Headlights only work when truck not running

What is your question?

As soon as truck Is started, dimmer switch is also stuck on high beams, but no lights except parking lights come on

How long has your 2001 GMC Sierra 2500 HD had this problem?

1 day

Visitor

in Holland MI

Oct 9, 2019

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RepairPal Certified shops can diagnose and repair your 2001 GMC Sierra 2500 HD. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

Headlights only work when truck not running

What is your question?

As soon as truck Is started, dimmer switch is also stuck on high beams, but no lights except parking lights come on

How long has your 2001 GMC Sierra 2500 HD had this problem?

1 day

Visitor

in Holland MI

Oct 9, 2019

1 Reply

Popular Answer

pushrodon Oct 9, 2019

**Hands-on** inspection / evaluation by qualified personnel is going to be required for this concern. Those particular symptoms are so unusual they don’t make any sense - therefore it will be impossible for us to offer any beneficial diagnosis here online. Good luck!

pushrodon Oct 9, 2019

I have fixed a bunch of vehicles over the last 45 + years but I have never came upon this particular situation before .. Turn headlight switch on with engine off and headlights work ok .... Now start the engine and the headlights will not work at all.. I’m out of ammunition on this one!

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Headlights only work when truck not running

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