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# 050604073.
Affected Component: ENGINE AND ENGINE COOLING:ENGINE
CHECK ENGINE LIGHT MALFUNCTION INDICATOR LAMP ILLUMINATED, USUALLY WITHOUT DRIVEABILITY SYMPTOMS, DIAGNOSTIC TROUBLE CODES P0128, P0326, PO420, P0717, P2431 SET ON L61 ENGINE (FOLLOW SI, AND IF NECESSARY, REPROGRAM ENGINE CONTROL MODULE (ECM) WITH NEW SERVICE CALIBRATION). *AK
