN and a calibration matched to the vehicle's build and options, and GM sets it up through its Electronic Brake Control Module Programming and Setup procedure. Without that step the lights can stay on or the module may not communicate. Repairing your original avoids it, because its identity never changes.

Is the Cadillac SRX ABS module the same as the Equinox module?

No. GM's catalog gives the 2010-2016 SRX its own EBCM kits - 25896031, 20842710 and 22783391 - and none is listed for the Equinox or Terrain. The main 2011-2016 kit is marked discontinued and the other two are flagged unavailable, so repairing the original is often the only practical fix on an SRX.

Do I need to bleed the brakes after reinstalling the module?

Only if the hydraulic side was opened. If the electronic module came off the valve block with the brake lines left connected, there is nothing to bleed. If the whole ABS unit came out, the brakes need a proper bleed - including GM's scan-tool Automated Bleed when air may have reached the modulator - and a road test.

The bottom line

On a 2010-2017 Equinox or Terrain, ABS, traction and StabiliTrak lights together - especially with C0110 or C0550 - usually mean the electronic brake control module has failed internally. With U0121 and a spread of network codes, check GM's X411 connector before you spend money. A new module for a 2012-2017 model runs well over a thousand dollars installed and still needs programming; repairing yours is $499 flat and keeps its original programming.

The SRX is a separate module with a supply problem - its new kits are discontinued or unavailable - so the original is the one worth saving.

Next steps

Pull the codes, photograph the module label and send us the part number, VIN and codes; we confirm the application before you ship. The repair itself is on our ABS module repair page. If you already bought a replacement that needs setting up, start with the GM ABS/EBCM programming page, and see everything else we handle on the services page.