Heater - A/C switch question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

danadena1960 · 02-25-2004, 02:02 AM

Hey All,
I have a 1977 K-20 with A/C. When I bought the truck the blower motor did not work on the HI setting or with the A/C setting on MAX. I replaced a resistor and relay on the heater box. Now everything seems to work fine, but I have noticed when I hit a bump it quits then comes back on. This happens only in the HI setting, all other setting do not seem to be bothered. I was telling this to a buddy and he said being I have the dash all apart I should change the actual switch on the insurment panel. He said those switches are common to go out and LMC sells them for $10. Has anybody else heard of this problem?
Thanks,
Dana

02-25-2004, 02:02 AM	#1
danadena1960 Registered User Join Date: Aug 2003 Location: Stockbridge, GA (Suburbs of Atlanta) Posts: 126	Heater - A/C switch question Hey All, I have a 1977 K-20 with A/C. When I bought the truck the blower motor did not work on the HI setting or with the A/C setting on MAX. I replaced a resistor and relay on the heater box. Now everything seems to work fine, but I have noticed when I hit a bump it quits then comes back on. This happens only in the HI setting, all other setting do not seem to be bothered. I was telling this to a buddy and he said being I have the dash all apart I should change the actual switch on the insurment panel. He said those switches are common to go out and LMC sells them for $10. Has anybody else heard of this problem? Thanks, Dana __________________ Dana 77 K-20 454 73 SS El Camino 454 68 SS Camaro 327 48 Chevy 216 755 John Deere

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