Chevrolet Silverado / GMC Sierra. Service manual — part 1817

Fig. 95: View Of Various Connectors & Clips
Courtesy of GENERAL MOTORS CORP.

12. For vehicles equipped with 2 wheel drive (2WD) perform the following steps, for vehicles

equipped with 4 wheel drive (4WD) proceed to step 15.

13. Remove the left front CPA retainer.

14. Disconnect the left front HO2S electrical connector (7) from the engine wiring harness

electrical connector (6).

2008 Chevrolet Silverado 1500

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

Fig. 96: View Of Various Connectors & Clips
Courtesy of GENERAL MOTORS CORP.

15. For vehicles equipped with 4WD perform the following steps, remove the left front CPA

retainer.

16. Disconnect the engine wiring harness electrical connector (7) from the left front HO2S

electrical connector (8).

17. Remove the left front HO2S electrical connector clip from the fuel line clip (2).

2008 Chevrolet Silverado 1500

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

Fig. 97: View Of Catalytic Converter To Muffler Nuts
Courtesy of GENERAL MOTORS CORP.

18. Remove the catalytic converter to muffler nuts.

2008 Chevrolet Silverado 1500

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

Fig. 98: View Of Exhaust Manifold Nuts & Exhaust Seals
Courtesy of GENERAL MOTORS CORP.

19. Remove the catalytic converter to exhaust manifold nuts (1).

20. Separate the catalytic converter assembly from the exhaust manifolds.

21. Remove the catalytic converter assembly from the exhaust muffler.

22. If replacing the catalytic converter assembly, perform the following steps, otherwise

proceed to step 4 in the installation procedure.

23. Remove the exhaust seals (2 and 3).

2008 Chevrolet Silverado 1500

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