GMC Workshop Service and Repair Manuals

Crankshaft: Specifications

Main Journal Diameter:

Blue
#1 ......................................................................................................................................................................  74.917-74.925 mm (2.9517-2.9520 inch)
#2 ......................................................................................................................................................................  74.917-74.925 mm (2.9517-2.9520 inch)
#3 ......................................................................................................................................................................  74.917-74.925 mm (2.9517-2.9520 inch)
#4 ......................................................................................................................................................................  74.917-74.925 mm (2.9517-2.9520 inch)
#5 ......................................................................................................................................................................  74.912-74.920 mm (2.9515-2.9518 inch)

Orange or Red
#1 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#2 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#3 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#4 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#5 ......................................................................................................................................................................  74.920-74.928 mm (2.9518-2.9522 inch)

White
#1 ......................................................................................................................................................................  74.933-74.942 mm (2.9524-2.9527 inch)
#2 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#3 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#4 ......................................................................................................................................................................  74.925-74.933 mm (2.9520-2.9524 inch)
#5 ......................................................................................................................................................................  74.928-74.936 mm (2.9522-2.9525 inch)

Taper (Maximum) .................................................................................................................................................  0.005-0.083 mm (0.0018-0.0033 inch)
Out-of-Round (Maximum) ........................................................................................................................................  0.005-0.083 mm (0.008-0.033 inch)
Crankshaft End Play ....................................................................................................................................................  0.10-0.25 mm (0.0039-0.010 inch)

Connecting Rod Journal

Green .....................................................................................................................................................................  60.913-60.962 mm (2.399-2.400 inch)
Yellow ...................................................................................................................................................................  60.962-60.939 mm (2.400-2.401 inch)
Connecting Rod Side Clearance ................................................................................................................................  0.017-0.0305 mm (0.002-0.012 in.)