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.
2012 Chevrolet Express 2500 V8-4.8LFACTORY OEM SERVICE PROCEDURE
HVAC Control Module- Auxiliary (C69 with Rear Auxiliary Controls)
Passenger Compartment/Roof Component Views
Headliner
1 - HVAC Control Assembly- Front Auxiliary (C69)
2 - Dome/Reading Lamp- Front
3 - HVAC Control Assembly- Rear Auxiliary (C69 with Rear Auxiliary Controls)
4 - Dome/Reading Lamp- Middle (Passenger)
5 - Dome/Reading Lamp- Rear (Passenger)/Dome Lamp (Cargo)
6 - Electronic Compass Module (U80)
7 - Sunshade- Right (DH6)
8 - HVAC Control Module- Auxiliary (C69 with Rear Auxiliary Controls)
9 - Sunshade- Left (DH6 with YF7)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.