buckwild27
Full Access Member
- Joined
- Feb 7, 2024
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14-18 sierra/silverado and the 15-20 tahoe/yukon for sure have vacuum pumps to increase vacuum for when it is in 4 cylinder mode. the 07-14 doesn't have them. I'm just use to working on the newer one's so vacuum pump info is of no use here.you've truck has a vacuum pump for the afm?