Fuel Pump Control Module Failure

Failures in the fuel pump control module can lead to a sudden loss of engine power or complete shutdown while driving. This issue affects propulsion and can create hazardous situations. Estimated repair cost: $500 - $1,500.

Transmission Shifting Issues

Owners have reported transmission problems including rough shifting, delayed engagement, and valve body failures in the 10-speed automatic transmission. Estimated repair cost: $1,500 - $4,000.

Electrical System Malfunctions

Various electrical system issues have been reported, including warning lights, sensor failures, and problems with modules, impacting overall vehicle functionality. Estimated repair cost: $200 - $1,000.

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2021 GMC Yukon Maintenance guide

Name: Maintenance dataset for 2021 GMC Yukon
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed7 Critical Recalls

MAINTENANCE SUMMARY

The 2021 GMC Yukon, with its 6.2L V8 engine, faces significant concerns regarding internal component failures, specifically lifters, bearings, and crankshaft issues, as indicated by a major recall and numerous complaints. Preventative care should focus on diligent engine oil maintenance and early detection of related symptoms.

View Critical Issue: Engine Internal Component Failure (Lifters, Bearings, Crankshaft)

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Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

142 TSBs | 19 Recalls

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Key Takeaways

Prioritize engine health: The 6.2L V8 requires meticulous oil maintenance due to documented internal component failures.
Be vigilant for fuel system issues: Fuel pump control module failures can cause sudden power loss.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance