2004 GMC 2500HD lost electrical.

Asked by Sep 27, 2017 at 08:25 PM about the 2004 GMC Sierra 2500HD 2 Dr SLE 4WD Standard Cab LB HD

Question type: General

i have recently swapped out my factory radio for an aftermarket dual din with
bluetooth . after doing so i have lost a number of things on the truck .  i have
lost my Temp , Fuel , Battery , and oil pressure gauges .  also lost my door
chime buzzer .  lost my reverse lights and my interior dome light .   i have
checked all fuses and found a fuse that was blown for the interior light and
got it working again .   im at a loss regarding the remaining problems . i am
aware that the chime buzzer is operated through the drivers door speaker .   
the speaker does work with the new radio .  is there a relay for the gauges .  
my speedo and tach still work with no issues .   any help would be great   
truck is a 2004 gmc seirra 2500 HD reg cab long box 4x4 6.6L duramax with
5 spd allison tranny .

2 Answers


You need a wiring diagram. check out crutchfield.com, they can get you the right info and plugs for a proper install. Oh, and disconnect your negative battery cable before performing any electrical work on your vehicles so you don't have fuses blowing.

Hi Tom . Thanks for the reply . I wired the radio accordingly to the wire diagram for the vehicle . The neg battery cable was disconnected at time of install

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