Downpipe Torque Specifications

2002-2009 GMC Envoy 4.2L I6

Labor Time:2 hours

Torque Values (20 specifications)

Component	Nm	lb-ft	Notes
Cover Screws	11	8	—
Cover Screws	11	8	—
⚠️ Flange Bolts	47	35	—
Flange Bolts	47	35	—
Flange Bolts	47	35	Apply anti-seize
⚠️ Flange Bolts	47	35	Apply anti-seize
Hanger Bolts	20	15	—
Hanger Bolts	20	15	—
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
Mounting Bolts	27	20	—
Mounting Bolts	27	20	—
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 downpipe on a 2002-2009 GMC Envoy is 11 Nm (8 lb-ft).

There are 20 torque specifications for downpipe on the 2002-2009 GMC Envoy 4.2L I6, covering all related fasteners and components.