A cable drives the speedo on that year of truck.
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
Look near the rear of the transmission on the driver's side.
Most likely the wiring connector that connects the fan speed switch to the motor circuit has overheated and some contacts no longer transmit power.
Count the gears. Take of in 1st, and simply count the shifts. I think you will find this is a 3 speed automatic with O/D
Are the door interchangeable on an 1987 chevy truck and an chevy blazer 1988
1987 Chevy head bolt torque 2.5L?
if this happens at a certain speed it's probably the alignment of the tires.
There are several things you can do to repair your speedometer. You can replace the speedometer cable. You can replace the speed sensor in the transmission.
A 1987 Chevy Silverado has a 20 gal. fuel tank
Yes, it will.
Getting the wong type of fuel in the car? :)
What's the color code on a 1987 Chevy Caprice classic brougham