[Flatrater]

A PCS or a "pressure control solenoid: is used to adjust trans line pressure, it is a duty cycle controlled solenoid.

I would recommend a dealer fixing it but most trans repair shops should be able to do it.

I really don't know the part price but the labor is about 5 hours, so depending on your labor rate will give you a ball park price.

Since your a tech you should be able to handle the job on your own. Really nothing hard to it just takes time. You will have to support the engine and trans because the engine cradle has to be lowered. Lower the cradle enough to remove all the bolts on the side cover of the trans, remove the left axle. Once the side cover is off its right there in the open. Only special tools you need is a engine support. After the PCS is replaced you would need to get a scanner and reset the taps or "trans adapts" which is a shift memory built into the PCM. Any trans shop or GM dealer can do it for you. If you don't reset adapts the trans will not shift right.