P2671 Actuator Supply Voltage B Circuit High

[redncrash]

Hello,
My 2005 GMC Yukon XL 1500 Autoride 4x4 5.3, is intermittently pulling OBD2 scanner code p2671. It pulls this code twice. The only symptom is right before code illuminates, when driving between 40-50 mph is the transmission jumping between 3 and 4 gear. This SUV runs great! Transmission shifts smoothly at all other speeds. I have researched for several days with only very confusing information. Can anyone help?

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

@NickTransmissions is our resident transmission expert, and he may be able to provide some troubleshooting tips.