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.
Upfitter System
The upfitter system contains:
- Upfitter relays
- Upfitter switches (located in lower portion of the instrument panel center finish panel)
The upfitter switches each have an indicator that illuminates when the switch is in the on position. The upfitter switches are used to control relays for switching customer installed accessories on and off. The 4 upfitter switches can enable its corresponding relay only when the ignition is in the RUN or ACC state.
Upfitter relays 1 and 2 can support up to a 25 amp output each, upfitter relay 3 can support up to a 10 amp output and upfitter relay 4 can support up to a 15 amp output.
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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.