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89 crew · 02-23-2008, 07:44 AM

It wouldn't have much effect on the engine. All it could do is leave the heat in the cooling system/ engine instead of heating the air in the cab. Basically it would be like driving with the heater off to the engine.

02-23-2008, 07:44 AM	#5
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: 04 Sierra Heating Problem It wouldn't have much effect on the engine. All it could do is leave the heat in the cooling system/ engine instead of heating the air in the cab. Basically it would be like driving with the heater off to the engine.