The vacuum hose routing diagram label is usually located in one of two spots: on the underside of the hood or on the top of the fan shroud. Here's a copy I made myself with the intention of helping the DIY community.
NOTE: This vacuum routing diagram illustration only applies to:
- 1988 2.8L Chevrolet S10 Pick-up.
- 1988 2.8L Chevrolet S10 Blazer.
- 1988 2.8L GMC S15 Pickup.
- 1988 2.8L GMC S15 Jimmy.
If this info really saved the day, buy me a beer!