What carburetor came with my '77 K20 Camper Special?

[Titomars]

Originally Posted by Man With A Gun

GM 6494922 part for servo

Yes, That is the correct part number for all 73 thru 77 C,K models. Interesting note the parts book says at that printing the servo listed for $28.40. I expect you'll have to pay a lot more for one today.

[Man With A Gun]

I'm already about to give up on finding this servo.

How about if I built a cruise from parts that are available today? What year Chevrolet truck would I need to buy parts for?

[cadillac_al]

They used to make aftermarket cruise controls. My truck had one on it. My dad put one on a car years ago and it seemed to work fine for the life of the car. I guess that would be a last resort option.

[Man With A Gun]

I still see vacuum servos for other manufacturer models.

Is there another brand that will work on this '77 K20?

[hatzie]

You could use the self contained electric servo cruise (Electro-Motor) GM used on at least the 88-98 T400 & the same vintage B bodies along with a raft of other 90's models. You'll need a JTR VSS pulse transducer in place of the cast pot metal Cruisemaster vacuum transducer. Hot rodders have been using that one for years.
It uses positions A,B,C,D,E,F, K, & maybe J on a Delphi Metripak 150 10 position connector that you should be able to source online or just liberate the entire cruise sub-harness from your donor.
Here's a complete unit & cable with no harness. http://www.ebay.com/itm/1996-Yukon-B...80c9d4&vxp=mtr

My scan of the 88-98 T400 Electro-Motor cruise control service training manual is in my RTFM link. That manual has the electrical sub harness schematic and instructions on troubleshooting.

[hatzie]

Thread on Fiero boards about using the Electro Motor unit.
http://www.fiero.nl/forum/Archives/A...-2-030708.html
Looks like terminal J may run a "Cruise" light.

[Man With A Gun]

Awesome! I'll sort through all this info later.

One question though- can I use my non resume stalk switch or do I have to install a different switch?




Oh, also- my truck originally came witht the th400 trans but it now has the th350. Will this eBay cruise work for my th350?

[hatzie]

The electro-motor cruise units need VSS, Brake/clutch pedal switches, stalk switches, power, and ground at a minimum.
This is not a bolt on with all the pieces included. You're going to have to buy a VSS unit and add it into the harness, fab some brackets for the cable, mate the cable to the carb linkage, and mate the electro-motor harness to the turnsignal/cruise stalk, brake, and clutch pedal switches to make it work.
The '77 single button turnsignal stalk switch isn't going to work. I used a Dakota Digital HND3 turnsignal stalk in place of the cruisemaster stalk on my '76. In the end it cost me just over $150

[Man With A Gun]

Have you got a pic of the new stalk you can post up?

[hatzie]

Originally Posted by Man With A Gun

Have you got a pic of the new stalk you can post up?

Google?
https://www.google.com/search?q=Dako...+HND3&ie=UTF-8

[Man With A Gun]

thanks hatzie