engine

Knock Sensor Torque Specs

for 2021 GMC Yukon XL 5.3L V8 · 4WD

Units

13 fasteners

Seq

Component

Torque

Angle

—

Cover Bolts

15 lb-ft · 20 Nm

—

Cover Bolts

15 lb-ft · 20 Nm

—

Electrical Connector Bolts

6 lb-ft · 8 Nm

—

Gasket Bolts

Critical

19 lb-ft · 25 Nm

—

Gasket Surface Bolts

Critical

Clean mating surfaces

19 lb-ft · 26 Nm

—

Knock Sensor

Critical

Torque critical for function

15 lb-ft · 20 Nm

—

Knock Sensors (Side)

Critical

Gen 4 (on block sides).

18 lb-ft · 25 Nm

—

Knock Sensors (Valley)

Critical

Gen 3 (in valley): Do not overtighten or sensor will be deaf.

15 lb-ft · 20 Nm

—

Mounting Bolts

Critical

44 lb-ft · 60 Nm

—

Mounting Bolts

Critical

44 lb-ft · 59 Nm

—

Mounting Bolts

25 lb-ft · 34 Nm

—

Sensor Bolts

10 lb-ft · 14 Nm

—

Sensor Mounting Bolts

10 lb-ft · 14 Nm

—

2021 GMC YUKON XL

13 fasteners