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Powertrain/Mechanical
3500
G33503
3500
G33803
4500
G33803
Engine Vortec 4.8L Vortec 6.0L Vortec 6.0L
Optional engine Vortec 6.0L /Duramax 6.6L diesel Duramax 6.6L diesel Duramax 6.6L diesel /LPG
Base transmission HD 6-spd. auto. (MYD) HD 6-spd. auto. (MYD) HD 6-spd. auto. (MYD)
Horsepower @ rpm 280 @ 5,200 324 @ 4,700 324 @ 4,700
Torque ft.-lbs. @ rpm 295 @ 4,600 373 @ 4,400 373 @ 4,400
Standard axle ratio 3.42 3.73 4.1
Available axle ratio 3.42/3.73/3.54 3.73 4.1/3.73
Fuel system SFI SFI SFI
Battery HD 600 CCA HD 600 CCA HD 600 CCA
Alternator 145-amp 145-amp 145-amp
50-state emissions 1 FE9/YF5/NE1 FE9/YF5/NE1 FE9/YF5/NE1
Frame, yield strength (psi) 33,000 33,000 33,000
GVWR standard (lbs.) 2 9,900 12,300 14,200
GVWR options (lbs.) 2 10,100 3 /12,300 — —
GAWR (lbs.) front spring/axle 1 4,100–4,600 4,300–4,600 4,600
GAWR (lbs.) rear axle 1 6,084 –8,600 8,600 9,600
Curb weight (lbs.) 1 4,496–5,657 4,967–5,566 5,022–6,043
Payload options (lbs.) 1,4 4,557–7,307 6,714–7,310 8,135–9,156
Fuel tank capacity (gal.) 5 33 33 33/35 LPG
Wheels SRW/DRW DRW DRW
SCHOOL BUS CHASSIS PACKAGE
(B3D)
· Brake warning indicator (UJ1)
· Outside mirror delete (D28)
· Driver-only high-back bucket seating arrangement (ZX1)
or temporary driver-only upfitter option seating (ZP1)
· HVAC system auxiliary rear heat provisions (ENC)
· Inside rearview manual day/night mirror (D31)
· Dual-note horn (U05)
· Stop/turn signal circuits (V4D)
· Standard StabiliTrak on SRW 9,900 and 10,100 GVWR
chassis
4500 Cutaway models feature an improved body structure
to meet heavy-duty commercial duty cycles, with a 10%
increase in metal gauge thickness and added spot welds
and structural adhesive on select components.
Exterior Dimensions
Wheelbase (in.) 139 159 159
Overall length (in.) 246.7 266.7 266.7
Overall height (in.) 82.9 82.9 82.9
Body width (in.) 79.1 79.1 79.1
Cab to axle (in.) 80 100 100
Cab to end of frame (in.) 148.5 168.5 168.5
Ground clearance front/rear (in.) 7.6/6.8 7.6/7.0 7.6/7.0
Turning diameter (ft.) 43.4 54.5 54.5
1
See Order Guide for complete details.
2
Gross Vehicle Weight Rating (GVWR). When properly equipped; includes vehicle, passengers, cargo and equipment.
3
Available in 2013.
4
Maximum payload capacity includes weight of driver, passengers, optional equipment, upfitter installed body and equipment and cargo. Cargo and load capacity is limited by gross front and rear
axle weight ratings and GVWR.
5
Fuel capacity is approximate.
©2013 General Motors. All rights reserved. 01517_HC091-4/2013
An important note about alterations and warranties: Installations or alterations to
the original equipment vehicle (or chassis) as distributed by General Motors are
not covered by the General Motors New Vehicle Limited Warranty. The special
body company, assembler, equipment installer or upfitter is solely responsible
for warranties on the body or equipment and any alterations (or any effect of the
alterations) to any of the parts, components, systems or assemblies installed by
GM. General Motors is not responsible for the safety or quality of design features,
materials, or workmanship of any alterations by such suppliers.