The 2015 Savana with the 6.0L Vortec V8 (LY6) is a workhorse van known for simplicity and payload capacity, but suffers from well-documented AFM (Active Fuel Management) cylinder deactivation failures that can grenade the bottom end, plus transmission cooler leaks that can kill the 6L80/6L90 if ignored.
AFM Lifter Collapse and Catastrophic Engine Failure
Common · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Rough idle with pronounced miss on cylinders 1, 4, 6, or 7, Check engine light with P0300-series misfire codes or P0174/P0171 lean codes, Metallic ticking or tapping from valve train that worsens with load, Sudden loss of power followed by catastrophic knock if lifter fragments travel to bearings
Fix: AFM lifters fail due to oil starvation, collapsing and wiping camshaft lobes. Early catch: lifter replacement and cam inspection, 8-12 hours labor. Late catch after bearing damage: short block or complete rebuild with AFM delete, 20-30 hours. Always includes AFM disabler tune or Range delete kit to prevent recurrence.
Estimated cost: $1,800-3,500 for lifters/cam; $6,500-9,500 for short block with AFM delete
Transmission Oil Cooler Line Failure and Cross-Contamination
Common · high severity
Typical onset: 70,000-130,000 mi
Symptoms: Pink or milky transmission fluid indicating coolant intrusion, Overheating transmission or erratic shifting after cooler breach, Coolant loss with no visible external leaks, Strawberry milkshake appearance in radiator or overflow tank
Fix: Factory cooler inside radiator develops internal leak, mixing ATF and coolant. Requires radiator replacement, complete transmission fluid system flush (often multiple flushes), and external cooler installation. If caught late, transmission internals are compromised and require rebuild. 6-8 hours for cooler/flush, add 15-20 for transmission rebuild.
Symptoms: Burning 1+ quart of oil every 500-1,000 miles, Blue smoke on cold start or heavy throttle, Fouled spark plugs on specific cylinders (often AFM cylinders 1, 4, 6, 7), Low compression readings on multiple cylinders
Fix: Ring land cracks or ring flutter from AFM pressure cycling. Oil control rings carbon up and lose tension. Fix requires engine disassembly, honing, new pistons and rings. Some shops do top-end overhaul (12-16 hours), but many opt for short block due to bearing wear from diluted oil (20-25 hours).
Estimated cost: $4,500-6,500 top-end refresh; $6,500-9,000 short block
Transmission Mount and Crossmember Deterioration
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk or bang on shifts, especially 1-2 or reverse engagement, Excessive drivetrain movement visible under throttle, Vibration at highway speeds that changes with load, U-joint-like sensation but U-joints test OK
Fix: Rubber transmission mount tears or collapses from weight and torque of loaded van. Crossmember can crack at welds on high-mileage commercial units. Mount replacement is 1.5-2 hours; crossmember adds another 2-3 hours if welding/replacement needed.
Estimated cost: $250-450 mount only; $600-1,200 with crossmember repair
Fuel Filter Housing Corrosion and Air Intrusion
Occasional · medium severity
Typical onset: 90,000-150,000 mi
Symptoms: Hard start or extended crank, especially after sitting overnight, Surging or hesitation under light throttle load, Loss of prime requiring multiple key-on cycles, Check engine light with fuel trim codes P0171/P0174
Fix: Filter housing on frame rail develops pinhole corrosion or O-ring failure, allowing air into fuel system. Replace housing assembly and bleed system, 1.5-2 hours. Often found during diagnosis of driveability complaints that mimic AFM issues.
Estimated cost: $300-550
Instrument Cluster Failure and Gauge Dropout
Occasional · low severity
Symptoms: Intermittent or permanent loss of speedometer, tachometer, or fuel gauge, Gauges sweep to max then drop to zero on startup, Odometer display flickers or goes blank, No correlation with temperature or specific driving conditions
Fix: Stepper motors or circuit board solder joints fail in cluster. Requires cluster removal and rebuild by specialist or replacement with programmed unit. Mileage must be programmed by dealer or with Tech2. 1.5-2 hours removal/install, plus rebuild time if outsourced.
Estimated cost: $350-650 rebuilt cluster exchange; $800-1,200 dealer new
Owner tips
Disable AFM immediately with a Range device or ECU tune—this is the single best prevention for catastrophic engine failure on the 6.0L
Install external transmission cooler and bypass factory internal cooler before 70K miles to prevent cross-contamination
Run high-quality synthetic 5W-30 (not 0W-20) and change every 4,000 miles to combat AFM lifter wear and ring carbon buildup
Check transmission fluid color every oil change—any pink tint means immediate radiator replacement is needed
Budget $8,000-10,000 reserve for potential engine work if buying above 100K miles without AFM delete documentation
Buy only if AFM is already deleted and transmission cooler has been addressed, or if you have $8K+ set aside for inevitable engine work—otherwise the 6.0L is a ticking time bomb wrapped in a solid chassis.
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: Side post terminals standard on GM full-size vans; battery located under hood
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Every control module on the 2014-2017 GMC Savana — 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.
📍 rear doors, integrated with camera assembly above license plate
🔧 GDS2 or Autel/Launch
⚠️ Camera calibration may be required after replacement
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.
General Motors, LLC (GM) is recalling certain 2003-2023 Chevrolet Express Cutaway and GMC Savana Cutaway incomplete vehicles equipped with wiring for an optional rear heating, ventilation, and air-conditioning (HVAC) system. When the HVAC blower motor circuit is left unused with exposed connectors and wiring, the circuit can corrode and overheat.
Consequence: An overheated electrical circuit increases the risk of a fire.
Remedy: Dealers will properly seal the rear HVAC blower motor circuits at the left side B-pillar, free of charge. Owner notification letters were mailed May 2, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GMC's number for this recall is N222386050.
VISIBILITY:POWER WINDOW DEVICES AND CONTROLS · 18V295000
2018-05-03
General Motors LLC (GM) is recalling certain 2014-2017 Chevrolet Express and GMC Savana vehicles equipped with power windows. Liquid may leak into the driver's power window switch and cause corrosion, resulting in high electrical resistance.
Consequence: High electrical resistance can increase the risk of a fire.
Remedy: GM will notify owners, and dealers will replace the driver side window switch, free of charge. The recall began August 10, 2018. 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 18155.
EQUIPMENT · 18V267000
2018-04-26
General Motors LLC (GM) is recalling certain 2009-2014 Chevrolet Silverado HD and GMC Sierra HD, 2009 GMC Topkick 5000, 6000, 7000 and 8000 Series and Isuzu F Series, and 2009-2018 Chevrolet Express, and GMC Savana vehicles, equipped with certain Plastic-Handle Fire Extinguishers or Push Button 'Pindicator' Fire Extinguishers. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or requiring excessive force to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17E062-5427.pdf
Consequence: In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.
Remedy: GM will notify owners, instructing them to contact Kidde to get a replacement fire extinguisher, free of charge. The recall began June 11, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020, GMC customer service at 1-800-462-8782, and Isuzu customer service at 1-866-441-9638. GM's number for this recall is 18146.
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS · 16V184000
2016-04-01
General Motors LLC (GM) is recalling certain model year 2014-2016 Chevrolet Express and GMC Savana incomplete vehicles equipped with a 159 inch wheel base manufactured August 2, 2013, to January 30, 2016. The affected vehicles were shipped to final stage manufacturers without a tire pressure monitoring system (TPMS). As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring Systems."
Consequence: Without a TPMS, the driver would not be alerted if one or more tires became under inflated. Driving with under inflated tires increases the risk of a crash.
Remedy: GM will notify owners, and dealers will install the hardware and software necessary to equip the vehicles with a TPMS, free of charge. The recall began on May 25, 2016. 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 15819.
Performance
Horsepower
342hp
Torque
373lb-ft
Fuel economy (EPA)
City
11mpg
Highway
16mpg
Combined
13mpg
Fuel
Regular Gasoline
Capability & size
Towing capacity
10,000lb
Payload
4,250lb
Curb weight
5,700lb
EPA class
Vans, Passenger Type
Wiper blades
Full-size cargo/passenger van, no rear wiper. Both blades are same length.
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 2015 GMC Savana 6.0L V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.