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you should have an idle screw by the throttle body lever. usually, all that is required is to turn the screw clockwise to increase idle speed, counterclockwise to decrease the idle speed.
You may have an intermittent slow response on the rear O2 sensor, I'm not sure if you have a pre and post O2 sensor, off the top of my head, but I would get the system hooked up to a monitor to see if there is any pending codes (big change over from 1994 to 1995). Is it an OBDII system? As far as the stumbling, I have a 91 silverado with a 5.7L engine and it's had a very light stumble at idle since new, day one, and every sensor is on target, idle, 1000 rpm, 2000 rpms, 3000 rpms, and still has a slight stumble with all sensors within range. To this day it still has a slight stumble but it still runs great, Good luck, Gary
there 3 sensors, the first is the speed sensor located on top of transaxle, then the NC speed sensor located rear of transaxle and the NM speed sensor located on the front of transaxle,(transaxle = transmission) there are a couple of solenoids also, heres a diagram to help you, hope this is helpful.
Hello l_anderson36: My name is Roger and I will help you. You should find the map sensor at the front of the engine. Located on the drivers side of the engine. The sensor will have a plug with three wires on it.
Should you need further help please just ask. Please rate the quality of this answer. This way we know your answer helped. Thank You for using Fix Ya.Roger
The speed sensor is located on the transmission towards the tail shaft. The housing that encloses the cable will attach on the side of the tranny. At this connection you will find the speed sensor right where it attaches to the tranny. There will be a couple of wires attached to the speed sensor.
Your car has the 4L60E trans,and the speed sensor is located in the tailshaft of the trans.The tailshaft is located on the rear of the trans,and is held onto the trans with 4,15mm bolts.The driveshaft slips into the tailshaft.The speed sensor will have at least 2 wires going to it.The speed sensor will be located either on the driverside or passenger side of the trans.95 was a transitional year,so the speed sensor could have been mounted on either side.Good luck
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