P186 TCC SOLENOID

GMC Jimmy

Tiny

ronnie99

March, 21, 2007 AT 7:19 PM

I have a 99 GMC Jimmy with 99,000 miles, V6, 4.3, 4X4.

This truck has given me no problems, but 2 days ago the engine light came on, so I hooked it up to a scanner. I'm getting code P1860, TCC PWM Solenoid CKT Eletrical

If this is really a fried solenoid wouldn't I have some shifting symptoms? The truck is not sluggish, shifts fine, runs good, no strange noises or smells.

Is it reasonable to think this might just be a bad wire, and if so is that something a reasonably competent person could replace on their own?

FOUND 15 RELATED QUESTIONS

P1860

15 ANSWERS
5 IMAGES

1 Answer

Tiny

scottsqcc

October, 6, 2008 AT 6:14 PM

TCC just engages at highway speeds. The 2 cars I have had had a bucking at highway speeds. I believe that sensor would be easy to change just by dropping the pan because the valve body is right there. Little trickier on fwd cars. Hope that might help.
Scott

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