This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
full bulletin at NHTSA ↗2018 Cadillac XT5 steering problems
moderate 12 complaints filed with NHTSA · avg repair $700 · see steering across all vehicles →
Complaints
12
Recalls
0
Avg fix
$700
When does it fail?
Of the 12 steering complaints filed for the 2018 Cadillac XT5, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Steering accounts for 18% of all owner complaints filed against this vehicle, across 6 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering steering on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
full bulletin at NHTSA ↗This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
full bulletin at NHTSA ↗This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
full bulletin at NHTSA ↗This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report a recurring "Steering Assist Reduced—Drive with Caution" warning message appearing on the dashboard at various speeds, from low-speed town driving to 68 mph on the freeway. When the message appears, the steering wheel becomes noticeably harder to turn, requiring increased physical effort. One owner experienced complete steering failure while driving 45 mph on the interstate, losing control and running the vehicle off the road into a median with a loud pop sound; the crash deployed all airbags and caused broken bones, fractured ribs, and severe back and shoulder injuries.
Dealerships have diagnosed some instances as thermostat or coolant-temperature sensor faults (diagnostic code P0128), with repairs costing around $230 for sensor replacement. However, owners report that the warning continues to appear even after repairs. Other complaints show the warning recurring with no clear cause identified, and dealerships unable to reproduce the issue during inspection.
Several owners also report accompanying Stabilitrak warning lights flashing at highway speeds, sometimes with multiple simultaneous dashboard warnings. One complaint mentions a steering column popping noise present since purchase that multiple dealerships initially dismissed, only to later declare it unsafe and requiring immediate column replacement. Cadillac has issued Service Bulletin 17NA158 addressing the thermostat-to-steering-assist connection, but no recall has been issued for affected vehicles.
Same Cadillac XT5 steering reports on nearby years: 2017
Failure modes owners describe
Steering Assist Reduced warning with hard steering
Dashboard message 'Steering Assist Reduced' or 'Steering Assist is Reduced—Drive with Caution' accompanied by increased steering effort and difficulty turning the wheel. In one complaint, steering failed while driving on the interstate, causing loss of control, vehicle to run off road into median, loud pop sound, crash into embankment with all airbags deployed and injuries to occupants.
When: Various speeds; one complaint at 68 mph on freeway; one at highway speeds; one at low speeds at traffic light; one at under 40,000 miles; one at 37,282 miles; one at 32,000 miles
Symptoms owners cite: Dashboard warning 'Steering Assist Reduced' or 'Steering Assistance Reduced—Drive with Care'; Increased steering effort required; Difficult to turn steering wheel; Complete steering wheel malfunction (one complaint); Vehicle loss of control; Steering wheel swerves or pulls at highway speed
Codes mentioned: P0128
Repairs/costs cited: Owners cite thermostat replacement (cost ~$230 for sensor), battery replacement, steering column replacement. One radiator replacement due to leak. One vehicle totaled.
Recalls/TSBs owners mention: Service Bulletin 17NA158 referenced in one complaint; dealerships unable to reproduce issue in some cases; no recalls issued; manufacturer referred owners to local dealer with no corrective action offered
Stabilitrak warning light illumination
Stabilitrak warning light illuminates on dashboard, sometimes intermittently flashing on and off at highway speeds. In some cases, light turns off when accelerator pedal is depressed.
When: One complaint at 68 mph on freeway; one at 45 mph; one at traffic light (stationary)
Symptoms owners cite: Stabilitrak warning light illuminated; Light flashes on and off intermittently; Simultaneous with 'Reduced Steering Capacity' message in one complaint; Multiple unknown warning lights in one complaint
Popping noise from steering column
Popping noise heard when turning the steering wheel. Initially dismissed by multiple dealerships and CarMax as non-issue; later diagnosed as requiring steering column replacement. Complaint suggests dealer reluctance to address issue while vehicle under warranty.
When: Present from time of purchase (2019); issue recognized by dealership after warranty expiration
Symptoms owners cite: Popping noise when turning steering wheel; Noise present from purchase
Repairs/costs cited: Steering column replacement needed (repair cost not stated). Previously inspected at CarMax twice to three times post-purchase, Sewell Cadillac, and Sterling Cadillac—all initially found no issue.
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Dash alert: Steering Assist is ResucedDrive with Care I see this is a current problem with the 2018 Cadillac XT5 but my VIN doesn’t seem to be included. Please investigate why mine would not be included if I suddenly have the same issue.
When I get on the freeway and go around 68 mph my vehicle starts shaking and I constantly get a stabilitrak message that flashes on and off. I have to hold the steering will tight because it swerves a little and had to start driving away from cars. I took it to get the wheels balanced and it still does the same thing. The mechanic from the dealer ship I purchased the vehicle from said he could…
The contact owns a 2018 Cadillac XT5. The contact stated while the vehicle was stationary at a traffic light, the Stabilitrak warning light was illuminated for a short time and turned off when depressing on the accelerator pedal. The contact stated that on 11/19/2012, while his wife was driving 45 mph, the reduced steering capacity, pull over immediately and other multiple unknown warning lights…
Cadillac XT5 had a “steering assist is reduced” message on the driver information center. P0128 Code
Had steering trouble with your 2018 Cadillac XT5?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the steering problem on the 2018 Cadillac XT5?
It's a documented issue but not catastrophic. 12 complaints have been filed. Repairs average $700 and most owners catch it before it causes a breakdown.
At what mileage does the steering typically fail?
Based on the 12 complaints filed, steering issues most often appear around 32,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $700 for steering repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to steering?
No active recalls currently cover steering issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Cadillac/XT5.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.