The 2015 Chevrolet Tahoe steering system exhibits a cluster of interrelated electrical and mechanical failures. The most common complaint is intermittent or sudden loss of electric power steering assist, often occurring at low speeds during turns, parking, or highway driving. When assist drops, the steering wheel becomes dangerously heavy and difficult to turn. Some owners report the system restores suddenly with excessive play in the wheel; others describe complete steering locks.
Closely tied to these failures is a pattern of total electrical system shutdown while the vehicle is in motion. Owners lose engine power, all dashboard lights, headlights, power steering assist, and brake assist simultaneously. The shutdowns are erratic and occur at both highway and low speeds, sometimes triggered by window switches or turning actions. Many vehicles then restart automatically or require manual restart.
Steering column locks also occur unexpectedly, displaying a "LOCKED" warning on the dash even when the driver hasn't engaged the lock button. Accompanying this are clicking, popping, or grinding noises when turning the wheel—dealership bearing replacements have not resolved these noises, which return within days or immediately.
Mechanical steering components including racks, pinions, and tie rods fracture or seize without warning. Owners report steering wheels that fail to turn in response to input, wheels that go opposite to steering intent, and sudden uncontrollable vehicle movement.
Dealerships frequently cannot reproduce these failures during diagnostics, and repair attempts—even multiple dealer interventions—often fail to permanently resolve issues. Many affected vehicles fall outside recall coverage despite showing identical symptoms to recalled models.
Failure modes owners describe
Loss of Power Steering Assist / Steering Seizure
Intermittent or sudden loss of electric power steering (EPS) assist, leaving the steering wheel extremely heavy and difficult to turn. Ranges from complete loss to partial loss of assist, often triggered by low-speed turns or highway driving. Owners report the system either fails completely, restores suddenly with excess play in the wheel, or locks the steering wheel entirely.
When: Varies widely: low-speed turns (15-25 mph), parking maneuvers, highway speeds (45-80 mph), and at rest when starting vehicle. Some owners report multiple occurrences over weeks or months; others report initial incident followed by recurring failures.
Symptoms owners cite: Steering wheel becomes extremely difficult to turn or completely seized; Sudden loss of power steering assist mid-drive; Excessive play in steering wheel when assist suddenly returns; Steering wheel locks and displays 'LOCKED' warning on dash; Power Steering: Drive with Care / Service Power Steering warning light illuminates; Loss of vehicle control, particularly dangerous at speed or in traffic
Codes mentioned: Power Steering Assist Motor failure (implied by recall references), EPS software fault (referenced in recall 18289), Steering sensor failure
Repairs/costs cited: Recall 14743 involved replacement of power steering assist motor kit at no charge, though some owners report the replacement failed again after 12,000 miles or less. Dealership repair typically involves replacement of steering motor, steering gear (GM# 84368394, ~$2,250), or entire steering column. Some owners report repeat failures even after dealer repair.
Recalls/TSBs owners mention: Recall 14743 (power steering assist motor kit replacement); Recall 18289 (EPS software update in May 2019); NHTSA Campaign 18V586000 (steering); some owners' VINs not included in recalls despite identical symptoms; dealers often claim inability to reproduce failure; GM stated some vehicles out of warranty and failure classified as normal wear and tear.
Complete Electrical System / Engine Shutdown While Driving
Vehicle experiences total loss of electrical power and engine shutdown while in motion, occurring at both low and highway speeds. Power returns either instantly (at higher speeds) or requires manual restart (neutral, brake, start button at low speeds). During shutdown, owner loses all lights, steering power, braking assist, and visibility to other traffic.
When: Most common during low-speed maneuvers and turns, parking, backing up; also occurs at highway speeds (70-80 mph) following window switch actuation or without clear trigger. One owner reported 5 occurrences in 3 weeks of ownership; another reported 8-10 occurrences over time.
Symptoms owners cite: Engine and all electrical systems shut off while driving; Complete loss of dashboard lights and headlights; Loss of power steering (no assist available during shutdown); Loss of brake assist warning lights; Inability to steer vehicle manually when power is lost; Vehicle restarts either automatically (highway speeds) or requires manual restart (low speeds); Multiple warning lights (StabiliTrak, ABS, Power Steering, Brake Assist) illuminate upon restart
Codes mentioned: StabiliTrak warning, ABS warning, Battery/Power Saver warning, Brake Assist warning, Park Assist warning
Repairs/costs cited: Owners report dealerships unable to reproduce failure; no repairs completed in most cases. One owner reports alternator replacement followed by Power Steering fault, suggesting electrical system charging issue. Multiple owners note issue described as 'erratic' and inconsistent, resetting after vehicle is turned off and restarted.
Recalls/TSBs owners mention: No specific recalls cited by manufacturers for this failure mode; some owners report dealerships unable to find any issue; no manufacturer notifications recorded in most narratives.
Steering Column Lock and Malfunction Indicator Failures
Steering column locks unexpectedly during normal driving or parking, with 'LOCKED' warning displayed on dash. Locks occur without driver action on steering lock button. Clicking or grinding noise accompanies steering column operation. Owner experiences difficulty turning wheel even at standstill.
When: Occurs during parking maneuvers, after vehicle restart, at low speeds (15-25 mph), and occasionally while backing up. One owner reports lock engaging and disengaging multiple times over 2-3 minute period, then resolving after vehicle is turned off and restarted.
Symptoms owners cite: Steering column locks with 'LOCKED' message displayed on instrument panel; Steering wheel cannot be turned or turning is extremely difficult; Clicking or grinding noise when turning steering wheel left or right; Lock engages unexpectedly during driving or parking; Lock disengages after vehicle is restarted; 'StabiliTrak OFF' message displays alongside steering lock issue
Codes mentioned: Steering column sensor fault (replaced in one case), Steering bearing failure
Repairs/costs cited: Dealer replaced steering bearing; clicking noise returned within days. Another owner's steering column was completely replaced; clicking/grinding noise recurred one week later. One dealership acknowledged the issue but stated vehicle is safe to drive despite owner's concerns; owner refused to take vehicle until issue is resolved.
Recalls/TSBs owners mention: Dealerships acknowledge hearing and feeling the clicking/grinding noise but provide no definitive repair; some advised owners the vehicle is safe despite audible defect. One owner called GM asking about buyback program with no reported resolution.
Rack and Pinion / Steering Linkage Failures
Steering rack, pinion, tie rods, and associated steering linkage experience sudden fractures, seizing, or loss of function. Failures occur with or without warning and can cause sudden loss of steering control. Multiple repairs of the same components often fail to resolve issue.
When: Failures reported at low speeds (15-30 mph) during turns, at various highway speeds, and one case at 25,400 miles. One owner experienced repeated failures at 21,084 miles after multiple repairs.
Symptoms owners cite: Steering wheel suddenly difficult to turn; Steering wheel fails to respond to steering input (vehicle goes opposite direction of steering intent); Front wheel seizes or loses responsive control; StabiliTrak or ABS warning illuminates; Steering wheel vibration at speeds under 55 mph
Codes mentioned: Rack and pinion failure, Tie rod fracture, Steering sensor failure, Front wheel tie rod detachment
Repairs/costs cited: Repairs include replacement of rack and pinion, tie rods, bearing, gear kit, seal, gasket, and drive shaft rebalancing. One owner's vehicle failed twice after separate dealer repairs, then failed again at a third dealer. Estimated cost for steering gear replacement: ~$2,250. Some vehicles not repaired due to unclear diagnosis.
Recalls/TSBs owners mention: Recall 14V246000 (steering tie rod); some owner VINs not included in this recall despite fracture failures; NHTSA Campaign 14V719000 (steering sensor); manufacturers stated some VINs not eligible for recalls.
Steering Electrical Integration Issues (Vehicle Directional Anomalies)
Vehicle does not respond correctly to steering input when electric power systems malfunction. Vehicle proceeds in opposite direction of intended steering, or steering commands are ignored entirely. Often accompanied by warning lights and electrical glitches. One incident involved spontaneous shift into 4WD mode, causing difficult steering and jerking.
When: Occurs during turns and directional maneuvers; one owner experienced vehicle spontaneously shifting into 4WD mode during initial weeks of ownership despite dial set to 2WD.
Symptoms owners cite: Vehicle steers opposite to steering wheel input (steering wheel turned left but vehicle turns right, or vice versa); Steering commands ignored; vehicle does not turn in intended direction; Accompanied by 4WD malfunction or unexpected drivetrain behavior; Engine jerks or revs unexpectedly; Reverse gear malfunction; Multiple dash warning lights illuminate
Codes mentioned: Steering column sensor fault (replaced in one case), Electrical integration fault (cause not fully diagnosed)
Repairs/costs cited: One case involved steering column sensor replacement by independent mechanic. Dealer service manager acknowledged 'dangerous issue' and involved GM 'program manager.' Most cases not repaired or incomplete diagnosis obtained.
Recalls/TSBs owners mention: NHTSA Campaign 14V719000 (steering sensor); some owner VINs not included despite identical symptoms; dealers unable or unwilling to complete diagnosis in most cases.
Steering Bearing / Column Noise and Failure
Steering bearing fails, causing clicking, popping, or grinding noise when steering wheel is turned. Noise begins as minor clicking and progressively worsens. Bearing replacement by dealership does not resolve issue; noise returns immediately or within days.
When: Noise begins during normal steering maneuvers and worsens over time; grinding reported both at low speeds and highway driving; one owner experienced noise immediately after bearing replacement in dealer parking lot.
Symptoms owners cite: Clicking noise when turning steering wheel left or right; Popping sound during steering wheel turns; Grinding noise during steering maneuvers; Noise progresses from minor to severe over time; Noise returns immediately or within days after bearing replacement
Codes mentioned: Steering bearing failure
Repairs/costs cited: Dealership replaced steering bearing; noise recurred same day or shortly after. Dealership acknowledged hearing and feeling clicking but stated vehicle is safe; owner refused to accept vehicle. One dealership contacted engineers for additional guidance. GM Service Bulletin PIT5312 and PIT5452 reference this defect.
Recalls/TSBs owners mention: GM Service Bulletin PIT5312 and PIT5452 address steering column pops and clicks; dealerships reluctant to replace components again; some advised owners vehicle is safe despite audible noise.
Synthesized from 70 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.