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.
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HOMESERVICE MANUALSCHEVROLET2012EXPRESS 3500 V8-4.8LREPAIR AND DIAGNOSISMAINTENANCETECHNICAL SERVICE BULLETINS
2012 Chevrolet Express 3500 V8-4.8L
Maintenance: Technical Service Bulletins
2012 Chevrolet Express 3500 V8-4.8LSECTION Technical Service Bulletins
- Customer Interest
- Steering - Rubbing/Groaning Noise On Low Speed Turns
- Tires/Wheels - Rattle Noise from Wheel Or Hub Cap
- Steering - Rattle Noise Coming From Front Of Vehicle
- Tires/Wheels - Tire Slowly Goes Flat/Warning Light ON
- Power Steering - Fluid Leaks Due to Extreme Low Temps
- Steering - Power Steering Leaking Fluid
- Tires/Wheels - Vibration Shortly After Tires Are Mounted on Rim
- By Symptom
- Abnormal/Uneven wear
- Customer Interest
- Steering - Rubbing/Groaning Noise On Low Speed Turns
- Tires/Wheels - Rattle Noise from Wheel Or Hub Cap
- Steering - Rattle Noise Coming From Front Of Vehicle
- Tires/Wheels - Tire Slowly Goes Flat/Warning Light ON
- Power Steering - Fluid Leaks Due to Extreme Low Temps
- Steering - Power Steering Leaking Fluid
- Tires/Wheels - Vibration Shortly After Tires Are Mounted on Rim
- Leaks
- Loose
- Noise
- Vibration
- All Technical Service Bulletins
- Engine - GM dexos 1(R) and dexos 2(R) Oil Specifications/Info.
- Vehicle - Engine And Sub-Systems Flushing Recommendations
- Wheels/Tires - Refinishing Aluminum Wheels
- Steering - Rubbing/Groaning Noise On Low Speed Turns
- Tires/Wheels - Rattle Noise from Wheel Or Hub Cap
- A/T - Shift Stabilization/Tow Haul Mode Features
- Steering - Rattle Noise Coming From Front Of Vehicle
- Tires/Wheels - Tire Slowly Goes Flat/Warning Light ON
- Power Steering - Fluid Leaks Due to Extreme Low Temps
- Steering - Power Steering Leaking Fluid
- Tires/Wheels - Vibration Shortly After Tires Are Mounted on Rim
- Tires - Slight/Mild Edge Feathering Information
- Tires/Wheels - OE Tire Shake/Vibration Information
- Tires - Information On Proper Tire Pressure
- Wheels/Tires - Use Of Nitrogen Gas In Tires
- Wheels/Tires - Proper Wheel Installation/Wheel Torque Technique
- Tires/Wheels - Information on Tire Radial Force Variation (RFV)
- Engine - GM Dexos 1(R) And 2(R) Oil Specifications
- Wheels - Chromed Aluminum Wheel Staining/Pitting/Corrosion
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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.