Not sure what 16-20 inch lbs means or what to set it on?

Use an Inch pound torque wrench (very cheap to buy), then set it to the conversion of 9.5 ft pounds to inch pounds which is 114 inch pounds.

8.8 ft lbs. use your calculator. 106 divided by 12 Foot/ Pound Torque wrenches are not accurate that low, thats why its inch lbs.

lower intake manifold

step 1 27 inch lbs.

step 2 106 inch lbs.

step 3 134 inch lbs.




upper intake manifold

step 1 44 inch lbs.

step 2 80 inch lbs.

4.3L Engine

1. Remove or disconnect the following:
   
   Negative battery cable Bracket and shield Wires Mounting bolts and shims Starter

To install:

1. Install or connect the following:
   
   Starter Mounting bolts and shim. Torque the bolts to 33 ft lbs. (45 Nm). Wires. Torque battery wire nut to 89 inch lbs. (10 Nm) and ignition nut to 18 inch lbs. (2 Nm). Bracket and shield. Torque the nuts to 53 inch lbs. (6 Nm). Negative battery cable
   
   
   Fig. Exploded view of the starter motor-4.3L engines.
   
   

1. Remove or disconnect the following:
   
   Negative battery cable Bracket and shield Wires Mounting bolts and shims Starter

To install:
Install or connect the following:

Starter Mounting bolts and shim. Torque the bolts to 33 ft lbs. (45 Nm). Wires. Torque battery wire nut to 89 inch lbs. (10 Nm) and ignition nut to 18 inch lbs. (2 Nm). Bracket and shield. Torque the nuts to 53 inch lbs. (6 Nm). Negative battery cable


Fig. Exploded view of the starter motor-4.3L engines.

Hope help with this (remember rated and comment this).

Heads
Step 1 - 24 ft.lbs
Step 2 - 45 ft.lbs
Step 3 - 65 ft.lbs
Apply sealant to head bolt threads.

Lower intake
Step 1 - 27 inch lbs
Step 2 - 106 inch lbs
Step 3 - 133 inch lbs

Upper intake
Step 1 - 44 inch lbs
Step 2 - 88 inch lbs

Torque Specifications TORQUE SPECIFICATIONS All readings in ft. lbs.

Year Engine Displacement Liters (VIN) Cylinder Head Bolts Main Bearing Bolts Rod Brearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Intake Exhaust Spark Plugs Oil Pan Drain Plug 2001 2.2 (4) ① 70 38 77 ② 55 ③ 10 13 18 2.4 (T) ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ 13 18 NA: Not Available ① Step 1: Long bolts: 46 ft. lbs. Step 2: Short bolts: 43 ft. lbs. Step 3: Long bolts an additional 90 degree turn Step 4: Short bolts an additional 90 degree turn ② Center bolt spec shown; Pulley-to-hub bolts: 37 ft. lbs. ③ Bolts: 17 ft. lbs. Nuts: 17 ft. lbs. Studs: 9 ft. lbs. ④ Step 1: bolts 1-8; 40 ft. lbs. Step 2: bolts 9-10: 30 ft. lbs. Step 3: An additional 90 degree turn ⑤ 15 ft. lbs. plus 90 degrees ⑥ 18 ft. lbs. plus 80 degrees ⑦ 129 ft. lbs. plus 90 degrees ⑧ 15 ft. lbs. plus 45 degrees ⑨ Nuts: 18 ft. lbs. Studs: 97 inch lbs. ⑩ Nuts: 31 ft. lbs. Studs: 97 inch lbs. ⑪ Step 1: Long bolts: 2 ft. lbs. Step 2: plus an additional 155 degrees ⑫ 15 ft. lbs. plus 70 degrees ⑬ 18 ft. lbs. plus 100 degrees ⑭ 74 ft. lbs. plus 125 degrees ⑮ 39 ft. lbs. plus 25 degrees ⑯ Bolts: 89 inch lbs. Nuts: 89 inch lbs. Studs: 53 inch lbs. ⑰ Bolts: 89 inch lbs. Studs: 12 ft. lbs.

① Step 1: 22 ft. lbs. Step 2: 59 ft. lbs. Step 3: Loosen completely then retorque to 22 ft. lbs. Step 4: 18-25 ft. lbs. Step 5: Plus 86-91 degrees ② 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs. ③ The cylinder heads and the lower intake manifold are installed together Step 1: Tighten the cylinder head bolts to 22 ft. lbs. Step 2: Tighten the cylinder head bolts to 43 ft. lbs. Step 3: Loosen the cylinder head bolts completely Step 4: Tighten the cylinder head bolts to 84 inch lbs. Step 5: Tighten the intake manifold fasteners to 35 inch lbs. Step 6: Tighten the intake manifold fasteners to 13 ft. lbs. Step 7: Tighten the intake manifold fasteners to 12-14 ft. lbs. Step 8: Loosen all intake manifold fasteners completely Step 9: Tighten the cylinder head bolts to 22 ft. lbs. Step 10: Tighten the cylinder head bolts 60-65 degrees Step 11: Tighten the cylinder head sub-bolts to 80-105 inch lbs. Step 12: Tighten the intake manifold fasteners to 35 inch lbs. Step 13: Tighten the intake manifold fasteners to 78 inch lbs. Step 14: Tighten the intake manifold fasteners to 70-84 inch lbs. ④ 10-12 ft. lbs. +60-65 degrees ⑤ Step 1: 72 ft. lbs. Step 2: loosen completely to 0 ft. lbs. Step 3: 29 ft. lbs. Step 4: Plus 75 degrees clockwise Step 5: Plus 75 degrees clockwise ⑥ Step 1: bolts 11-22 19 ft. lbs. Step 2: bolts 1-10 29 ft. lbs. Step 3: bolts 1-10 Plus 60-65 degrees ⑦ Step 1: 20 ft. lbs. Step 2: loosen to 0 ft. lbs. Step 3: 14 ft. lbs. Step 4: Plus 85-95 degrees ⑧ Step 1: 31 ft. lbs. Step 2: Plus 60 degrees ⑨ 83 inch lbs. ⑩ Stud bolt: 11 ft. lbs. Nuts: 31 ft. lbs. ⑪ Step 1: 72 ft. lbs. Step 2: loosen completely to 0 ft. lbs. Step 3: 29 ft. lbs. Step 4: Plus 90 degrees clockwise Step 5: Plus 90 degrees clockwise ⑫ Bolts: 17-24 (M8) 16 ft. lbs. Install rear main seal Bolts: 1-16 (M10) 26 ft. lbs. Bolts: 1-16 (M10) Plus 90 degrees clockwise ⑬ Step 1: 33 ft. lbs. Step 2: Plus 84-90 degrees clockwise ⑭ Intake manifold collector: Bolts and nuts: 8 ft. lbs. Stud bolts: 61 inch lbs. ⑮ Intake manifold: Bolts and nuts: 5 ft. lbs. and than to 21 ft. lbs. Studs: 8 ft. lbs.

Here's a link to a conversion calculator,www.unitconversion.org/energy/inch-pounds-to-foot-pounds-conversion.html

divid by 12
1 ft lb = 12 in lbs