| Table 1: | Engine Specifications | 
The following approximate capacities are given in English and metric conversions. See Recommended Fluids and Lubricants for more information.
Application  | Capacities  | |
|---|---|---|
English  | Metric  | |
Air Conditioning Refrigerant R134a  | 1.6 lbs  | 0.7 kg  | 
Cooling System  | ||
  | 14.8 qt  | 14.0 L  | 
  | 16.5 qt  | 15.6 L  | 
  | 15.1 qt  | 14.3 L  | 
  | 16.6 qt  | 15.7 L  | 
  | 15.2 qt  | 14.4 L  | 
  | 16.8 qt  | 15.9 L  | 
  | 15.5 qt  | 14.7 L  | 
  | 17.0 qt  | 16.1 L  | 
  | 15.2 qt  | 14.4 L  | 
  | 16.8 qt  | 15.9 L  | 
  | 16.2 qt  | 15.3 L  | 
  | 16.7 qt  | 15.8 L  | 
  | 16.7 qt  | 15.8 L  | 
  | 16.7 qt  | 15.8 L  | 
  | 25.0 qt  | 23.7 L  | 
  | --  | --  | 
  | 26.9 qt  | 25.5 L  | 
  | --  | --  | 
  | 27.1 qt  | 25.6 L  | 
  | --  | --  | 
* Engine Fan Driven cooling system ** Electric Cooling Fan system  | ||
Engine Oil with Filter  | ||
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
Fuel Tank  | ||
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
Wheel Nut Torque  | 140 ft lb  | 190 N·m  | 
After refill, the level must be rechecked. Add enough engine coolant so that the fluid is within the proper operating range.  | ||
Engine  | VIN Code  | Transmission  | Spark Plug Gap  | 
|---|---|---|---|
VORTEC 4300 V6  | W  | Automatic Manual  | 0.060 inches (1.52 mm)  | 
VORTEC 5300 V8  | Z  | Automatic  | 0.040 inches (1.01 mm)  | 
VORTEC 4800 V8  | V  | Automatic Manual  | 0.040 inches (1.01 mm)  | 
VORTEC 5300 V8  | T  | Automatic  | 0.040 inches (1.01 mm)  | 
VORTEC 6000 V8  | U  | Automatic Manual  | 0.040 inches (1.01 mm)  | 
VORTEC 6000 V8  | N  | Automatic Manual  | 0.040 inches (1.01 mm)  | 
VORTEC 8100 V8  | G  | Automatic Manual  | 0.060 inches (1.52 mm)  | 
| Table 1: | Auxiliary Power Outlet (APO) Specifications | 
Application  | Capacities  | |
|---|---|---|
English  | Metric  | |
Hybrid Cooling System  | 2.1 quarts  | 2.0 L  | 
After refill, the level must be rechecked.  | ||
Maximum Output Power  | 2.4 kw  | 
Output Voltage  | 120 VAC +5% -8% measured at the outlets  | 
Current Output (Maximum Continuous)  | 20 Amps  | 
Output Frequency  | 60 Hz ± 0.25 Hz  | 
Total Harmonic Distortion (THD)  | <=10%  | 
Overload Protection Level  | 21 A(rms) current limit for 5 seconds  | 
Ground Fault Detection Level  | >=6ma  | 
| Table 1: | Wheel Nut Torque | 
| Table 2: | Tire Pressure - EMP Only * | 
| Table 3: | Tire Pressure and Slope | 
| Table 4: | Tire Pressure Alerts and Warnings | 
Model  | Description  | Torque  | 
|---|---|---|
C/K 2500  | 8 bolts (14 mm)  | 140 lb ft (190 N·m)  | 
Terrain  | Deflection  | Maximum Speed  | Load  | Minimum Inflation  | 
|---|---|---|---|---|
Highway ** Front Axle  | --  | 93 mph (149 km/h)  | 2400 lbs (1089 kg)  | 45 PSI (3.10 Bar)  | 
Highway ** Rear Axle  | --  | 93 mph (149 km/h)  | 3042 lbs (1390 kg)  | 65 PSI (4.48 Bar)  | 
Highway ***  | 18%  | 93 mph (149 km/h)  | 2300 lbs (1043 kg)  | 40 PSI (2.76 Bar)  | 
Cross Country ***  | 25%  | 30 mph (48 km/h)  | 2300 lbs (1043 kg)  | 23 PSI (1.59 Bar)  | 
Mud, Sand, Snow ***  | 30%  | 10 mph (16 km/h)  | 2300 lbs (1043 kg)  | 18 PSI (1.24 Bar)  | 
* Option Package EMP (Enhanced Mobility Package) vehicles only. Non-EMP vehicles refer to the Tire and Loading Information label attached to the vehicles center pillar (B-pillar), below the driver’s door lock post (striker).
** Inflation pressure needed to obtain the Gross Vehicle Weight Rating (GVWR).
*** All Axles
Terrain  | Cold Inflation Pressure  | Slope  | 
|---|---|---|
Highway * Front Axle  | 45 PSI (3.10 Bar)  | 55  | 
Highway * Rear Axle  | 65 PSI (4.48 Bar)  | 75  | 
Highway **  | 40 PSI (2.76 Bar)  | 51  | 
Cross Country **  | 23 PSI (1.60 Bar)  | 34  | 
Mud, Sand, Snow **  | 18 PSI (1.24 Bar)  | 29  | 
Terrain  | Deviation Pressure Alert ***  | Low Pressure Warning  | 
|---|---|---|
Highway * Front Axle  | ±5 PSI (0.34 Bar)  | 33 PSI (2.28 Bar)  | 
Highway * Rear Axle  | ±5 PSI (0.34 Bar)  | 40 PSI (2.76 Bar)  | 
Highway **  | ±5 PSI (0.34 Bar)  | 30 PSI (2.07 Bar)  | 
Cross Country **  | ±5 PSI (0.34 Bar)  | 17 PSI (1.17 Bar)  | 
Mud, Sand, Snow **  | ±5 PSI (0.34 Bar)  | 13 PSI (0.90 Bar)  | 
* Factory Tire Pressure Setting
** All Axles
*** From Cold Pressure Tire Setting