Page 102 of GM Goodwrench Engines Catalog by GM Goodwrench

GOODWRENCH SERVICE REPLACEMENT ENGINES Section V Page 101 August 2004 89017323 262 CID New 4.3L 2001 Chevrolet, GMC LM1 (L35) 2001-02 Chevrolet, GMC T1 (L35) 2001-03 Chevrolet, GMC T1 (LG3) M30 2002 Chevrolet, GMC LM1 (LU3) Engine-Specific Content: Light Duty Deep Oil Pan, Harmonic Balancer, Front Cover, and Rocker Covers Replaces: 88894117, 12570474 Replaced By: INSTALLATION INSTRUCTIONS Instruct customer that the first service interval including an oil and filter change should be between 300 and 500 miles. Replacement of oil related parts: If the original engine failed either catastrophically or due to bearing failure, the engine oil cooler MUST BE REPLACED and the oil lines and remote filter adapter MUST BE REMOVED from the vehicle and thoroughly flushed or replaced. Ingestion of fibers and grit from conditioning pads (i.e. Scotch Brite) is the number one cause of 4.3L engine failure. Intake Manifold: For some engine assemblies (see service manual), sealer (part number 12346004) or equivalent MUST BE APPLIED to lower intake manifold bolts when installing the lower intake manifold. Failure to do so will usually result in increased oil consumption by allowing oil from the engine valley to be drawn into the intake manifold plenum. Since the plenum drain holes empty into cylinder #3 and #4, oil fouling will be greater on the spark plugs in these cylinders. Front Covers: 4.3 blocks with ten-bolt front cover provisions accept either ten-bolt metal covers or, after removing dowel pins, accept six-bolt plastic covers. On OBD II equipped engines, reluctor ring must also be transferred. CAUTION: The oil pump in this engine must be primed before starting engine. DAMAGE WILL RESULT IF ENGINE IS STARTED WITHOUT OIL OR IF OIL PUMP IS NOT PRIMED. 89017324 262 CID New 4.3L 2003-04 Chevrolet, GMC S1 (LU3) 2003-04 Chevrolet, GMC CK1 (LU3) 2003-04 Chevrolet, GMC G1,2 (LU3) 2004 Chevrolet, GMC R1 (LU3) 2005 Chevrolet, GMC S1 (LU3) M50, M30 Engine-Specific Content: Oil Pump, Front Cover, and Rocker Covers Replaces: 88984291, 12578698 Replaced By: INSTALLATION INSTRUCTIONS No special installation instructions are necessary. Please refer to the general installation procedure section of this book. 89017325 262 CID New 4.3L 2003-04 Chevrolet, GMC T1 (LU3) 2003-04 Chevrolet, GMC LM1 (LU3) M30 2005 Chevrolet ST1 (LU3) M30, ZR2 Engine-Specific Content: Oil Pump, Front Cover, and Rocker Covers Replaces: 88984292, 12578699 Replaced By: INSTALLATION INSTRUCTIONS No special installation instructions are necessary. Please refer to the general installation procedure section of this book.

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