GM Service Manual Online
For 1990-2009 cars only

Object Number: 2020059  Size: MF

Callout

Component Name

Preliminary Procedure

Remove the catalytic converter. Refer to Catalytic Converter Replacement.

1

Heater Outlet Pipe Fastener (Qty: 2)

Caution: Refer to Fastener Caution in the Preface section.

Tighten
62 N·m (46 lb ft)

2

Heater Outlet Pipe

Tip
Do NOT remove the heater outlet pipe from the vehicle. Install a NEW O-ring.

3

Exhaust Manifold Lower Heat Shield Lower Fastener

Tighten
38 N·m (28 lb ft)

4

Exhaust Manifold Lower Heat Shield

5

Knock Sensor Fastener

Procedure

Disconnect the electrical connector.

Tighten
25 N·m (18 lb ft)

6

Knock Sensor