2019 GMC Sierra 1500 Limited equipped with 5.3L V8 Gas OHV, 5.3L V8 Flex OHV
1
Upper
SEE TSB 21-NA-199 FOR THERMAL BYPASS VALVE. INSTALL PER GM POLICIES AND PROCEDURES. FAILURE TO FOLLOW TSB MAY RESULT IN REJECTED WARRANTY CLAIM.
2019 GMC Sierra 1500 Limited equipped with 5.3L V8 Gas OHV, 5.3L V8 Flex OHV
Upper
SEE TSB 21-NA-199 FOR THERMAL BYPASS VALVE. INSTALL PER GM POLICIES AND PROCEDURES. FAILURE TO FOLLOW TSB MAY RESULT IN REJECTED WARRANTY CLAIM.