Chevrolet & GMC

All models with 32 splines use an alignment key on spline, and can mate in correct position only. On "C" and "P" models with 2-piece shafts, proper phasing is accomplished with an alignment key on spline and can mate in correct position only.
On "G", "K", and "S" models with 2-piece shafts, rotate transmission yoke until trunnion is in vertical position. Install front drive shaft with "U" joint trunnion in horizontal position. Install bearing support to crossmember. Align rear drive shaft with "U" joint trunnion to horizontal position and install shaft.

Fig 1: View Showing Typical Slip Joint Alignment Arrows

NOTE: Align arrows to sides of seal retainer.

Fig 2: Drive Shaft Phase Alignment for Chevrolet and GMC Models

NOTE: "G", "K" & "S" 2-Piece Shaft: When aligning, set transmission and rear shaft trunnions vertically, others horizontally.