I have a 2019 Silverado 1500-LD double cab. I've been trying to find a good wiring diagram for the vehicle, but there is nothing in Haynes, or on the web that I found. Dealer is of no help unless I want to buy the complete shop set which includes all mechanicals and engine types.
The mission: 1). Install cab roof lights. Another message gave me basic info, but no specific terminal numbers. 2). I would like to locate the wires and tap the signal off the turn signal switch to a relay, turning on floods on the side of the grill guard. This is to have better illumination in the direction of turns on logging roads. 3). I would also like to put radios in my truck which we use for comms on the highway and sites. I'm looking for a convenient way to tap for the accessory signal for a relay, so when ignition is off, so are all the radios.
It's my impression that there were changes in the 2018 and before, and 2020 and later which do not apply to the 2019. Any help in finding a manual showing accurate drawings, (downloadable or manual purchase), for the 2019 1500-LD would be appreciated.