Intake Manifold Cleaning and Inspection for GMC Truck TopKick C-Series (Conventional) C4/C5 2004

1. Clean the intake manifold crossover.
2. Clean the intake manifold mating surfaces.



3. Clean the intake manifolds.
4. Clean the intake manifold mating surfaces.
5. Inspect the intake manifolds for cracks.
6. Inspect the intake manifold mating surfaces for damage.
7. Replace the intake manifolds if any damage is found.