Muffler Torque Specifications

1998-2000 GMC Envoy 4.3L V6 Vortec

Labor Time:1 hours

Torque Values (6 specifications)

Component	Nm	lb-ft	Notes
⚠️ Clamp Bolts	54	40	—
⚠️ Flange Bolts	41	30	Apply anti-seize
Hanger Bolts	20	15	—
Heat Shield Bolts	16	12	—
⚠️ Manifold Nuts	39	29	Apply anti-seize
⚠️ O2 Sensor	54	40	Apply anti-seize to threads

The primary torque specification for muffler on a 1998-2000 GMC Envoy is 54 Nm (40 lb-ft).

There are 6 torque specifications for muffler on the 1998-2000 GMC Envoy 4.3L V6 Vortec, covering all related fasteners and components.