GM Service Manual Online
For 1990-2009 cars only

Application

Millimeters

Inches

Tailpipe to rear facia/underbody (LH)

20-30

--

Tailpipe to rear facia/underbody (RH)

20-30

--

Resonator to tunnel rod (also referred to as the floor panel reinforcement bar)

16-26

--

Hanger to underbody

nominal

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