Sierra 1500 4WD V8-6.0L (2007)
other debris or restrictions are found, then reassemble the valve body and install in the transmission.
If the valve body has been contaminated with debris from another transmission component failure, then disassemble all bores for complete cleaning of all
valve body components. If possible, keep individual bore parts separated for ease of reassembly. Use the illustrations in this bulletin for a positive
identification and location of individual parts:
Using GM Brake Clean, or equivalent, in a safe and clean environment (clean aluminum pan), clean the valve body and dry it with compressed air. Use
appropriate eye protection.
Clean individual valve body components with GM Brake Clean, or equivalent. Coat each valve with clean ATF and reassemble in each bore. Check each
valve for free movement during assembly of each bore.
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