The 2020 GMC Savana with the 6.0L V8 (L96) is a workhorse platform that's generally robust, but suffers from well-documented AFM lifter failures and transmission cooling issues that can lead to catastrophic engine damage if ignored. High-mileage units frequently need bottom-end work due to piston slap and bearing wear.
Symptoms: Loud ticking or knocking from engine at idle, especially when warm, Check engine light with P0300-series misfire codes or P0521 oil pressure codes, Loss of power, rough idle, excessive valve train noise
Fix: AFM lifters collapse and damage cam lobes. Requires heads-off cylinder deactivation delete, all lifters replaced, often camshaft replacement. 16-24 labor hours depending on additional damage. Many shops recommend full AFM delete kit with tuning to prevent recurrence.
Estimated cost: $3,500-6,500
Piston Slap / Ring Land Failure
Occasional · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Cold-start knock that diminishes after warm-up (piston slap), Excessive oil consumption, blue smoke on deceleration, Loss of compression, misfire codes, metal shavings in oil
Fix: Piston skirts wear, ring lands crack. Requires full shortblock or engine rebuild with pistons, rings, bearings, honing. 25-35 labor hours for rebuild, 18-22 for reman shortblock swap. Often found after lifter failure diagnostics.
Estimated cost: $5,000-9,000
Transmission Oil Cooler Line Leaks / Cooler Failure
Common · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Transmission fluid leaking from lines at radiator or remote cooler, Burnt transmission fluid smell, brownish fluid under vehicle, Transmission overheating, harsh shifts, delayed engagement after fluid loss
Fix: Cooler lines corrode at fittings, integrated radiator coolers crack internally. Line replacement 2-3 hours, auxiliary cooler add/replace 3-4 hours. Often requires transmission fluid flush after repair. Some techs add external cooler as insurance.
Estimated cost: $400-1,200
Transmission Mount Failure
Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk or thud when shifting from park to drive/reverse, Excessive drivetrain vibration, especially under acceleration, Visible sagging or torn rubber on crossmember mount
Fix: Rubber mount deteriorates from heat and load cycling, especially on cargo variants. Replacement straightforward, 1.5-2.5 hours depending on exhaust clearance. Inspect all engine/trans mounts simultaneously.
Symptoms: Hard starting, long crank times especially when hot, Loss of power under load, sputtering at highway speeds, Fuel pump whine or buzz audible from tank area
Fix: Despite being gas, the 6.0L is sensitive to fuel contamination. Filter on frame rail clogs prematurely with ethanol sludge or tank sediment. Replace every 30,000 mi instead of GM's longer interval. 0.8-1.2 hours labor.
Fix: Harnesses rub on frame rails or crossmembers, especially near transmission and rear axle. Upfitter circuits often installed poorly from factory. Diagnosis 1-3 hours, repair depends on location. NHTSA recall addressed some rear harness routing issues but not all.
Estimated cost: $200-800
Owner tips
Disable AFM via tuner or install AFM delete kit as preventive measure if buying high-mileage
Change oil every 3,000-4,000 mi with quality synthetic (0W-20 or 5W-30) to extend lifter/bearing life
Install auxiliary transmission cooler if towing or hauling regularly — factory cooling is marginal
Replace fuel filter every 30,000 mi regardless of service manual interval
Inspect transmission cooler lines annually for corrosion, especially in salt-belt states
Solid platform for commercial use if you budget for AFM lifter failure and stay aggressive on fluid changes — avoid high-mileage examples without documented AFM delete or recent engine work.
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; battery located under hood on driver side
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Every control module on the 2018-2026 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.
Tire Pressure Monitor Control Module (TPMS)no coding▸ programming details
📍 integrated within BCM
⚠️ TPMS receiver integrated into BCM; sensor relearn via scan tool or manual procedure
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.
TIRES · 21V115000
2021-02-25
General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC Savana, 2019-2020 Chevrolet Blazer, Silverado 1500, GMC Acadia, Sierra 1500, and certain Continental tires sold to the aftermarket for various model year 2018-2021 vehicles. The affected tires were cured for too long during production.
Consequence: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will inspect the tires, replacing them as necessary, free of charge. The recall began March 22, 2021. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N212329050.
Performance
Horsepower
341hp
Torque
373lb-ft
Capability & size
Towing capacity
10,000lb
Payload
4,250lb
Curb weight
5,700lb
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 2020 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 Lexus & Toyota Mechanic · 20+ years.