brian2

Thanks for site and codes info. I have a CJ2 build code on my truck so I need a 13525291.

I have been using felpro 70820 washers with my oil changes. I am happy with them. I may start reusing them now that see the current pricing on them.

Which ambient light sensor 13525289 or 13525291 should I get for a 2017 GMC Sierra? Both come up as correct part for my truck (with VIN) on the online parts websites. Does anyone know the difference between the two sensors except cost and part number?

They are still available, but will likely be purged when I the weather allows for garage spring cleaning.

More Information: The 9 of 10 volume set weights 50 plus lbs. Everything is still available. Pickup location would be East Bay, CA. My better half has requested, that get this project out of here, so I will entertain any offers. picture attached to show what is available

I have extra 2017 service manuals volumes from my HELM purchase of GMT17CKPU ten volumes set. I have volumes 1,3,6,8 available along with almost complete 9 of 10 volumes set which is missing volume 5 available. All of them are as they arrived from HELM, which unfortunately mean the paper covers have light damage. It is long story about my purchase, and I how I ended up with them, but HELM is disaster in how they currently operate. I will add information to post depending on what the interest is in them.

I find this thread interesting. I had a long list of error code on my 2017 GMC Sierra, which I addressed most with clean the tightening poor frame grounds. I thought after correcting the ground near the ABS control module, I would have finally cleared the U0121 code. I am down to just three codes U0121, U0140, & B127E. It looks like I will need to go deeper into the wiring. Where does one get wiring diagrams and connector diagrams from now days? In the past, I would always invest in shop service manual. I was shock to see the price for a shop manual given I think I only spent $150 on manual from 1999 GMC Sierra. It likely make more sense to use online service to manual. What recommendation at there for shop service manual? Is ALLDATA my only option?

Was this a splice connection or a connector plug? Was the problem in harness or at plug? Pictures? Thank you posting your information.

My random blank radio screen went away (plus a bunch of other random problems and codes - including folding mirror) after cleaning main ground to frame and other frame grounding points

I am looking to replace the trailer brake control switch on my 2017 GMC Sierra as the first step to hopefully addressing the random "service trailer warning". I believe the correct GM part is 84109447, but it appears to include the "Switch Bezel". The bezel shown will not work on my truck because mine is a 4x2. So can I just get and use the GM 84108373 switch instead of disassembling the new bezelled part for just for the 84109447 switch?