GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Tightening Specification

3.1L (L82)

AC Type 41-940, gap at 1.52 mm (0.060 in)

15 N·m (11 lb ft)

3.8L (L36)

AC Type 41-921, gap at 1.52 mm (0.060 in)

15 N·m (11 lb ft)

3.8L (L67)

NGK Type PTR4B-15, gap at 1.52 mm (0.06 in)

Replace with AC Type 41-921, gap at 1.52 mm (0.060 in)

15 N·m (11 lb ft)