Back to 2021 GMC Sierra 2500HD

2021 GMC SIERRA 2500HD

6.6L V8 Duramax Diesel•4WD•AUTOMATIC•diesel•turbo

Repairs0 Labor586 Torque5921 Fluid9 DTC821 Battery0 Maintenance0 Recalls0

cooling

Heater Core Torque Specs

for 2021 GMC Sierra 2500HD 6.6L V8 Duramax Diesel · 4WD

Units

13 fasteners

Seq

Component

Torque

Angle

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Cover Screws

8 lb-ft · 11 Nm

—

—

Dashboard Screws

2 lb-ft · 3 Nm

—

—

Drain Petcock

Hand tight

7 lb-ft · 9 Nm

—

—

Fan Bolts

11 lb-ft · 15 Nm

—

—

Heater Core Mounting

6 lb-ft · 8 Nm

—

—

Heater Hose Clamps

2 lb-ft · 3 Nm

—

—

Hose Clamps

3 lb-ft · 4 Nm

—

—

Hose Clamps

Do not overtighten

4 lb-ft · 5 Nm

—

—

Housing Bolts

Critical

10 lb-ft · 14 Nm

—

—

Mounting Bolts

20 lb-ft · 27 Nm

—

—

Pump Bolts

Critical

Torque in sequence

24 lb-ft · 33 Nm

—

—

Pump Bolts

Critical

18 lb-ft · 24 Nm

—

—

Thermostat Housing Bolts

Critical

14 lb-ft · 19 Nm

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