1991 C1500 TURBO 5.3/4L80E

[RDF1]

Also I'm over 7500 miles on it now too.
Driving about 60 ish miles a day. Soon it will be 95-100 miles a day when we move to the new place.

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[Christian Steffen]

Also I'm over 7500 miles on it now too.
Driving about 60 ish miles a day. Soon it will be 95-100 miles a day when we move to the new place.

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Glad to hear it's working well!

 

[RDF1]

Got cruise working this evening. Wished I'd got it going sooner....

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[Sparkysikes]

Great diagram have mod Mark this for future reference.

 

[RDF1]

12,000 miles on it now. Had to fix the turbo oil feed hose. Turbine blanket moved back some and the heat kinda messed up my hose. So I had left some slack in the line just incase.
Trimmed off 3" hose and rear connected it.
Ordered a SS PTFE lined braided hose to replace it with.
Besides that, she has been rocking on along.

Been averaging 18-19 mpg lately too. Can't hit the 20 mark for nothing.

Once I get my shop built I'll throw the 3.08 rear end in it and see how it does.

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[RDF1]

Great diagram have mod Mark this for future reference.

I forgot to add.
The signals from the switch to the cruise box for Accel/Resume Coast/Set are 12V+.

And I found out that for my cruise to work the first time I have to press the brake pedal once. Then it works as it should.


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[Sparkysikes]

That's odd. Why do you have to tap brakes once? I know to disable, but to initiate

 

[RDF1]

That's odd. Why do you have to tap brakes once? I know to disable, but to initiate

I dunno. Can't figure it out.
First day I wired it up I had enabled the cruise switch and everything worked cause I had hit the brakes while going out the driveway.
The next time I tried to use cruise it wouldn't work. Finally figured out I had to enable cruise switch, hit brakes once, then I could set my speed and go.

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[Supercharged111]

If you do a 3.08, will you be able to boost off the line?

 

[Dubs]

I forgot to add.
The signals from the switch to the cruise box for Accel/Resume Coast/Set are 12V+.

And I found out that for my cruise to work the first time I have to press the brake pedal once. Then it works as it should.


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Sounds like you have the brake switch and the cruise on switch flipped around. Brake should deactivate.