Problems with 987 suburban
I have an 87 3/4ton 4x4 Suburban. The heating system doesn't seem to be right. It usually will roast you out. But I noticed it is blowing cool air out the vents and won't put heat to the defrost or heater by themselves. I messed with the slider and finally got it to work correctly. Only to have it do the same thing the next day and now work correctly. Any suggestions?
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1984 1ton 4x4 crew cab dually 6.2 diesel,465,205,D60,D70,1987 3/4ton 4x4 suburban 5.7 FI350,TH400,208,1985 CJ-7 FI406,465,205,D60,FF14, 1970 Jeepster 350,465,205,D44,FF14,
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