I have a 1993 GMC suburban K1500, 5.7 engine. After engine warms up engine starts whing and whisling from TBI area. fixed a couplevacuum leaks and tested all front engine pulley but still cant find problem.

Asked by Feb 18, 2016 at 01:10 PM about the 1993 GMC Sierra C/K 1500

Question type: Maintenance & Repair

I have a 1993 GMC suburban K1500, 5.7 engine. After engine warms up, engine starts whining and whistling from TBI area. Fixed two vacuum leaks and tested allfront engine pulleys, but still doing it. Can anybody help?

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I've heard the power steering pump whine in multiple trucks. I've heard the iac whistle, wouldn't hurt to take it out and see if it's dirty in there

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