The 2015 Suburban with 5.3L EcoTec3 is a capable workhorse, but the Gen V small-block suffers from catastrophic Active Fuel Management (AFM) failures that grenades engines, and the 6L80 transmission has a well-documented oil cooler flaw that contaminates fluid and ruins units prematurely.
AFM Lifter Failure Leading to Complete Engine Failure
Common · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Ticking/tapping noise from valve train that worsens with engine heat, Check engine light with P0300-series misfire codes or P0521 oil pressure, Metal shavings in oil, excessive oil consumption, Complete loss of power, knocking that leads to spun bearings and destroyed bottom end
Fix: AFM lifter bores wear oval, lifters collapse, push rods bend, cam lobes wipe out. Metal debris circulates and destroys bearings. Proper fix is full engine teardown, lifter replacement, AFM delete, or in severe cases complete short block or reman long block. 18-30 labor hours depending on severity.
Estimated cost: $4,500-9,500
Transmission Oil Cooler Line Failure and Cross-Contamination
Common · high severity
Typical onset: 70,000-120,000 mi
Symptoms: Transmission fluid mixing with coolant (strawberry milkshake in overflow tank), Harsh shifting, slipping, delayed engagement, Engine overheating from coolant loss, Transmission failure within days if not caught early
Fix: Factory cooler lines inside radiator corrode internally and rupture. Coolant enters trans, ATF enters coolant. Requires radiator replacement, full trans flush (often external cooler install), and if caught late, trans rebuild. This recall item (NHTSA) often manifests after warranty. 8-16 labor hours with trans service/rebuild.
Estimated cost: $1,200-5,000
Transmission Mount Collapse
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk on acceleration or deceleration, especially 1st to 2nd gear, Vibration at idle in drive, Visible sag or separation of rubber in mount
Fix: Rear trans mount rubber deteriorates from heat and weight of 6L80. Simple replacement takes 1.5-2 hours on lift with trans support. Use OE-grade mount, cheap aftermarket fail quickly.
Estimated cost: $250-450
Electric Power Steering Assist Motor Failure
Occasional · high severity
Typical onset: 90,000-140,000 mi
Symptoms: Sudden loss of power steering with 'Service Steering' message, Intermittent heavy steering, especially at low speeds, Grinding or clicking noise from steering column, DTC C0545 or C0550 stored
Fix: EPS motor or control module fails (two separate recalls on this system). Requires column disassembly and replacement of steering gear or assist motor. 3-4 labor hours. GM has extended warranty on some VINs but many expire before failure.
Estimated cost: $900-1,800
Carbon Buildup on Direct-Injection Valves
Occasional · medium severity
Typical onset: 100,000-150,000 mi
Symptoms: Rough idle, hesitation on acceleration, Reduced fuel economy, Misfires under load (P0300-series codes), Loss of power at highway speeds
Fix: Direct injection lacks port fuel to wash valves. Intake valves coat with carbon. Requires intake manifold removal and walnut shell blasting of all 16 valves. 6-8 labor hours. Some shops use chemical cleaners but results vary.
Estimated cost: $600-1,200
Transfer Case Encoder Motor Position Sensor Failure
Occasional · medium severity
Symptoms: Service 4WD light, unable to engage/disengage 4WD modes, Grinding or clicking from transfer case when switching modes, DTC C0374 or C0379, Stuck in 2WD or 4WD
Fix: Encoder motor on transfer case fails (recall issued but not all units covered). Motor replaceable without case removal. 2-3 labor hours. Some cases require full actuator replacement or internal mode fork wear diagnosis.
Estimated cost: $400-900
Brake Vacuum Pump Failure (with engine off assist)
Rare · high severity
Typical onset: 80,000-120,000 mi
Symptoms: Hard brake pedal, reduced braking power, Hissing noise from engine bay, Check engine light with P0556 (brake booster pressure sensor), Loss of power braking assist
Fix: Electric vacuum pump (used with AFM for brake assist when cylinders deactivate) fails. Recall issued but many units affected outside coverage. Pump replacement 2 hours labor. Critical safety item.
Estimated cost: $500-800
Owner tips
Disable AFM with a Range Technology or similar device immediately — this is the single best insurance policy against $8k engine replacement
Change transmission fluid every 40-50k miles with full-synthetic Dexron VI, ignore the 'lifetime fluid' marketing
Install auxiliary transmission cooler if towing regularly; factory cooler-in-radiator is undersized
Use Top Tier fuel and occasional Italian tune-up (high-RPM run) to minimize direct-injection carbon
Check coolant overflow for ATF contamination every oil change — catch the pink milkshake early
Buy only if AFM is already deleted or you budget $2k immediately for the delete; otherwise you're gambling on a $6-9k engine job before 120k miles.
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.
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SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING · 19V761000
2019-10-24
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Consequence: Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192261050.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM · 19V645000
2019-09-06 · PE18012
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
Consequence: As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.
STEERING:ELECTRIC POWER ASSIST SYSTEM · 18V586000
2018-09-07
General Motors LLC (GM) is recalling certain 2015 Chevrolet Silverado 1500, Tahoe and Suburban, GMC Sierra 1500 and Yukon, and Cadillac Escalade vehicles. Electric power steering (EPS) assist may be lost momentarily, followed by a sudden return of EPS assist.
Consequence: If EPS assist is lost and then suddenly returns, the driver may have difficulty steering the vehicle, especially at low speeds, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will update the EPS module software, free of charge. The recall began October 12, 2018. Owners may contact Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is 18289.
AIR BAGS:FRONTAL · 17V437000
2017-07-10
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
AIR BAGS:FRONTAL · 16V651000
2016-09-08
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
ELECTRICAL SYSTEM:IGNITION · 15V640000
2015-10-09
General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado and GMC Sierra trucks manufactured January 24, 2014, to February 26, 2014, 2015 Chevrolet Suburban vehicles manufactured February 12, 2014 and Chevrolet Tahoe vehicles manufactured February 6, 2014, to February 13, 2014. In the affected vehicles, the ignition lock actuator may bind, making turning the key difficult or causing the ignition to get stuck in the "Start" position.
Consequence: If stuck in the "Start" position, the ignition may suddenly snap back into the "Accessory" position, causing a loss of engine, steering, and braking power, increasing the risk of a vehicle crash. If the vehicle is in a crash, the air bags may not deploy, increasing the risk of occupant injury.
Remedy: GM will notify owners, and dealers will replace the ignition lock housing, free of charge. The recall began on November 20, 2015. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is 15573.
STEERING:ELECTRIC POWER ASSIST SYSTEM · 14V719000
2014-11-10
General Motors LLC (GM) is recalling certain model year 2015 Chevrolet Silverado, Suburban, Tahoe, GMC Sierra, and Yukon XL vehicles, equipped with electric power steering (EPS). Due to a problem with the EPS module, the affected vehicles may experience a sudden loss of power steering assist during vehicle operation.
Consequence: An unexpected loss of power steering increases the risk of a crash.
Remedy: GM will notify owners, and dealers will replace the power steering assist motor kit, free of charge. The recall began on November 17, 2014. Owners may contact GM customer service at 1-800-222-1020 (Chevrolet), or 1-800-462-8782 (GMC). GM's number for this recall is 14743.
AIR BAGS:SIDE/WINDOW · 14V451000
2014-07-23
General Motors LLC (GM) is recalling certain model year 2015 Chevrolet Suburban, Suburban LTZ, Tahoe, Tahoe LTZ, GMC Yukon, and Yukon XL Denali vehicles manufactured on May 13, 2014. The affected vehicles were assembled with a roof rail air bags (RRAB) that were not reinforced at the points were the bags contact the hardware used to attach the roof carrier.
Consequence: During deployment, the RRAB may be punctured or torn by the roof carrier hardware, reducing its performance and increasing the risk of occupant injury in the event of a crash.
Remedy: GM will notify owners, and dealers will replace the roof carrier attaching hardware, free of charge. The recall is expected to begin in early September 2014. Owners may contact GM customer service at 1-800-222-1020 (Chevrolet) or 1-800-462-8782 (GMC). GM's number for this recall is 14359.
POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) · 14V374000
2014-06-27
General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado and GMC Sierra vehicles, and model year 2015 GMC Yukon and Chevrolet Suburban and Tahoe vehicles. In the affected vehicles, an electrical signal short may cause the transfer case to shift to neutral without the driver's input.
Consequence: If the transfer case switches to neutral while the vehicle is parked and the parking brake is not in use, the vehicle may roll away increasing the risk of injury to bystanders. If the transfer case switches to neutral while the vehicle is being driven, the vehicle would lose drive power, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will re-program the software in the transfer case control module, free of charge. The recall began in early August 2014. Owners may contact General Motors customer service at 1-800-222-1020 (Chevrolet), or 1-800-462-8782 (GMC). GM's number for this recall is 14192.
POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES · 14V152000
2014-03-31
General Motors LLC (GM ) is recalling certain model year 2014 Chevrolet Silverado Light Duty Regular Cab, Double Cab, and Crew Cab 1500 series and model year 2015 Suburban and Tahoe; GMC model year 2014 Sierra Regular Cab, Double Cab, and Crew Cab 1500 Series and model year 2015 Yukon and Yukon XL vehicles equipped with a 6-Speed Automatic Transmission (feature code MYC). The subject vehicles may have a transmission oil cooler line that is not securely seated in the fitting.
Consequence: If the line is not securely seated and transmission oil leaks from the fitting, the oil could contact a hot surface and cause a vehicle fire.
Remedy: GM will notify owners, and dealers will inspect the transmission oil cooler line connection and repair the vehicles, as needed, free of charge. The recall began on May 19, 2014. Owners may contact Chevrolet at 1-866-694-6546 or GMC owners may contact GMC at 1-866-996-9463. GM's number for this recall is 14121.
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