Chevrolet Silverado / GMC Sierra. Service manual — part 1829

Fig. 141: View Of Catalytic Converter
Courtesy of GENERAL MOTORS CORP.

17. Remove the left catalytic converter.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 142: View Of Catalytic Converter HO2S
Courtesy of GENERAL MOTORS CORP.

18. If the left catalytic converter is being replaced, remove the HO2S (1 and 4).

Installation Procedure

IMPORTANT: A special anti-seize compound is used on the HO2S threads. The

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

compound consists of liquid graphite and glass beads. The
graphite tends to burn away, but the glass beads remain, making
the sensor easier to remove. New, or service replacement
sensors already have the compound applied to the threads. If the
sensor is removed from an exhaust component and if for any
reason the sensor is to be reinstalled, the threads must have the
anti-seize compound applied before the reinstallation.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 143: View Of Catalytic Converter HO2S
Courtesy of GENERAL MOTORS CORP.

1. If the left catalytic converter was replaced, perform the following steps:

1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado