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# PIC-5551-A.
CHEVROLET: SOME MODEL YEAR VEHICLES ARE EXPERIENCING A DROP/SPIKE IN SPEED ON ANY WHEEL SPEED SENSOR AFTER NOISE, RATCHET, GRIND, OR ABS PUMP MOTOR, WAS HEARD, FROM FRONT OF VEHICLE. *PE
