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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 536 (ANTILOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC C1294TEST DESCRIPTION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Test Description

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 2:  Test for the current state of the stop lamp switch parameter.
DTC C1294

Step Action Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference:  ABS Connector End Views  
1 Did you perform the ABS Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - ABS 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Stop lamp Switch parameter in the TCS data list.
Does the scan tool display Released?		 Go to Step 3  Go to Step 4 
3
  1. Press the brake pedal.
  2. With a scan tool, observe the Stop lamp Switch parameter.
Does the Stop Lamp Switch parameter change state?		 Go to Diagnostic Aids Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Inspect the stop lamp switch and adjust and/or calibrate if needed. Refer to Stop Lamp Switch Adjustment in Lighting Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the stop lamp switch connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Stop lamp Switch parameter.
Does the scan tool display Released?		 Go to Step 8  Go to Step 6 
6 Test the stop lamp switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 7 
7 Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the stoplamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
9 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the repair?		 Go to Step 11  -
10 Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement in Lighting Systems.
Did you complete the repair?		 Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
RENDER: 1.0x

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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.