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2021 GMC Yukon XL Maintenance guide

2021 GMC Yukon XL Maintenance guide
v1.0Updated May 30, 2026·Ethan Miller4 Sources Analyzed5 Critical Recalls
MAINTENANCE SUMMARY

The 2021 GMC Yukon XL, with a 'Below Average' reliability verdict, demands vigilant maintenance, particularly for its engine and powertrain. Owners should focus on preventative checks for potential connecting rod/crankshaft issues and fuel pump control module failures, as these are significant concerns based on complaint data.

View Critical Issue: Engine Failure (Internal Components)
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Reliability Score

5.6/ 10

Est. Annual Maintenance Cost

$500 - $800

TSBs & Recalls

140 TSBs | 19 Recalls

SummaryMaintenance & CostsCommon FailuresSymptoms & PreventionKeep ReadingFAQSources

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Key Takeaways

  • The 2021 GMC Yukon XL has a 'Below Average' reliability rating.
  • Engine and powertrain issues are the most frequent and severe complaints.

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Critical service intervals
Common failure analysis
Symptoms and prevention guidance
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Full data sources and methodology
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MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

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Shop Parts

Quick links for routine service and common repair parts.

  • 5W-30 Synthetic Oil
  • Oil Filter
  • Synthetic Motor Oil
  • Cabin Air Filter
  • Engine Air Filter

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