Heater

Asked by Charity Nov 26, 2019 at 10:22 PM about the 2005 GMC Yukon

Question type: Maintenance & Repair

I just got my cam and lifters replaced. Now my
heater only blows out of the defrost on the dash. I
own a 2005 GMC Yukon. Any ideas?

1 Answer
157,615

James answered 4 years ago

Check for a disconnected vacuum hose at the firewall. When you find it plug it in to a vacuum nipple on the intake manifold. Hope that helps! Jim

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