Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Chevrolet for this TSB. Call your local Chevrolet dealer's service department & ask for a copy of TSB# PIT-4883.
Affected Component: STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
GMC/CHEVROLET: FLUID LEAK AT STEERING GEAR INPUT SHAFT. ALL C SERIES MODELS. WHEN REPAIRING A POWER STEERING FLUID LEAK AT THE STEERING GEAR INPUT SHAFT STUB SEAL BEWARE THAT THE PRESSURE SEAL IS NOT AVAILABLE FROM GM SPO PARTS. *PE UPDATED 3/11/11. *PE
