Question about GMC Envoy
If you have multiple problem and there is clicking noise , then the problem is the Headlamp Driver Module relay.
To start ensure that fuses are OK, check fuses #3, #6, and #57 that control the lights.
The Headlamp Driver Module is relay #46. For testing purpose you cna try switching the relay #46, with the fan relay #47. The lights driver relay must be replaced with a relay of the same kind. Do not keep engine on without fan relay.
Posted on Oct 03, 2009
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Posted on Jan 02, 2017
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