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72
RECOMMENDED BOLTED HOLE POSITIONS FOR OPTIONAL
CMVSS UNDERRIDE INSTALLED ON GPTLR-44 & GPTLR-55
BED
HEIGHT
UNDER-
RIDE
HOLE NO.
“H”
EXPECTED UN-
DERRIDE GROUND
CLEARANCE
(PLATFORM STOWED)
“H1”
EXPECTED UNDERRIDE GROUND CLEAR-
ANCE & MAX SPRING DEFLECTION OF
VEHICLE WITH LOAD
(PLATFORM ON THE GROUND)
55” 1 21.35” 4.16”
54” 2 21.36” 3.37”
53” 3 21.38” 2.70”
52” 4 21.40” 2.17”
51” 5 21.41” 1.75”
50” 6 21.42” 1.44”
49” 7 21.42” 1.24”
TABLE 72-2
RECOMMENDED BOLTED HOLE POSITIONS FOR STANDARD
FMVSS UNDERRIDE INSTALLED ON GPTLR-44 & GPTLR-55
BED
HEIGHT
UNDER-
RIDE
HOLE NO.
“H”
EXPECTED UN-
DERRIDE GROUND
CLEARANCE
(PLATFORM STOWED)
“H1”
EXPECTED UNDERRIDE GROUND CLEAR-
ANCE & MAX SPRING DEFLECTION OF
VEHICLE WITH LOAD
(PLATFORM ON THE GROUND)
55” 1 21.5” 3.6”
54” 2 21.5” 2.9”
53” 2 21.5” 2.3”
52” 3 21.5” 1.8”
51” 3 21.5” 1.3”
50” 4 21.5” 0.9”
49” 4 21.5” 0.6”
48” 4 21.5” 0.3”
47” 5 21.5” 0.1”
44” 6 21.5” 0”
TABLE 72-1
STEP 15 - ADJUST UNDERRIDE - Continued
NOTE: The bed height dimensions, for each underride hole shown below, apply to
an unloaded vehicle.