2008 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 KFACTORY OEM SERVICE PROCEDURE

Electrical Component Locator: Switches

SWITCHES LOCATION

Component Location
A/C High Pressure Switch Connector (4.3L) On rear portion of A/C compressor. See Figure.
A/C High Pressure Switch Connector (4.8L, 5.3L & 6.0L) On rear portion of A/C compressor. See Figure.
A/C High Pressure Switch (6.6L) On rear of A/C compressor. See Figure.
A/C Low Pressure Switch On side of accumulator. See Figure.
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L60-E/4L65-E/4L70-E) Internal to transmission. See Figure.
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L80-E/4L85-E) Internal to transmission. See Figure.
Brake Booster Fluid Flow Alarm Switch In power steering pump outlet hose.
Brake Booster Fluid Pressure Alarm Switch In power steering pump inlet hose.
Brake Fluid Level Switch Connector (Heavy Duty) (8) At left rear of engine compartment. See Figure.
Brake Fluid Level Switch Connector (2) On brake master cylinder reservoir. See Figure.
Brake Pressure Differential Switch Connector (Light Duty) (5) On brake valve, near front of EBCM. See Figure.
Coolant Level Switch Bottom of surge tank. See Figure.
Door Ajar Switch Connector - LR (18) At base of left "B" pillar. See Figure.
Door Ajar Switch - RR (Passenger/Cargo) (6) At right "B" pillar. See Figure.
Door Jam Switch - LR Side At left "B" pillar. See Figure.
Door Jam Switch - RR Side (Hinged) At right "B" pillar. See Figure.
Door Jam Switch - RR Side (Sliding) At right "B" pillar. See Figure.
Door Latch Assembly - Cargo (3) In right rear cargo door. See Figure.
Door Latch Assembly - Driver At rear of driver door. See Figure.
Door Latch Assembly - Passenger At rear of front passenger door. See Figure.
Engine Coolant Level Switch (6.6L) Right front of engine compartment, attached to bottom of coolant surge tank.
Engine Oil Level Switch On left side of oil pan. See Figure.
Engine Oil Level Switch Connector (4.8L, 5.3L & 6.0L) On right side of oil pan. See Figure.
Horn Switch In steering wheel. See Figure.
Ignition Key Alarm Switch Inside top of steering column. See Figure.
Park Brake Switch Connector (1) Under left side of dash. See Figure.
Park/Neutral Position (PNP) Switch (4.3L & 5.3L) On left side of transmission. See Figure.
PNP Switch (4L60-E/4L65-E/4L70-E) On left side of transmission. See Figure.
Power Brake (PB) Booster Fluid Pressure Alarm Switch Connector (1) Near power brake booster, in booster inlet hose. See Figure.
Seat Belt Switch - LF (1) In left front seat belt latch. See Figure.
Stop Lamp Switch Connector (3) Behind left side of dash, above brake pedal. See Figure.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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