Nightmare 2004 denali

[TahoeLS]

Okay I bought this 2004 Yukon Denali I removed the all-wheel-drive system made it 2 wheel drive and put a 4L80 in it also put a mediocre cam TB SS intake whatever that's not the point I'm not going to go anymore with the mods the truck is giving me terrible problems and the brakes feel like they're always holding back I replaced the passenger front caliper and two front brake lines also two new hubs in front and today I replaced the rear right speed sensor on the differential reset the battery try to erase the codes with my b******* scanner and they will not go away for some stupid reason it is pulling performance out of the truck and has a disgusting idle other than the cam it's idling worse and is dead from the line someone please help I keep dumping money in it and nothing is fixing anything

The codes are C0186,C0050,C0244

 

[about20ninj45]

Ok who swapped the trans for you and did the tuning? Which software did they use? It sounds as if some wiring got messed up along the way or no one did the correct segment swap. There is also a relay method to get around the pulse width modulation, but it seems as if you pcm isnt seeing the correct speed. Iirc, the 4l80 has one speed sensor and the 4l60 has two.... Or maybe it's the other way around. But either way, you have to respond the existing wiring to make sure that the pcm is seeing the correct speed/gearing. It also affects your traction control, which should put you into reduced engine power mode.

 

[about20ninj45]

Was the car tuned for the cam as well, and do you still have the original pcm in the car?

 

[TheAutumnWind]

Which scanner do you have? C0050 is right rear wheel speed sensor. I fixed mine last week that got snagged on something and ripped in half. Can your code reader clear abs codes? many cannot. I had to get a better one in order to do so.

 

[TheAutumnWind]

Which scanner do you have? C0050 is right rear wheel speed sensor. I fixed mine last week that got snagged on something and ripped in half. Can your code reader clear abs codes? many cannot. I had to get a better one in order to do so.

C0186 check your yaw sensor? Same deal iirc a lot of scanners can't clear that.

 

[01ssreda4]

Okay I bought this 2004 Yukon Denali I removed the all-wheel-drive system made it 2 wheel drive and put a 4L80 in it also put a mediocre cam TB SS intake whatever that's not the point I'm not going to go anymore with the mods the truck is giving me terrible problems and the brakes feel like they're always holding back I replaced the passenger front caliper and two front brake lines also two new hubs in front and today I replaced the rear right speed sensor on the differential reset the battery try to erase the codes with my b******* scanner and they will not go away for some stupid reason it is pulling performance out of the truck and has a disgusting idle other than the cam it's idling worse and is dead from the line someone please help I keep dumping money in it and nothing is fixing anything

The codes are C0186,C0050,C0244

Very quickly it seems like you have an ABS malfunction. Whether that can cause power issues Im not sure. (Not that Im aware) Don't listen to inexperience who say that's related to the trans cause it isnt. ABS and PCM are two different computers who run independent systems with individual sensors. Period. You seem to have abs codes, I'd start by trying to get them cleared.