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ss3011 · 12-05-2020, 08:23 PM

GM has standards for heater performance, so heating up coolant quickly so the heater provides heat to the passengers is a high priority . Included in that is they don't want to shock the block and heads with cold coolant ,so the special thermostat was developed . I believe its similar to the older LT1 style thermostat .

12-05-2020, 08:23 PM	#1
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Are there any GM Techs out there? GM has standards for heater performance, so heating up coolant quickly so the heater provides heat to the passengers is a high priority . Included in that is they don't want to shock the block and heads with cold coolant ,so the special thermostat was developed . I believe its similar to the older LT1 style thermostat .