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mountie · 01-06-2018, 07:07 PM

There is a door to allow heat to enter cab. located, sort of below / right side of radio. access by removing glove box..... to left of glove box opening....

Also ...maybe your heater core is covered with leaves & junk. The stuff that wiggles it's way down from the vent, at bottom of windshield.

( When I replaced my A/C, I found my heater core covered with crap )

( My '88 Sierra )

01-06-2018, 07:07 PM	#5
mountie Registered User Join Date: Jun 2011 Location: Bradenton, Fla. Posts: 1,100	Re: 1993 chevy Silverado 4.3l xcab c1500 low heat problem There is a door to allow heat to enter cab. located, sort of below / right side of radio. access by removing glove box..... to left of glove box opening.... Also ...maybe your heater core is covered with leaves & junk. The stuff that wiggles it's way down from the vent, at bottom of windshield. ( When I replaced my A/C, I found my heater core covered with crap ) ( My '88 Sierra ) __________________ '70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018)