The 2014 Yukon XL 2500 with the 6.0L Vortec is a workhorse HD platform, but the LQ4/LQ9 generation 6.0L has documented issues with Active Fuel Management lifter failure and oil consumption from worn piston rings—leading to catastrophic engine damage if ignored.
AFM Lifter Collapse & Camshaft Wear
Common · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Check engine light with P0300-series misfire codes, Ticking or tapping noise from valve train, especially on cold start, Rough idle, Loss of power under load
Fix: Active Fuel Management lifters collapse due to oil starvation or debris, causing cam lobe wear. Repair requires both heads off, cam replacement, all 16 lifters, new AFM valley cover, and often AFM delete kit to prevent recurrence. 16-20 labor hours if no machine work needed.
Estimated cost: $3,500-6,000
Excessive Oil Consumption from Worn Piston Rings
Common · high severity
Typical onset: 100,000-180,000 mi
Symptoms: Burning 1+ quart every 500-1,000 miles, Blue smoke on startup or acceleration, Fouled spark plugs, Oil pressure fluctuations
Fix: Ring land carbon buildup and ring flutter on AFM-equipped engines cause blow-by. Many owners run it until rings completely fail. Proper fix is engine-out rebuild or short block replacement—20-26 labor hours including R&R and assembly.
Estimated cost: $5,500-9,000
Transmission Oil Cooler Line Leaks & Failure
Common · medium severity
Typical onset: 70,000-130,000 mi
Symptoms: Transmission fluid pooling under vehicle near radiator, Low transmission fluid warnings, Pink residue at radiator connection points, Slipping or delayed shifts if fluid level drops
Fix: Factory crimp-style cooler lines corrode at fittings or crack from vibration. Replace both lines, not just the leaker. Some shops also replace the in-radiator cooler if contamination suspected. 2-3 labor hours, flush required.
Estimated cost: $400-800
Transmission Mount Failure (6L90 Units)
Occasional · medium severity
Typical onset: 90,000-140,000 mi
Symptoms: Clunk when shifting into Drive or Reverse, Vibration at idle in gear, Visible transmission sag or excessive movement, Driveline shudder on acceleration
Fix: Rubber mount separates from bracket due to torque and heat. Requires jack support of transmission and crossmember removal. 1.5-2 labor hours.
Estimated cost: $250-450
Fuel Pump & Filter Assembly Failure
Occasional · medium severity
Typical onset: 100,000-160,000 mi
Symptoms: Hard starting after sitting, Intermittent stalling or hesitation under load, Whining noise from fuel tank area, Check engine light with lean codes (P0171/P0174)
Fix: In-tank pump module wears out; filter sock clogs with sediment. Requires tank drop on XL models due to length. Replace entire module, not just pump. 2.5-3.5 labor hours depending on tank fuel level and corrosion.
Estimated cost: $600-1,100
Cylinder Head Gasket Failure (Less Common but Expensive)
Rare · high severity
Typical onset: 120,000-200,000 mi
Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating, Milky oil on dipstick or cap, Combustion gases in coolant (test with block tester)
Fix: Usually occurs after repeated overheating or detonation from neglected maintenance. Both heads off, resurface if warped, new gaskets, ARP studs recommended. 12-16 labor hours plus machine shop time.
Estimated cost: $2,800-4,500
Owner tips
Disable AFM with a Range/ECM tune or install an AFM delete kit at first sign of lifter tick—it's cheaper than an engine
Run full-synthetic 5W-30 and change every 5,000 miles max; the 6.0L is sensitive to oil quality with AFM active
Check oil level every fill-up once past 100k miles—catch ring wear before it lunches the motor
Flush transmission fluid every 50k miles; the 6L90 behind the 6.0L runs hot in HD service
Inspect transmission cooler lines annually for seepage—catch leaks before they strand you
Capable tow rig and solid chassis, but the AFM-equipped 6.0L is a ticking time bomb—budget $4k-$6k for eventual AFM delete or engine work, or find a pre-AFM 2009-older 6.0L if you must have this platform.
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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Fitment notes: Side post terminals standard on GM full-size trucks and SUVs
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Every control module on the 2007-2014 GMC Yukon XL 2500 — 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.
📍 Inside transmission, integrated with valve body and solenoid assembly (6L80/6L90)
🔧 Tech 2 or GDS2/MDI with SPS
⚠️ TEHCM (Transmission Electro-Hydraulic Control Module). Requires transmission pan removal, fluid service. VIN programming mandatory.
Electric Power Steering Control Module (EPSCM)2.5 hr R&Rdealer / factory tool +0.8 hr2011-2014 models with electric power steering▸ programming details
📍 Integrated with steering column assembly, below instrument panel
🔧 Tech 2 or GDS2/MDI with SPS
⚠️ VIN programming and steering angle sensor calibration required. 2007-2010 use hydraulic power steering (no module).
Transfer Case Control Module (TCCM)2.5 hr R&Raftermarket tool +0.3 hr4WD models with electronic shift (NVG 261/263)▸ programming details
📍 Inside transfer case, integrated with encoder motor assembly
🔧 Tech 2, GDS2, or drive cycle
⚠️ Requires transfer case fluid service. Self-calibration via drive cycle possible.
Battery Energy Control Module (BECM)2.0 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Under rear cargo area or behind rear seat (Hybrid only)
🔧 Tech 2/MDI + SPS
⚠️ Hybrid models 2008-2013 only. High voltage system. VIN programming required.
⚠️ Not a separate module in GMT900. Gateway function integrated in BCM. No standalone 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.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 21V054000
2021-02-05 · EA15001
General Motors, LLC (GM) is recalling certain 2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A."
Additionally GM is recalling certain 2011-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, Yukon XL and 2011-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AZ, AR, DE, DC, IL, IN, KS, KY, MD, MO, NE, NV, NJ, NM, NC, OH, OK, PA, TN, VA, and WV or "Zone B."
Additionally, GM is recalling certain 2010-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL and 2010-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C."
These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.
Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 25, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed to 40 VIN owners on May 11, 2021. A second owner notification letter was mailed to all other owners on January 24, 2022. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328800.
ELECTRICAL SYSTEM · 14V614000
2014-10-01
General Motors LLC (GM) is recalling certain model year 2013-2014 Cadillac CTS, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL, and 2014 Buick Enclave, Chevrolet Express, Impala, Silverado HD, Traverse, GMC Acadia, Savana, and Sierra HD vehicles. In the affected vehicles, the chassis electronic module may be internally contaminated, resulting in an electrical short.
Consequence: If the module experiences an electrical short, the vehicle could stall, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will replace the chassis electronic module, free of charge. The recall began on December 26, 2014. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-458-006 (Cadillac), 1-800-222-1020 (Chevrolet), and 1-800-462-8782 (GMC). GMs number for this recall is 14515.
SERVICE BRAKES, HYDRAULIC · 13V342000
2013-08-06
General Motors is recalling certain model year 2014 Chevrolet Suburban vehicles manufactured July 9, 2013, through July 22, 2013; and 2014 Chevrolet Tahoe vehicles manufactured July 16, 2013, through July 23, 2013; and model year 2014 GMC Yukon vehicles manufactured July 13, 2013, through July 18, 2013; and model year 2014 GMC Yukon XL vehicles manufactured on July 22, 2013. The rear brake caliper bolts may not be fully tightened. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 135, "Light Vehicle Brake Systems."
Consequence: Loose caliper bolts may cause reduced braking performance and result in lengthened stopping distances, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will inspect the bolts on both rear brake caliper brackets. Any bolts found loose will be replaced and tightened. This service will be performed, at no charge. Owners may contact Chevrolet at 1-800-222-1020 and GMC at 1-800-462-8782. GM's recall number is 13247.
Performance
Horsepower
352hp
Torque
382lb-ft
0–60 mph
8.1sec
Quarter mile
16.2sec
Top speed
98mph
Capability & size
Towing capacity
9,600lb
Payload
1,898lb
Curb weight
6,084lb
Wiper blades
2014 GMT900 platform. Standard hook-type J-hook attachment on all positions.
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 2014 GMC Yukon XL 2500 6.0L V8 Vortec 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.