The only thing in common with the two circuits you are describing is the brake light switch on the top of the brake pedal. It is also possible that the switch might be adjustable and has moved out of its proper position. From http://en.allexperts.com/q/GM-GMC-781/2002-Chevy-Tahoe-brake.htm
Are you sure you need the fuse for the cruise control. My cruise control wasn't working, neither were my brake lights. All 7 bulbs were burnt out. When the brake lights were replaced the cruise control worked.
The cruise system shares fuses with the engine and brake lights. If the car runs and the brake lights work, it is not a fuse.
One for brake lights, one for cruise control. If you hit the brakes when using cruise control, that second switch is what tells the control modules that the brake is being depressed.
I had this same problem with my 2003 Venture. The Cheverolet dealership told me that the cruise contol is directly linked to the brake lights. The simplest and cheapest place to start would be to check your brake lights...if they are not working, you will not have cruise control.
The cruise control is fed by the engine computer through the brake light switch. It does not have a separate fuse.If the engine runs and the brake lights work, it is not a fuse.
No cruise control or fender mounted brake lights on a 2002 Tahoe could mean a short in the wiring or the ground wire has failed. No cruise control is also a result of a bad oxygen sensor. Most GM made vehicles have two oxygen sensors.
Common issue...if the brake light swith is not working; the cruise control will not engage and your brake lights will not go on. replacing switch is easy and inexpensive...its located in the upper part of the brake pedal.
There are two. The brake light switch and the cruise control cut off switch. You are probably talking about the cruise control cut off switch. When you depress the brake pedal, the brake lights come on and the cruise control stops. Hope this helps
Start by removing the connections for the cruise control and brake lights, then remove the bolt that holds the switch to the brake pedal. Once the brake pedal is loose the switch is held on the brake pushrod by a bushing with nylon retaining washers. Carefully remove one washer and slide the bushing out, the switch can now be removed from the pushrod. Installation is the reverse; line up the hole on the switch with the hole on the pushrod, make sure the tabs for the cruise control and brake lights are facing properly. Reinstall the bushing and replace the other nylon washer, replace the bolt and tighten. Lastly connect the brake lights and cruise control.
The cruise system shares fuses with the engine and brake lights. If those work, it is not a fuse.
Sounds like the brake light switch is broken or out of adjustment and yes it would cause the cruise control not to work.
On most vehicle the brake switch is one way to shut the cruise off.