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# 090903.
Affected Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
NEW PRODUCT FIELD 03048 A VOLUNTARY EMISSION RECALL INVOLVING A CONDITION THAT INCORRECTLY DISABLES THE ONBOARD DIAGNOSTICS MISFIRE MONITOR ABOVE 35 MILES PER HOUR. GM VOICEMAIL LOG. *TT
