Cruise control does not work after having power booster replaced

Certainly there is a connection between the brake and the cruise control as applying the footbrake would cancel or pause the cruise control. I am not sure about the speedo though.

Your description suggests there is something deeper going on due to the lurching and you should take the vehicle back to the repairer that replaced the booster and complain bitterly.

Could be a faulty cruise control servo activator. The power to move the cruise control Actuator is most likely coming from the Brake power hydraulic booster vacuum pipe and if the cruise control vacuum servo is failing and leaking in air you lose the brakes power hydraulics.
check the vacuum pipe coming off the power booster brake master cylinder vacuum pipe you may find a tee connector in the vacuum main pipe and follow it to see where it goes to. Could be a break in the cruise control vacuum hose but if it is only happening when the cruise control is activated a fault or leak in the cruise control servo device is the main suspect. Which you should find at the other end of the cruise control vacuum hose.

Give me some more information about this problem. May be i can help.

hello there:
you may have over looked the vacuum line for the cruise control that hooks up to or close to brake booster hope this helps you out..sincerely D.Jones

Check the brake light swihch, make sure it functions correctly aslo see if there is another switch by the brake light sw some gm cars use more than on switch. make sure the linkage for thec/c cable is connected at the throttle body, the control module for the c/c control is below the power brake booster hope thi helps

The cruise control mechanism is in the area of the booster, so it is possible they had to remove it to get to the booster. It may just be unplugged.

the brake light switch is out of adjustment, the cruise thinks you are stepping on the brake. you will need to get the plunger on the switch to the right length and then your cruise should work

use a scanner to check the abs system . most of the time the abs brakes and traction control system work together. your cruise control . unit has a servo motor .in front right fender well. check the fuse and relay also the cruise control brake release switch. and the brake light switch.if all is good you have a cruise control module problems. dealer ship job.

If you see fluid at the rear of the master where it attaches to the power booster then the cylinder itself is leaking. It's not often that the container leaks.
The hissing noise is very likely coming from the power booster. This must be replaced. If cruise has a vacuum hose that connects to hose to booster it's possible that vacuum loss at booster is causing the cruise problem.If you are going to do the booster, have a good tech take a look at it first. they are expensive and you don't want to change it on my advice alone...I'm not there and can't hear it!