Main Valve Body Disassemble: Disassemble

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Compressing Control Relief Valve Spring

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: To prevent confusing parts during assembly, use J 33163 to store the removed valves, springs, and stops. See Special Tools .

Using J 43773 (2), compress the control relief spring until the retaining clip (1) is loose. See Special Tools .
Remove the clip.

Fig 2: Identifying Control Relief Spring & Control Relief Valve

Courtesy of GENERAL MOTORS CORP.

Remove the control relief spring (2) and the control relief valve (1).

Fig 3: Compressing Exhaust Pressure Regulator Valve Spring

Courtesy of GENERAL MOTORS CORP.

Using J 43773 (2), compress the exhaust pressure regulator valve spring until the retaining clip (1) is loose. See Special Tools .
Remove the clip.

Fig 4: Locating Exhaust Pressure Regulator Valve & Spring

Courtesy of GENERAL MOTORS CORP.

Remove exhaust pressure regulator valve spring (2) and exhaust pressure regulator valve (1).