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2015 GMC Sierra 5.3 l loss of power

Ward D
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Ward D New Member

Ward D

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Son was using truck yesterday in inclimate weather , on trip home he said the service messages for trailer brakes , ABS, service 4x4 , and stabilitrak came on , vehicle then would not let him  get over 30 /hr. Today will not fire up or dash or radio will not fire up and won't start.  Put a booster on got the dash lights on , with all the messages there , radio fired up but will not even crank.  Step son brought out his little e diagnostic OBD tye reader that you use with a phone app and it will not connect. Any ideas ??

rav3 Senior Enthusiast

rav3

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2015 right? Miles?

Sounds like a bad ground(s)

First one I'd check is the dask ground on drivers side. Several videos on diy for ground fix.

Edited by rav3
DCazares Enthusiast

DCazares

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Check grounds like Rav3 mentioned and disconnect the battery for 10 min. See if anything changes.

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