Guess I'm making a habit of reviving threads.
Thanks to OP!!
Adding 5.3 Liter Vortec head bolt torque sequence
For 2003-04 vehicles, tighten the cylinder head bolts in sequence as follows:
- Tighten the M11 bolts to 22 ft. lbs. (30 Nm).
- Tighten the M11 an additional 90 degrees.
- Tighten M11 bolts 1-8, an additional 90 degrees and M11 bolts 9 and 10 an additional 50 degrees.
- Tighten the M8 bolts (11-15) to 22 ft. lbs. (30 Nm). Tighten all the bolts beginning with the center bolt and working outward, alternating sides
For 2005 vehicles, tighten the cylinder head bolts in sequence as follows:
- Tighten the M11 bolts to 22 ft. lbs. (30 Nm).
- Tighten the M11 an additional 90 degrees.
- Tighten M11 bolts, an additional 70 degrees.
- Tighten the M8 bolts to 22 ft. lbs. (30 Nm). Tighten all the bolts beginning with the center bolt and working outward, alternating sides
*Info courtesy of AutoZone
