Stumped on Readings

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Oct 27, 2011 | 11:59 AM

Nowhereman

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Launching!

Joined: Dec 2009

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From: California

Stumped on Readings

Gotta smog my LT1 Yukon this month.
I thru the handheld on it and found 2 issues.
1. Throttle position sensor
2. Shift solenoid A

I replaced the position sensor and re flashed.
The sensor issue went away with just the solenoid A being left.
I replaced both A and B shift solenoids in the trans and checked again.
The fault still shows shift solenoid A.
Anyone have any other ideas on what could cause this?

Oct 27, 2011 | 12:11 PM

FAD2BLK93

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From: POULSBO WA.

Did u clear the codes? And they still came back after cleared them?

Oct 27, 2011 | 12:16 PM

LT1FirebirdSLP

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Clear codes, then check wiring. Problem could be outside of the sensor if one of the wires for the sensor is grounding out.

Oct 27, 2011 | 12:48 PM

Nowhereman

Thread Starter

Launching!

Joined: Dec 2009

Posts: 273

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From: California

Called GM and they said that for the year that I have; 99. the connection on top of the transmission is the likely culprit.
This means that I have to drop the tranny to check some stupid plug / connector.
Why in the Hell didn't they just design the connector where you can get to it without dropping the trans.