4500 HD Series (Included and only available with (C7Y) 14,001 lbs. GVWR, (C5B) 15,000 lbs. GVWR, (C7P) 16,000 lbs. GVWR or (C7R) 16,500 lbs. GVWR.)
Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible 350 hp @ 2700 rpm, 700 lb-ft torque @ 1600 rpm
Highway Service Transmission, Automatic close-ratio 6 SPD with double overdrive, Allison, A1700HS ratios: 3.10 1ST, 1.80 2ND, 1.40 3RD, 1.00 4TH, 0.70 5TH, 0.61 6TH Highway Series, 19.5K GVW & 26K GCW Max., requires PTX and park pawl. Available with GVWs less than or equal to 19.5K (Requires (C7Y) 14,001 lbs. GVWR, (C5B) 15,000 lbs. GVWR, (C7P) 16,000 lbs. GVWR, (C7R) 16,500 lbs. GVWR, (GZX) 17,500 lbs. GVWR, (GZJ) 18,000 lbs. GVWR or (GZG) 19,500 lbs. GVWR. Requires (R6G) 26,000 lbs. GCWR (11,793 kg).)
Rear axle, 4.10 ratio Max road speed: 79 MPH
GVWR, 16,500 lbs. (7484 kg) (Silverado 4500 HD models with (FQT) requires one of the following combinations: (1) (FTC) and (FTW) and (GL4) and (GR3). Requires (G68). (2) (FTC) and (FTW) and (HD2) and (GR4). Requires (G68). (3) (FTC) and (FTW) and (HD1) or (J27) and (GR4). Requires (G68). (4) (FTA) and (FK6) and (FN1) or (GL4) and (GR3). Requires (PCJ). (5) (FTA) and (FK6) and (HD1) or (J27) and one of the following rear suspensions: (GR4) or (FU7). Requires (PCJ). Silverado 4500 HD models without (FQT) requires one of the following combinations: (1) (FTC) and (FTW) and (GL4) and (GR3) and (G68). (2) (FTC) and (FTW) and (HD2) and (GR4) and (G68). (3) (FTC) and (FTW) and (HD1) or (J27) and (GR4) and (G68). (4) (FTA) and (FK6) and (FN1) or (GL4) and (GR3) or (G40). (5) (FTA) and (FK6) and (HD1) or (J27) and one of the following rear suspensions: (GR4), (FU7), (GP1) or (GP8).)
Wheelbase, 141" (358.1 cm), 60" CA (Requires (F0C) 49" axle to end of frame, (F0D) 63" axle to end of frame or (F0K) 91" axle to end of frame and (NPR) exhaust. Requires (PCJ) Vocational Specific Heavy Suspension Package, when ordering (FTA) 7,000 lbs. Front axle/(FK6) 7,000 lbs. Front suspension or (FTL) 8,000 lbs. Front axle/(FSN) 8,000 lbs. Front suspension and/or (FU7) 15,500 lbs. rear suspension. Not available with rear air suspensions.)
Front axle, 6,250 lb. (2,835 kg), Dana Spicer D800-N, "I"-beam, non-driving (Requires (FTW) 6,250 lb. front suspension. Includes (G68) rear shock absorbers. Not available with rear air suspensions.)
Front suspension, 6,250 lbs. (2,835 kg) multi-leaf, includes shock absorbers (Not available with rear air suspensions.)
Rear axle, 11,000 lbs. (4,999 kg) Dana Spicer S14-110, single reduction
Rear suspension, 11,000 (4,990 kg) multi-leaf, vari-rate (Not available with air suspension.)
Emissions, USA 50 State certified
Axle, limited slip, Dana Spicer Truetrac, torque proportioning limited slip (Not standard when (G80) Heavy-duty locking rear differential is ordered.)
Transmission shift control calibration, fuel sense Performance
Batteries, heavy-duty dual 1100 cold-cranking amps includes battery box mounted to left side under cab
Axle to End of Frame, 49" (Requires wheelbase (ED5) 201", (ED9) 165", (ER2) 189" or (FQT) 141". Not available with (G40), (GP1) or (GP8) rear air suspension.)
Axle lubricant, rear, synthetic oil EmGard FE -75W-90
Shock Absorbers, rear (Included with (FTC) 6,250 lb. front axle.)
Steering, power (Bosch S2 8014 Plus)
Brakes, hydraulic, heavy duty Bosch/Meritor/Wabco system with 4-channel (ABS) (Includes (J69) driveline park brake.)
Fuel tank, rear only, 40 gallon mounted between frame side rails and behind rear axle
Exhaust system, right side exit, behind rear wheel (Requires (FQT) 141" wheelbase.)