Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2306 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P2600-P2603CIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Verification
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Verification
WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTCs P0480, P0481, P0691, P0692, P0693, and P0694 are not set.
- If a DTC is set, refer to DTC P0480, P0481, P0691, P0692, P0693, or P0694 (w/LLT) or DTC P0480, P0481, P0691, P0692, P0693, or P0694 (w/LLT and Dual Fan) for further diagnosis.
- Ignition ON, verify that the cooling fan or fans operate in all speeds.
- If the cooling fan or fans do not operate in all speeds, refer to Cooling Fan Inoperative (V6) or Cooling Fan Inoperative (with V8) for further diagnosis.
- Ignition ON, command the KR31 auxiliary coolant pump relay ON and OFF with the scan tool. An audible click should be heard when changing between the commanded states.
- Start the engine, observe the DTC information with a scan tool. DTCs P2600, P2602, or P2603 should not set.
- Ignition ON, engine off observe the DTC information with a scan tool. DTC P2601 should not set.
- If DTC P2601 is set, refer to the following procedures for further diagnosis:
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.