Mechanics

P1860 TCC SOLENOID

GMC Jimmy

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?
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Ronnie99
March 21, 2007.



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

Tiny
Scottsqcc
Oct 6, 2008.


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