Control Valve Body Clean

WARNING: This page is about a different variant/trim than selected.

Fig 1: Blowing Air In Control Valve Body

Courtesy of GENERAL MOTORS CORP.

NOTE: Do not use solvent in order to clean the solenoid valves or the neoprene seals.

NOTE: In the following steps, handle the parts carefully in order to avoid nicks and scratches.

Move the valves with a pick or a small screwdriver in order to dislodge any dirt or debris.
Use an air nozzle in order to dry the control valve body and to blow out all of the passages.
Gently probe the small passages with a piece of identification tag wire or the equivalent.