How do you replace a flasher unit on Chevy Express cargo van or were is it?

The location of the flasher unit in a Chevy Express cargo van varies depending on the year and model. There isn't a single, universal location. It's *not* usually under the hood, like in older vehicles. It's more likely integrated into a larger module or under the dashboard.

To find it, you'll need to:

1. Consult your owner's manual: This is the most reliable source. The manual should have a diagram showing the fuse box and relay locations. Look for sections related to fuses, relays, or electrical diagrams. The flasher relay might be specifically called out or listed within a larger module.

2. Check the fuse box under the dashboard: Many modern vehicles integrate the flasher relay into the fuse box itself. Often, the fuse box will have a cover with a diagram showing what each fuse and relay controls. Look for a relay that's labeled "turn signal," "hazard," or something similar.

3. Check the fuse box under the hood (less likely): While less common in newer vehicles, some might still have the flasher unit in the under-hood fuse box.

4. Online forums and repair manuals: Search online forums specific to your year and model of Chevy Express van (e.g., "2010 Chevy Express van flasher relay location"). Repair manuals (like those from Haynes or Chilton) often have detailed diagrams showing the location of all electrical components.

Once you've located the flasher unit:

* Replacement: Replacing the flasher unit is relatively simple. Usually, it's a small square or rectangular relay that plugs into a socket. Simply unplug the old flasher unit and plug in the new one, ensuring it's oriented correctly. Make sure to get a replacement flasher unit that's compatible with your van's electrical system. The auto parts store can assist with this.

Important Considerations:

* Safety: Disconnect the negative battery terminal before working on any electrical components to avoid short circuits or injury.

* Correct Replacement: Buy a flasher unit that is specifically designed for your vehicle's make, model, and year. The auto parts store will be able to help you identify the correct part.

* If you are not comfortable working on electrical systems, take your van to a qualified mechanic.

Without the specific year and model of your Chevy Express van, I cannot give more precise instructions. Providing this information will allow for a more accurate and helpful answer.