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    Suburban Rear AC not circulating refrigerant

    on my 1990 suburban, i have been fighting AC issues since my sanden gave up the ghost. All lines flushed and blown out (including rear lines and rear evaporator core, blown from where the expansion valve connects), evaporator core flushed and blown, new condenser, new orifice tube, new...
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    TCC issues on 4L60

    1990 V1500 Suburban. I've owned it for 5 years and changed trans fluid and filter every 30kmiles. 200k miles on the truck, of which I have put on about 75k. unknown maintenance history before I got it, but I keep up on things and it wasn't hacked to pieces when I got it. after some highway...
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    engine vacuum fast fluctuations

    https://photos.app.goo.gl/5BcWXC8eG9PDNeLe8 hopefully this link works. been fighting a rough idle since summer. full tuneup and TBI rebuild in the last couple months. compression test shows 180psi on all cylinders, so the valves aren't leaky I don't think. I finally put the vacuum gauge on...
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    suburban rear quarter glass replacement

    I had a limb fall from a tree and spider web the rear quarter glass on the passenger side rear door. The GM manual shows the quarter glass and the channel run are a complete unit. But I see just the glass with gaskets/trim for sale without the channel run. could I take the channel run off my...
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    OEM auxiliary engine oil cooler fitting size on 1990 V1500

    my OEM auxillary engine oil cooler is leaking a little at the top of the cooler. I want to make sure the new cooler will work, or if I will need some adapters, before I take anything apart. Does anybody know what size the fittings are on the OEM auxillary engine oil cooler?
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    Bad window motor?

    1990 suburban. 3/4 windows operate just fine. 1 window (rear driver side) just started acting up today. same behavior from both Master switch and door switch. same behavior in up and down direction. it will move about 6in and stop. wait a couple sec and try again and it moves a couple...
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    rear wheel 4x4 OEM hubcap

    I lost one of my rear hubcaps. I'll pick up a plastic replacement, because that is all that is available. if somebody has a metal OEM one let me know and we can work a deal. 1990 v1500 suburban with aluminum wheels. but I believe the rally wheels use the same cap.
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    water leak into cab through floor vent over brake pedal

    I have a suddenly new leak into the cab of the 1990 suburban. I washed the truck recently to knock off the road salt. after, I noticed some water on the driver floor. I just assumed that my 7yr old son directed some high pressure water into the door/body gap and it blew past the seal when he was...
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    more wiper and washer motor fun

    I had previously had issues with the delay wipers on the 1990 suburban. The pulse module and switch were replaced, but were not the culprit. it was the motor that needed to be replaced. Likely the onboard circuit break was getting weak or the park switch bad. All was good for 6 months or so...
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    89-91 LMC headlight upgrade

    I finally got around to upgrading the headlights on the 1990 suburban. I had previously added relays when I was using sealed beams, and that definitely made an improvement in down range light. LMC finally had their upgrade lights in stock that take 9006xs (low beam) and 9005xs (high beam)...
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    wiper linkage adustment on 85+

    My wipers on the 1990 suburban move down just a bit before they start their upward sweep when I turn them on or when they pulse in delay mode. This causes an issue with the delay wipers because part of the pulse is used to move the wipers down and the pulse isn't always long enough to get them...
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    EGR Replacement - make sure you get a Delco

    I had a high idle and surging issue after getting off the highway and/or long drives. I would also occasionally get EGR check engine light codes. I finally pulled the EGR, and it didn't seem to be in good shape. seems it is probably lazy closing after being open for extended periods of time. I...
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    delay wiper pulse module for 85ish and up

    I couldn't find the ac delco or a OEM replacement part anywhere for the wiper pulse module. it seems the inventory dried up. but I found the same ac delco part number (15598496) at workhorse parts for a GM based work van. took a chance and it is a direct replacement. just passing the info along...
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    flapper in air intake hose

    what is this? the hole on the bottom is not connected to anything. stock 1990 350 tbi in a v1500 suburban.
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    1990 Suburban Rear Passenger Window Switch

    The rear passenger window switch stopped rolling the window up. The window operates normally from the driver switch. The window operates down from the rear passenger switch. I looked at the wiring diagrams and followed the troubleshooting in the wiring manual (shown below for reference). I get...
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    voltage at idle with and without accessories

    1990 v1500 suburban, 350 TBI with stock 105amp alternator. idle with nothing on - 13-13.2v at battery. idle with ac, blower on high, rear air on high, lights on, aux fan on, radio on, fog lights on, basically everything that turns on is on - 11.8-12v at battery. engine at operating temp in...
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    power window master switch

    1990 V1500 Suburban. the driver door master power window switch stopped working for the rear passenger window. also, when i push the switch, it pegs the voltmeter down to the bottom of the gauge. the switch on that window still works. i am pretty sure the ground for all switches goes through the...
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    adjusting low pressure cutoff switch after R134a conversion

    my 1990 suburban was converted to R134a before i purchased it. i have never been happy with the AC performance at idle or in stop and go traffic. it cools well at constant speeds on backroads or on the highway. i plan to add an auxillary cooling fan to help put more air across the condenser at...
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    Location of heater and AC actuator?

    The AC, heat, and defrost in my 1990 v1500 suburban works as it should except the air flow is split between floor and dash on the AC, MAX AC, vent, and heat settings. The defrost works as it should. Based on looking at how the system operates, I think there is an issue with the heater and AC...
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    1990 v1500 suburban 700r4 leaking when hot/hwy driving

    Truck has just under 150k on it. 350 TBI, 700R4, NP241. All stock drivetrain. My transmission has started leaking while driving on the highway. It doesnt leak much, if at all, on short trips around town. But if I get on the highway and it starts drenching the pan and dripping on the exhaust...
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    Steering correction for 4in lift

    I bought this truck with the lift on it. Been getting an occasional steering clunk so I started looking around. Based on the photos, it appear I need a drop pitman arm to correct the drag link angle and a new rear drag link because the joint is shot? Or maybe just a new boot on the rear drag...

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