GM and GMC

What would cause a whistling sound in a GMC Pickup 1993 only when the engine is warm?

Top Answer
User Avatar
Wiki User
2006-09-11 14:13:00
2006-09-11 14:13:00

"Whistling" sounds are generally vacuum leaks. Start around the EGR valve and/or air intake de-icing assembly.

Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.