SOURCE: cruise control wont work
normally the brake switch is the issue with these trucks. it is located under the dash where the brake pedal meets the linkage to the brake booster.
SOURCE: cruise control does not work
Have you had this campaign done yet?
06030: Product Safety - Brake Lamps Inoperative or Continuous Illumination
If the switch is malfunctioning the cruise control will not engage.
SOURCE: 2007 GMC Yukon Cruise Control
Check the speed sensor. Look up the location at autozone .com or google. It is either near the tranny or at the passenger side wheel. The speed sensor is almost always connected to cruise control problems.
SOURCE: my cruise control is not working but the light
The multi purpose wand the includes the cruise control, wipers, high beams and turn signal, might have a short in it. Since the light comes on at first and immediately goes off makes me think the fuses are fine and it just a capacitor inside that wand. GM wants almost 500 for the part on my 01 Sierra, but you can easily find them online for around $90
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SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control
May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.
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