Muffler Torque Specifications

2002-2009 GMC Envoy 4.2L I6

Labor Time:1 hours

Torque Values (14 specifications)

Component	Nm	lb-ft	Notes
⚠️ Clamp Bolts	54	40	—
Clamp Bolts	54	40	—
⚠️ Flange Bolts	41	30	Apply anti-seize
Flange Bolts	41	30	Apply anti-seize
Hanger Bolts	20	15	—
Hanger Bolts	20	15	—
Heat Shield Bolts	14	10	—
Heat Shield Bolts	14	10	—
⚠️ Manifold Nuts	34	25	Apply anti-seize
Manifold Nuts	34	25	Apply anti-seize
⚠️ O2 Sensor	47	35	Apply anti-seize to threads
⚠️ O2 Sensor	47	35	—
O2 Sensor	47	35	—
O2 Sensor	47	35	Apply anti-seize to threads

The primary torque specification for muffler on a 2002-2009 GMC Envoy is 54 Nm (40 lb-ft).

There are 14 torque specifications for muffler on the 2002-2009 GMC Envoy 4.2L I6, covering all related fasteners and components.