1990-2004 GMC Sonoma Muffler Torque Specs

4.3L V6 Vortec

Applies to 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004 GMC Sonoma

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 1990-2004 GMC Sonoma is 54 Nm (40 lb-ft).

There are 6 torque specifications for muffler on the 1990-2004 GMC Sonoma 4.3L V6 Vortec, covering all related fasteners and components.