2019 1500 AT4 Cigarette Lighters

[Maverick0984]

I'm trying to install this: https://boostautoparts.com/products/2019-newer-gm-charging?options=&year=2019&make=GMC&model=Sierra 1500

 

And before I went ahead and made permanent mods to the trip pieces (drill holes) I decided to try charging my phone before I put it back together and it wouldn't work.  Further troubleshooting and neither of my accessory/cigarette lighters function, front or back.  All other USB outlets seem to function just fine.

 

This particular device plugs into the accessory/cigarette lighter wiring hardness in back, underneath the two cup holders.

 

Anyway, tried a meter and couldn't get any voltage at either so went hunting for the fuse(s).  Found this site (https://www.startmycar.com/us/gmc/sierra/info/fusebox/2019/gen-g5) which seems to explain it well and seems to match my manual but for the life of me, nothing I try works.

 

The manual and the website seem to indicate that F28 could be it, but what I have (passenger side/front/front) doesn't match what I find when I open it up.

 

 

It's close, but not the same, but still empty.

 

 

If I flip this around and look at the other side, there's 4 more that seem to match the diagram at least.

 

 

I don't have fuses/breakers in the bottom 2 slots there which seem to might be for 2021+, but the top 2 I pulled out, tested continuity, and they are fine.  Close up shot of them:

 

 

Am I even in the right ball park here?  Anyone else able to check their truck to see if I'm supposed to have the bottom 2 slots filled up?  I tried moving the breakers from the top 2 to the bottom 2 and it didn't change anything I could notice.

 

If I'm supposed to have something in F28 in my first picture, it's 3 prongs and doesn't look like what's in my manual.

 

[PhilB]

Have you checked your owner's manual?  You can see it online at mygmc.com if you don't have the printed copy.

 

On page 359, it shows the fuse panel layout for F27/F28.  It is a 2 prong fuse that you shift left/right if you want RAP power or not. 

 

On page 360, it shows circuit breakers.  CB2 is for the cigarette lighter.  

[Maverick0984]

Yep, I have.  You hit the nail on the head of what I'm struggling with here. 

 

I guess I didn't consider it was a 2 prong fuse that shifted position.  It's absent in my first image though so I need to try and source that part, but I also don't know which cigarette lighter it's referring to as there's 2 of them.  One on the front dash, and one in the rear.  

 

What does RAP power stand for ?

 

EDIT: Retained Accessory Power, got it.  Does that mean "On" when in Accessory mode?

 

Trying to find the amperage and a model number of the fuse I need but struggling.

 

 

Edited December 20, 2025 by Maverick0984

[PhilB]

I checked my truck.  I have a 50 amp fuse for F27.  After some research, I found the part number is 22917200.

https://parts.gmparts.com/product/gm-genuine-parts-50-amp-fuse-22917200?srsltid=AfmBOorMmGfBUjlVjl5hoTbScd4kVu7ax912Grfj_trrjnJychFaRUiS

 

[Maverick0984]

3 minutes ago, PhilB said:

I checked my truck.  I have a 50 amp fuse for F27.  After some research, I found the part number is 22917200.

https://parts.gmparts.com/product/gm-genuine-parts-50-amp-fuse-22917200?srsltid=AfmBOorMmGfBUjlVjl5hoTbScd4kVu7ax912Grfj_trrjnJychFaRUiS

 

 

Thank you so much!  I saw 50 on an older truck for what I think it the same thing but just felt awfully high for what it's feeding so was worried I'd eventually damage something.  This makes me feel good about the choice.

 

Thanks again for the help!