Syclone Cruise Control

[Wildeone5]

I have a question about my cruise control. I have about a 30 mile (each way) drive to and from work. In the morning the cruise control works flawlessly. In the evening, not so great. When I go up hills it will drop 10-15 mph. Sometimes it will drop all together. I have had to service station 3 times. The first time a hose had come off and they fixed it. The second time several of the hoses under the battery were rotten and were replaced. This last time I was told the only thing left is a transducer (sp). Any thoughts? I did notice that the brakes were much firmer after the rotten hoses were replaced. Thanks.

John Wilde

 

[SY2455]

Re: Syclone Cruise Control

Replace all of your vacuum lines. Use zip ties in place of the factory clamps.

 

[Black Knight]

Re: Syclone Cruise Control

I would say that sound right, I mean youve replaced everything else related to it. I dont know I jurked mine out of the truck the first couple days I got it, never use it anyway!!!

 

[Wildeone5]

Re: Syclone Cruise Control

Does GMC call it something other than a transducer? I have been looking for parts and I don't see anything under transducer?

 

[SY2455]

Re: Syclone Cruise Control

Does GMC call it something other than a transducer? I have been looking for parts and I don't see anything under transducer?

Are you talking about the Sero Unit? (This is the vacuum operated diaphragm) that operates the throttle while on cruise control. There is a real good section in the repair manual that covers the testing and repair of this starting in section 9-1 thru 9-16