1998-2000 GMC Envoy Head Gaskets - Both Torque Specs

4.3L V6 Vortec

Applies to 1998, 1999, and 2000 GMC Envoy

Labor Time:18 hours

Torque Values (10 specifications)

Component	Nm	lb-ft	Notes
⚠️ Camshaft Cap Bolts	16	12	Torque sequence
Cover Bolts	19	14	—
⚠️ Cylinder Head Bolts	88	65	Multi-step + angle
Electrical Connector Bolts	8	6	—
⚠️ Exhaust Manifold Nuts	34	25	—
⚠️ Gasket Surface Bolts	23	17	Clean mating surfaces
⚠️ Intake Manifold Bolts	24	18	—
⚠️ Mounting Bolts	54	40	—
Sensor Mounting Bolts	12	9	—
⚠️ Valve Cover Bolts	14	10	—

The primary torque specification for head gaskets - both on a 1998-2000 GMC Envoy is 16 Nm (12 lb-ft). Note: Torque sequence

There are 10 torque specifications for head gaskets - both on the 1998-2000 GMC Envoy 4.3L V6 Vortec, covering all related fasteners and components.