Service manual

22956 Highway 61 Morley, MO 63767 PH: 573-262-3545; FAX: [phone] www.vikingcives.com
New LD Manual 11 Revision 08
2005 to 2008 GMC INSTALLATION INSTRUCTIONS – 4500 AND 5500
1. Remove front bumper saving the fasteners for reinstallation.
2. Remove tow hooks and fasteners.
3. Install items 4 and 5 to the bottom of frame rails using the 8 metric bolts provided. Don’t tighten all the way right now.
4. Install items 6 and 7 over the top of frame rails making sure item 8 is between frame and two outside holes. Reinstall 4 OEM
tow hook fasteners and tow hooks thru item 6, 7, and 8.
5. Install left and right attaching brackets to items 4, 5, 6, and 7 with fasteners provided. Don’t tighten nuts and bolts at this
time.
6. Position receiver plate item 3 to the receiver pads of the left and right attaching brackets.
7. Verify proper frame contact and alignment of all components at this time. Adequately tighten the following fasteners in this
sequence:
 (4) Original tow hooks and tow hook bolts.
 (8) ½” x 1 ½” in upper sections of left and right attaching brackets.
 (12) 5/8” x 2” bolts connecting receiver to attaching brackets.
8. Install items 9 and 11 to existing holes rearward on frame with (4) OEM fasteners already in frame.
9. Install stiffener bar (item 12) to items 9 and 11 using (2) 5/8” x 1 ¾” bolt and (2) 5/8” top lock nuts. Next install item 10 to
stiffener bars (item 12) using (2) 5/8” x 1 ¾” bolts and (2) 5/8” top lock nuts. Position item 10 off the back of attaching
brackets (item 1 and 2) and weld complete.
10. Install lift frame release pins, springs, and cotter pins into item 3.
11. Re-install and properly adjust bumper utilizing the original fasteners.