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    AC Delco Plug Wires Will Not Stay On

    Guys what is the trick to getting a set of AC Delco plug wires to stay on the distributor? I bought a set for my 90 GMC Sierra 5.7l a few years ago. I had the same issue. I push and push to get the wires onto the dist but they just will not click on or stay on. I took them back and bought a set...
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    Passenger Side Windshield Washer No Working

    1990 GMC Sierra 5.7l As the title states the passenger side will not spray. Driver's side works fine. I checked for clogs in the nozzle but could not find any. The guy at Autozone said this truck has 2 washer motors and that one is bad. I thought there was only 1 motor and that hoses branched...
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    Transmission Fluid Dripping From Front U-Joint

    Guys I am sorry if this has been asked. I am not having any luck with search function and no response in the tranny section.Truck is a 1990 GMC Sierra 5.7l auto with 157,000 miles. 2x4. Truck has been sitting for a while which I know is not good for it. But it has been sitting. Talking 8 to 9...
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    Tranny Fluid Dripping From Front U-Joint

    Guys I am sorry if this has been asked. I am not having any luck with search function. Truck is a 1990 GMC Sierra 5.7l auto with 157,000 miles. 2x4. Truck has been sitting for a while which I know is not good for it. But it has been sitting. Talking 8 to 9 months. Anyway I have 2 questions. How...
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    Oil Pressure Sensor Question Again

    Can someone please help? 90 GMC Sierra 5.7l TBI, I bought the socket that fits the new oil pressure sensor. But the socket does not fit the old sensor. The old one is much larger than the new one and the tool I bought. Diameter and length. Can someone please tell me what size socket I need to...
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    90 Sierra Oil Pressure Sensor

    So my back and shoulder are feeling better today so I decide to tackle the oil pressure sensor in my 1990 GMC Sierra TBI. I take the dist cap off and I can finally see the sensor. However I don't have any tool at all where I can reach the sensor. Not without taking out the distributor. And I...
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    Muffler Question

    1990 GMC Sierra 5.7l TBI with 156,000 miles. I need a new muffler. The pipes are still good. I went by Midas only because they are really close to my home. Guy said that because the original pipes are welded to the muffler I can not just replace the muffler. He said I have to replace pipe from...
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    90 Sierra Speedometer

    1990 GMC Sierra 5.7l. Last night when starting from a red light my speedometer wasn't registering anything. My truck has the moon gauges and the truck wasn't mooning me. Nothing until I gave a light tap on the plastic face of the gauges. Then the speedometer came to life again. Worked fine the...
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    Oil Pressure Sensor

    Can someone please tell me where the oil pressure sensor is on my 90 GMC Sierra with 5.7l? I was told it was on the engine block back by the distributor but I'll be damned if I can find it. Is it located on the driver's side or passenger side? I have tried doing a search of these forums but I...
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    Opinions About Muffler Sleeves

    Sorry if this has been talked about before but my search of the forums returned no hits. I have a 90 GMC Sierra 5.7l with stock exhaust. She has a hole in the muffler and it needs to be replaced. I am not a mechanic by trade but I do most of the work on my truck. I want to try and replace the...
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    Ignition Switch?

    Hey guys. 1990 GMC Sierra 5.7l TBI 155k miles. Twice in the last week I have turned the ignition to start the truck and nothing. The moon gauges spring to life and I hear what sounds like marbles clicking together behind the gauges. So there is power. However the truck will not crank over at...
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    A/C System Replace

    Hey guys. Long time lurker here. I have a 1990 GMC Sierra regular cab with the 5.7L engine. The truck is stock and has 154,000 miles on it. This truck runs as great as the day it came home from the dealer. But I am in Texas and it's getting hot. I have gone the past 3 summers without A/C but I...

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