1990 brake light switch

[57 3100]

guys, i see the brake light switch in my 1990 k-1500 with auto trans, is way up in there. how hard is it to replace ? any special tools ? i dont think my year is held in with a metal clip ?
my cruise control has stopped working and i seem to have the correct power from the cruise control switch, and was told it could be a faulty brake light switch, so i want to try it.
thanks

[ChevyTech]

For C/K trucks 1988 to 1993

Brake Switch mounting – Installing:
The body of the brake switch should not move with the pedal at all.
When you have the switch removed look at the side of the switch that would be towards the parking brake pedal if the switch were still installed. There is a protrusion on the switch that must slide into an opening where the switch mounts. Somewhat like a big square lug into a slot. If not installed with the Lug inside the grove it belongs in the switch will move and not stay in adjustment.

Brake Switch adjustment
Here is how the switch is adjusted:
On the curved side of the switch, which is pointing down and somewhat towards the front of the vehicle when installed, the end of a lever protrudes slightly out of a slot.
While holding the brake pedal down a little ways, slide the lever that protrudes from the slot toward the driver’s seat.
Let go of the lever, then return the brake pedal to its fully released position, and the switch should self adjust.

[57 3100]

thanks so much for the info ChevyTech. i hope to replace the switch this afternoon after work.. i will let you know how it goes, and if it fixed my cruise control problem. thanks again.

[3strats]

Ahh Haa! I too am having the same problem.(i think). If i'm thinking correctly the brake switch has something to do with the trans locking up as well? Cruize doesnt work and trans will not lock up until i put my left foot under brake pedal and pull up towards steering wheel. Works fine after that. Am i crazy?

[3strats]

Sorry. I always forget. 1990 model c1500. 5.7ltr. TBI. 700R?. Black. Whiskey dents on doors(PO).

[ChevyTech]

Originally Posted by 3strats

Ahh Haa! I too am having the same problem.(i think). If i'm thinking correctly the brake switch has something to do with the trans locking up as well? Cruize doesnt work and trans will not lock up until i put my left foot under brake pedal and pull up towards steering wheel. Works fine after that. Am i crazy?

No, you are not crazy.

The adjustment on this style brake switch moves way to easily.

Try just adjusting the switch but if it gets out of adjustment again, you should replace the switch.

[3strats]

Cool. Thanks for the info. Hate to jump into the middle of a thread like that but this site has a ton of useful information. Its good to have guys that are willing to help out as much as they do. Thanks again.