Owners consistently report engine failures on 2015 Cadillac Escalades, most commonly misfires and loss of power while driving at highway speeds. The most frequent complaint is a knocking or rattling noise followed by a check engine light and misfire codes affecting one or multiple cylinders. Several owners cite Chevrolet TSB 15-06-01-002F (Engine Misfire/Tick Noise) and question why no recall has been issued, especially given the safety risk of sudden power loss on interstates. Failures occur across a wide mileage range (53K to 201K), with many happening relatively early in the vehicle's life. Other reported engine failures include variable valve timing system failure, lifter and fuel injector failures, crankshaft failure, and complete engine seizure. One owner reports carbon monoxide fumes entering the cabin, resulting in hospitalization. Replacement engines are quoted between $17,000 and $20,000. Extended warranty coverage initially paid for some repairs, but later warranty companies declined coverage, leaving owners facing high out-of-pocket costs. A few owners note a loud grinding noise on cold start that dealerships claim is normal.
Failure modes owners describe
Engine Misfire / Knock
Engine develops knocking or rattling noise during operation, followed by misfire condition affecting one or multiple cylinders, loss of power, and engine shutdown. Occurs with or without check engine light illumination. Multiple owners cite awareness of Chevrolet TSB 15-06-01-002F (Engine Misfire/Tick Noise).
When: 89K, 53K, 113K, 93K, 65K miles; varies from early to mid-life of vehicle
Symptoms owners cite: Engine knocking or rattling noise; Check engine light flashing or illuminated; Traction/stability control lights illuminated; Vehicle shaking and vibrating; Loss of power while driving; Engine shutdown or failure to restart; Misfire codes on cylinders (various: #1, #3, #7, #8)
Codes mentioned: P0300, Misfire cylinder #1, Misfire cylinder #3, Misfire cylinders #7 and #8
Repairs/costs cited: Extended warranty covered some repairs; others charged $9,700–$20,000 for engine replacement or rebuild. Warranty companies have declined coverage in later failures.
Recalls/TSBs owners mention: Chevrolet TSB 15-06-01-002F (Engine Misfire/Tick Noise) referenced by multiple owners; owners question why no recall issued. One case opened with NHTSA referral.
Variable Valve Timing Failure
Variable valve timing system fails, causing internal engine damage. Owner reports abnormal knocking sound and illuminated check engine light at startup, with engine rebuild or replacement required.
When: 89K miles
Symptoms owners cite: Abnormal knocking sound from engine compartment; Check engine warning light illuminated
Codes mentioned: Variable valve timing failure
Repairs/costs cited: Engine rebuild or replacement needed; not repaired by owner
Recalls/TSBs owners mention: Manufacturer notified; case opened and owner referred to NHTSA Hotline. Related to NHTSA Campaign 25V274000 (Engine and Engine Cooling).
Lifter and Fuel Injector Failure
Lifters and fuel injectors fail, causing loss of motive power. In one case, lifter/camshaft failure occurred three times within 20,000 miles, sometimes without warning light.
When: 201K miles (one case); within last 20,000 miles (another case)
Symptoms owners cite: Loss of motive power while driving; Check engine light illuminated (or absent); Vehicle slowing and shaking; No notice before failure in some instances
Codes mentioned: Lifter failure, Fuel injector failure
Repairs/costs cited: Not repaired in one case; in repeat case, repaired three times within 20,000 miles
Recalls/TSBs owners mention: Manufacturer made aware; no specific TSB or recall mentioned
Crankshaft Failure
Crankshaft failure causes immediate loss of power upon starting, with no warning lights. Engine cannot be restarted.
When: 137K miles
Symptoms owners cite: Immediate loss of power upon starting; Unable to restart; No warning lights illuminated
Codes mentioned: Crankshaft failure
Repairs/costs cited: Not repaired by owner
Recalls/TSBs owners mention: Manufacturer notified; case opened and owner referred to NHTSA Hotline
Engine Seizure
Engine seizes internally and fails completely at relatively low mileage, preceded by engine knocking. Vehicle loses power and will not restart.
When: 53K miles
Symptoms owners cite: Noticeable knocking noise from engine; Sudden loss of power; Engine shutdown; Engine will not restart
Codes mentioned: Engine seized internally
Repairs/costs cited: Dealership quote approximately $20,000 for rebuilt engine replacement
Cold Start Engine Noise / Grinding
Loud grinding noise on cold start from engine compartment. Dealership claims this is normal operation; owner disputes this.
When: Unknown mileage
Symptoms owners cite: Loud grinding noise on cold start; Engine noise and vibration on cold start
Repairs/costs cited: Dealer service manager refused to repair, claiming noise is normal
Recalls/TSBs owners mention: Dealership refused to address under warranty, claiming all engines make this noise
Loss of Power / Unintended Shutdown
Engine loses power unexpectedly while driving at highway speeds or during startup, sometimes with white smoke from tailpipe. Multiple mileages affected. Onset can be sudden with minimal or no warning.
When: 65K, 93K, 170K miles; varies
Symptoms owners cite: Sudden loss of power while driving; Vehicle unable to restart; Check engine light illuminated (or absent); Temporary loss of power followed by recovery in one case; White heavy smoke from tailpipe; Vehicle shuddering and decelerating independently
Repairs/costs cited: Replacement engines quoted at $17,000 and higher; some repairs not completed due to cost
Recalls/TSBs owners mention: Owners note recall for 2021–2024 models for similar problem but no fix provided; unclear if applicable to 2015
Carbon Monoxide Exposure from Engine
Owner reports carbon monoxide fumes leaking into vehicle cabin during operation, causing owner to lose consciousness and requiring hospitalization. Family also affected.
When: Unknown mileage
Symptoms owners cite: Carbon monoxide fumes in cabin; Loss of consciousness while driving; Engine sputtering; Steering wheel lockup
Repairs/costs cited: Owner hospitalized for carbon monoxide poisoning; no repair details provided
Synthesized from 17 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.