GM Service Manual Online
For 1990-2009 cars only

CRACKING OF EXHAUST MANIFOLD NEW MANIFOLD RELEASED

A NEW EXHAUST MANIFOLD HAS BEEN RELEASED TO REDUCE CRACKING WHEN SUBJECTED TO HIGH TEMPERATURES. THESE MANIFOLDS ARE ALSO INTERCHANGEABLE WITH PAST MODEL YEARS AND CAN BE IDENTIFIED BY THE CASTING NUMBERS ON THE MANIFOLDS (14045183-L.H.) AND (14045184-R.H.). THIS CHANGE WAS MADE ON PRODUCTION UNITS BUILT AFTER NOVEMBER 1, 1981. PARTS INFORMATION PART NUMBER ATTACHING HARDWARE TORQUE NEW EXHAUST MANIFOLD (BOTH MANIFOLDS) 14045181 - L.H. 15 - 3909821 - BOLT 20 LB. FT.(27 NM) 14045182 - R.H. 1 - 473361 - STUD 20 LB. FT.(27 NM)

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.