The 2019 ATS is a capable luxury sport sedan let down by catastrophic 2.0T engine failures and transmission cooling issues. The 2.0L turbo four is a ticking time bomb after 60k miles, while the 3.6L V6 is significantly more reliable but thirsty.
2.0T Catastrophic Engine Failure (Piston Ring / Bearing Collapse)
Common · high severity
Typical onset: 60,000-110,000 mi
Symptoms: excessive oil consumption (1qt per 1000mi or worse), timing chain rattle on cold start, metallic knocking under load, low oil pressure warning, loss of power, check engine light with misfire codes
Fix: Total engine replacement or rebuild required. Piston rings fail from carbon buildup causing oil burning, followed by bearing starvation. GM extended warranty to 120k/10yr on some VINs but many fall outside coverage. 18-25 labor hours for short block swap, more for full rebuild.
Estimated cost: $6,500-12,000
Transmission Oil Cooler Line Leaks
Common · high severity
Typical onset: 50,000-90,000 mi
Symptoms: transmission fluid puddles under vehicle, burnt transmission fluid smell, slipping gears or delayed engagement, overheating transmission temp warning, pink fluid leaking near radiator area
Fix: Cooler lines corrode where they connect to radiator and transmission. Must replace both lines and often the external cooler itself. Flush transmission fluid. 3-5 labor hours depending on access.
Estimated cost: $800-1,400
Transmission Mount Failure
Occasional · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: harsh clunk when shifting from park to drive, excessive vibration at idle, transmission movement visible under acceleration, knocking sound over bumps
Fix: Hydraulic transmission mount collapses, especially on 2.0T models with aggressive driving. Replace mount and inspect for fluid leaks. 2-3 labor hours.
Estimated cost: $350-650
High Pressure Fuel Pump Failure (2.0T)
Occasional · high severity
Typical onset: 80,000-130,000 mi
Symptoms: hard starting when engine is hot, loss of power under acceleration, rough idle and hesitation, fuel smell in cabin, check engine light with fuel pressure codes P0087/P0088
Fix: Direct injection high-pressure pump fails internally, contaminating fuel system. Must replace pump, filter, and flush fuel lines. Often requires injector cleaning. 4-6 labor hours.
Estimated cost: $1,200-2,200
CUE Infotainment System Freeze / Screen Failure
Common · low severity
Symptoms: touchscreen unresponsive, system reboots randomly, backup camera black screen, climate controls frozen, Bluetooth disconnects
Fix: CUE system notorious for software glitches and screen delamination. Software updates help temporarily but hardware replacement often needed. 2-3 labor hours for module replacement.
Estimated cost: $800-1,800
Timing Chain Stretch (2.0T)
Occasional · high severity
Typical onset: 90,000-140,000 mi
Symptoms: rattling on cold start for 3-5 seconds, check engine light with cam/crank correlation codes, rough running, reduced fuel economy, engine stalling in severe cases
Fix: Timing chain stretches due to oil quality issues and high-pressure turbo system. Requires chain, guides, tensioner, and often VVT solenoids. Do NOT delay—chain failure causes valve-piston contact. 8-12 labor hours.
Estimated cost: $2,000-3,500
Owner tips
If buying a 2.0T, demand oil consumption test and compression check—walk away if it burns more than 1qt per 3000mi
Change oil every 5,000 miles maximum on the 2.0T with full synthetic—extended intervals kill these engines
Inspect transmission cooler lines annually for corrosion, especially in salt-belt states
The 3.6L V6 is far more durable than the 2.0T but gets poor fuel economy—consider it the 'reliability tax'
Check for GM TSB coverage on your VIN for the 2.0T engine—some have extended powertrain warranty to 120k miles
Avoid the 2.0T unless you enjoy expensive surprises; the V6 is worth seeking out, but even then there are better luxury sport sedans at this price point.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: AGM battery required; located in trunk; V6 models require higher CCA than 4-cylinder
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Every control module on the 2013-2019 Cadillac ATS — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Requires sensor calibration; may be integrated with RVCM on later models
Rear Vision Camera Module (RVCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Rear trunk lid or integrated into camera assembly
🔧 GM MDI or scan tool
⚠️ Backup camera standard 2013+; calibration usually automatic
Seat Control Module (SCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Under driver and passenger seats
🔧 GM MDI or scan tool
⚠️ Memory seats have individual modules per seat; heated/cooled seat control
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2019 Cadillac ATS 3.6L V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.