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 721 (HVAC SYSTEMS - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Diagnostic Code Index

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Diagnostic Code Index

WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC CODE INDEX

DTC	Description
DTC B0159 or B0164	DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance DTC B0164 Passenger Compartment Temperature Sensor Circuit Range/Performance
DTC B0174, B0179, B0510, or B0515	DTC B0174 Output Air Temperature Sensor (Upper Left) Circuit Range/Performance DTC B0179 Output Air Temperature Sensor 2 (Lower Left) Circuit Range/Performance DTC B0510 Output Air Temperature Sensor 3 (Upper Right) Circuit Range/Performance DTC B0515 Output Air Temperature Sensor 4 (Lower Right) Circuit Range/Performance
DTC B0183 or B0188	v
DTC B0229, B0414, B0424, or B3770	DTC B0229 Recirculate Position Feedback Circuit Range/Performance DTC B0414 Temperature Control 1 Feedback Circuit Range/Performance DTC B0424 Temperature Control 2 Feedback Circuit Range/Performance DTC B3770 Air Flow Control 6 Feedback Circuit
DTC B0263, B0268, B0408, or B0418	DTC B0263 Air Flow Control 6 Circuit DTC B0268 Air Flow Control 7 Circuit DTC B0408 Temperature Control 1 Circuit DTC B0418 Temperature Control 2 Circuit
DTC B0989	Output Air Temperature Lower Sensors Correlation
DTC B0990	Output Air Temperature Upper Sensors Correlation
DTC B1375	Device Ignition 3 Circuit
DTC P0530 (LU3, LR4, LM7, LQ4 and L18)	Air Conditioning Refrigerant Pressure Sensor Circuit
DTC P0530 (LB7)	Air Conditioning Refrigerant Pressure Sensor Circuit

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.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.