GM Service Manual Online
For 1990-2009 cars only

J, L, and N Car Clearance Specifications

Application

Millimeters

Inches

All of the Exhaust System Components to all of the Underbody Components (Minimum)

25

1.0

All of the Heat Shields to the Underbody (Maximum)

15

.60

All of the Heat Shields to the Underbody (Minimum)

10

.40