Cruise Control Fixed
by, 03-18-2010 at 09:47 AM (1096 Views)
Well, after owning the Suburban for about 3 years with no cruise control, I fixed it! I always knew what the issue was, but didn't want to spend the money to fix it.
The cruise control servo on my suburban is an old vacuum motor style. It has a rubber diaphragm with an aluminum boss on it that is a loop to hold the hook-side of the throttle linkage. Well, that loop had ripped out on my previous cruise control motor, so the cruise couldn't pull the throttle.
Replacement of the cruise control servo was moderately easy. It's held in by 3 9/32" screws that you must remove blindly because they face the firewall. The servo then comes off the bracket. Remove the 2 differently-sized vacuum lines, and the electrical connector. Installation is reverse of removal.
I tested the cruise, and it works! It appears I still need to adjust the control linkage slightly, as the cruise steps up your speed about 3mph over what you set the cruise to. However, keeping this in mind, I should still be able to set and hold cruise speeds with no issue. I'm so happy!