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Thank you so much, this really helps meCruise control.... Switch in the middle turns the system on. Over 25mph if you hit the button on the end it will engage the cruise module. push the switch to the right will accelerate, push and hold the button on the end to decel. far left is off.
I was just about to pay someone to install cruise control on the truck because I have to drive 4 hours and I only get about 12 mpg highway and I hoped cruise control would help. And thank you for the information about the transmission, this is my first truck I bought for $900 and I’m trying to learn everything I can so I don’t have to pay people to work on it.Brandon beat me to it, but I'll add, if it's not working as expected (now that you know what the switches do) - it's very common for the lever to have broken wires in the bend where they go into the column. Somewhat less common but if the previous owner didn't use the cruise, the switches can get dirty/oxidized contacts. I've revived a few of them by spraying lots of DeOxit contact cleaner into them and "work" the switches a bunch until they begin responding.
BTW your '91 will have the 700R4/4L60 transmission, no "E" on the end. It uses a cable (throttle valve cable, referred to as the TV cable) from your throttle body down to the transmission in order to control line pressure and shift behavior. You'll see it mentioned quite a bit when discussing transmissions in these trucks, and its adjustment is critical to the life of your transmission. If it's behaving correctly, don't mess with it. In 1993 the 4L60E hit the scene in the light duty trucks and is electronically controlled, eliminating the TV cable.
Richard
I’m not gonna lie, I’ve owned a GM product with that cruise control style for 13 years and never knew that… Cruise control.... Switch in the middle turns the system on. Over 25mph if you hit the button on the end it will engage the cruise module. push the switch to the right will accelerate, push and hold the button on the end to decel. far left is off.