Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Upfitter Switch




Upfitter Switch









Removal and Installation

All vehicles

1. Remove the instrument panel center finish panel. For additional information, refer to Instrument Cluster / Carrier &/or Interior Moulding / Trim.

Vehicles with trailer brakes

2. Using a suitable tool (such as a small screwdriver), press the retaining tab at the top and remove the Trailer Brake Control (TBC) module.

Vehicles without trailer brakes

3. Using a suitable tool (such as a small screwdriver), press the 4 retaining tabs and remove the storage bin.

All vehicles

4. Using a suitable tool (such as a small screwdriver), press the 4 retaining tabs and remove the upfitter switch.

5. To install, reverse the removal procedure.