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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: Weekender84 on March 22, 2016, 10:48:49 am

Title: Unknown vacuum line
Post by: Weekender84 on March 22, 2016, 10:48:49 am

I have an 84 k20 Silverado and I have a vacuum line the runs up to the firewall and plugs into a sensor. What is that sensor?

Title: Re: Unknown vacuum line
Post by: bd on March 22, 2016, 04:10:13 pm

Possibly the torque converter clutch (TCC) Switch.  Can you post a pic?

Title: Re: Unknown vacuum line
Post by: Weekender84 on March 23, 2016, 05:47:08 am

I will tonite, thanks